diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index e50891bbc1c..9e9549ed93f 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,19 +1,19 @@
 exclude: doc/en/example/py2py3/test_py2.py
 repos:
 -   repo: https://github.com/ambv/black
-    rev: 18.4a4
+    rev: 18.6b4
     hooks:
     -   id: black
         args: [--safe, --quiet]
         language_version: python3.6
 -   repo: https://github.com/asottile/blacken-docs
-    rev: v0.1.1
+    rev: v0.2.0
     hooks:
     -   id: blacken-docs
-        additional_dependencies: [black==18.5b1]
+        additional_dependencies: [black==18.6b4]
         language_version: python3.6
 -   repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v1.2.3
+    rev: v1.3.0
     hooks:
     -   id: trailing-whitespace
     -   id: end-of-file-fixer
diff --git a/doc/en/example/assertion/failure_demo.py b/doc/en/example/assertion/failure_demo.py
index dc27f5dfbc1..0a104578c50 100644
--- a/doc/en/example/assertion/failure_demo.py
+++ b/doc/en/example/assertion/failure_demo.py
@@ -25,9 +25,7 @@ def pytest_generate_tests(metafunc):
 
 
 class TestFailing(object):
-
     def test_simple(self):
-
         def f():
             return 42
 
@@ -40,7 +38,6 @@ def test_simple_multiline(self):
         otherfunc_multi(42, 6 * 9)
 
     def test_not(self):
-
         def f():
             return 42
 
@@ -48,7 +45,6 @@ def f():
 
 
 class TestSpecialisedExplanations(object):
-
     def test_eq_text(self):
         assert "spam" == "eggs"
 
@@ -106,7 +102,6 @@ def test_not_in_text_single_long_term(self):
 
 
 def test_attribute():
-
     class Foo(object):
         b = 1
 
@@ -115,7 +110,6 @@ class Foo(object):
 
 
 def test_attribute_instance():
-
     class Foo(object):
         b = 1
 
@@ -123,9 +117,7 @@ class Foo(object):
 
 
 def test_attribute_failure():
-
     class Foo(object):
-
         def _get_b(self):
             raise Exception("Failed to get attrib")
 
@@ -136,7 +128,6 @@ def _get_b(self):
 
 
 def test_attribute_multiple():
-
     class Foo(object):
         b = 1
 
@@ -151,7 +142,6 @@ def globf(x):
 
 
 class TestRaises(object):
-
     def test_raises(self):
         s = "qwe"  # NOQA
         raises(TypeError, "int(s)")
@@ -193,9 +183,7 @@ def test_dynamic_compile_shows_nicely():
 
 
 class TestMoreErrors(object):
-
     def test_complex_error(self):
-
         def f():
             return 44
 
@@ -218,7 +206,6 @@ def test_startswith(self):
         assert s.startswith(g)
 
     def test_startswith_nested(self):
-
         def f():
             return "123"
 
@@ -246,9 +233,7 @@ def test_try_finally(self):
 
 
 class TestCustomAssertMsg(object):
-
     def test_single_line(self):
-
         class A(object):
             a = 1
 
@@ -256,7 +241,6 @@ class A(object):
         assert A.a == b, "A.a appears not to be b"
 
     def test_multiline(self):
-
         class A(object):
             a = 1
 
@@ -266,7 +250,6 @@ class A(object):
         ), "A.a appears not to be b\n" "or does not appear to be b\none of those"
 
     def test_custom_repr(self):
-
         class JSON(object):
             a = 1
 
diff --git a/doc/en/example/assertion/test_failures.py b/doc/en/example/assertion/test_failures.py
index 1150ec12f66..43f748fa2c3 100644
--- a/doc/en/example/assertion/test_failures.py
+++ b/doc/en/example/assertion/test_failures.py
@@ -2,7 +2,7 @@
 import py
 
 failure_demo = py.path.local(__file__).dirpath("failure_demo.py")
-pytest_plugins = "pytester",
+pytest_plugins = ("pytester",)
 
 
 def test_failure_demo_fails_properly(testdir):
diff --git a/doc/en/example/assertion/test_setup_flow_example.py b/doc/en/example/assertion/test_setup_flow_example.py
index c00711dc238..eb339f47418 100644
--- a/doc/en/example/assertion/test_setup_flow_example.py
+++ b/doc/en/example/assertion/test_setup_flow_example.py
@@ -3,7 +3,6 @@ def setup_module(module):
 
 
 class TestStateFullThing(object):
-
     def setup_class(cls):
         cls.classcount += 1
 
diff --git a/doc/en/example/costlysetup/conftest.py b/doc/en/example/costlysetup/conftest.py
index 466c62c06ab..e41c4129c68 100644
--- a/doc/en/example/costlysetup/conftest.py
+++ b/doc/en/example/costlysetup/conftest.py
@@ -10,7 +10,6 @@ def setup(request):
 
 
 class CostlySetup(object):
-
     def __init__(self):
         import time
 
diff --git a/doc/en/example/multipython.py b/doc/en/example/multipython.py
index 970800c7e61..299833f7175 100644
--- a/doc/en/example/multipython.py
+++ b/doc/en/example/multipython.py
@@ -21,7 +21,6 @@ def python2(request, python1):
 
 
 class Python(object):
-
     def __init__(self, version, picklefile):
         self.pythonpath = py.path.local.sysfind(version)
         if not self.pythonpath:
diff --git a/doc/en/example/nonpython/conftest.py b/doc/en/example/nonpython/conftest.py
index 8429dd114b1..9732dc41b5e 100644
--- a/doc/en/example/nonpython/conftest.py
+++ b/doc/en/example/nonpython/conftest.py
@@ -9,7 +9,6 @@ def pytest_collect_file(parent, path):
 
 
 class YamlFile(pytest.File):
-
     def collect(self):
         import yaml  # we need a yaml parser, e.g. PyYAML
 
@@ -19,7 +18,6 @@ def collect(self):
 
 
 class YamlItem(pytest.Item):
-
     def __init__(self, name, parent, spec):
         super(YamlItem, self).__init__(name, parent)
         self.spec = spec
diff --git a/doc/en/example/py2py3/conftest.py b/doc/en/example/py2py3/conftest.py
index 5d9a07e3e32..9c1c6fa3824 100644
--- a/doc/en/example/py2py3/conftest.py
+++ b/doc/en/example/py2py3/conftest.py
@@ -5,7 +5,6 @@
 
 
 class DummyCollector(pytest.collect.File):
-
     def collect(self):
         return []
 
diff --git a/doc/en/example/pythoncollection.py b/doc/en/example/pythoncollection.py
index 3603361c3dc..b134d809df2 100644
--- a/doc/en/example/pythoncollection.py
+++ b/doc/en/example/pythoncollection.py
@@ -7,7 +7,6 @@ def test_function():
 
 
 class TestClass(object):
-
     def test_method(self):
         pass
 
diff --git a/src/_pytest/_code/code.py b/src/_pytest/_code/code.py
index cb788c17f04..0e5e580b697 100644
--- a/src/_pytest/_code/code.py
+++ b/src/_pytest/_code/code.py
@@ -274,6 +274,7 @@ class Traceback(list):
     """ Traceback objects encapsulate and offer higher level
         access to Traceback entries.
     """
+
     Entry = TracebackEntry
 
     def __init__(self, tb, excinfo=None):
@@ -382,8 +383,11 @@ class ExceptionInfo(object):
     """ wraps sys.exc_info() objects and offers
         help for navigating the traceback.
     """
+
     _striptext = ""
-    _assert_start_repr = "AssertionError(u'assert " if _PY2 else "AssertionError('assert "
+    _assert_start_repr = (
+        "AssertionError(u'assert " if _PY2 else "AssertionError('assert "
+    )
 
     def __init__(self, tup=None, exprinfo=None):
         import _pytest._code
@@ -424,7 +428,7 @@ def exconly(self, tryshort=False):
         text = text.rstrip()
         if tryshort:
             if text.startswith(self._striptext):
-                text = text[len(self._striptext):]
+                text = text[len(self._striptext) :]
         return text
 
     def errisinstance(self, exc):
@@ -497,6 +501,7 @@ def match(self, regexp):
 @attr.s
 class FormattedExcinfo(object):
     """ presenting information about failing Functions and Generators. """
+
     # for traceback entries
     flow_marker = ">"
     fail_marker = "E"
@@ -556,7 +561,7 @@ def get_source(self, source, line_index=-1, excinfo=None, short=False):
             for line in source.lines[:line_index]:
                 lines.append(space_prefix + line)
             lines.append(self.flow_marker + "   " + source.lines[line_index])
-            for line in source.lines[line_index + 1:]:
+            for line in source.lines[line_index + 1 :]:
                 lines.append(space_prefix + line)
         if excinfo is not None:
             indent = 4 if short else self._getindent(source)
@@ -691,7 +696,7 @@ def _truncate_recursive_traceback(self, traceback):
         else:
             if recursionindex is not None:
                 extraline = "!!! Recursion detected (same locals & position)"
-                traceback = traceback[:recursionindex + 1]
+                traceback = traceback[: recursionindex + 1]
             else:
                 extraline = None
 
@@ -722,15 +727,19 @@ def repr_excinfo(self, excinfo):
                 repr_chain += [(reprtraceback, reprcrash, descr)]
                 if e.__cause__ is not None:
                     e = e.__cause__
-                    excinfo = ExceptionInfo(
-                        (type(e), e, e.__traceback__)
-                    ) if e.__traceback__ else None
+                    excinfo = (
+                        ExceptionInfo((type(e), e, e.__traceback__))
+                        if e.__traceback__
+                        else None
+                    )
                     descr = "The above exception was the direct cause of the following exception:"
-                elif (e.__context__ is not None and not e.__suppress_context__):
+                elif e.__context__ is not None and not e.__suppress_context__:
                     e = e.__context__
-                    excinfo = ExceptionInfo(
-                        (type(e), e, e.__traceback__)
-                    ) if e.__traceback__ else None
+                    excinfo = (
+                        ExceptionInfo((type(e), e, e.__traceback__))
+                        if e.__traceback__
+                        else None
+                    )
                     descr = "During handling of the above exception, another exception occurred:"
                 else:
                     e = None
@@ -739,7 +748,6 @@ def repr_excinfo(self, excinfo):
 
 
 class TerminalRepr(object):
-
     def __str__(self):
         s = self.__unicode__()
         if _PY2:
@@ -759,7 +767,6 @@ def __repr__(self):
 
 
 class ExceptionRepr(TerminalRepr):
-
     def __init__(self):
         self.sections = []
 
@@ -773,7 +780,6 @@ def toterminal(self, tw):
 
 
 class ExceptionChainRepr(ExceptionRepr):
-
     def __init__(self, chain):
         super(ExceptionChainRepr, self).__init__()
         self.chain = chain
@@ -792,7 +798,6 @@ def toterminal(self, tw):
 
 
 class ReprExceptionInfo(ExceptionRepr):
-
     def __init__(self, reprtraceback, reprcrash):
         super(ReprExceptionInfo, self).__init__()
         self.reprtraceback = reprtraceback
@@ -831,7 +836,6 @@ def toterminal(self, tw):
 
 
 class ReprTracebackNative(ReprTraceback):
-
     def __init__(self, tblines):
         self.style = "native"
         self.reprentries = [ReprEntryNative(tblines)]
@@ -885,7 +889,6 @@ def __str__(self):
 
 
 class ReprFileLocation(TerminalRepr):
-
     def __init__(self, path, lineno, message):
         self.path = str(path)
         self.lineno = lineno
@@ -903,7 +906,6 @@ def toterminal(self, tw):
 
 
 class ReprLocals(TerminalRepr):
-
     def __init__(self, lines):
         self.lines = lines
 
@@ -913,7 +915,6 @@ def toterminal(self, tw):
 
 
 class ReprFuncArgs(TerminalRepr):
-
     def __init__(self, args):
         self.args = args
 
diff --git a/src/_pytest/_code/source.py b/src/_pytest/_code/source.py
index 6b982a4cac4..711408f6146 100644
--- a/src/_pytest/_code/source.py
+++ b/src/_pytest/_code/source.py
@@ -17,6 +17,7 @@ class Source(object):
     """ an immutable object holding a source code fragment,
         possibly deindenting it.
     """
+
     _compilecounter = 0
 
     def __init__(self, *parts, **kwargs):
@@ -60,7 +61,7 @@ def __getitem__(self, key):
             if key.step not in (None, 1):
                 raise IndexError("cannot slice a Source with a step")
             newsource = Source()
-            newsource.lines = self.lines[key.start:key.stop]
+            newsource.lines = self.lines[key.start : key.stop]
             return newsource
 
     def __len__(self):
@@ -178,7 +179,7 @@ def compile(
         except SyntaxError:
             ex = sys.exc_info()[1]
             # re-represent syntax errors from parsing python strings
-            msglines = self.lines[:ex.lineno]
+            msglines = self.lines[: ex.lineno]
             if ex.offset:
                 msglines.append(" " * ex.offset + "^")
             msglines.append("(code was compiled probably from here: %s)" % filename)
@@ -313,7 +314,7 @@ def readline_generator(lines):
     except (IndentationError, tokenize.TokenError):
         pass
     # Add any lines we didn't see. E.g. if an exception was raised.
-    newlines.extend(lines[len(newlines):])
+    newlines.extend(lines[len(newlines) :])
     return newlines
 
 
diff --git a/src/_pytest/assertion/rewrite.py b/src/_pytest/assertion/rewrite.py
index 92f4ab10d5a..bc18aa1fc34 100644
--- a/src/_pytest/assertion/rewrite.py
+++ b/src/_pytest/assertion/rewrite.py
@@ -319,7 +319,7 @@ def _rewrite_test(config, fn):
         if (
             not source.startswith(BOM_UTF8)
             and cookie_re.match(source[0:end1]) is None
-            and cookie_re.match(source[end1 + 1:end2]) is None
+            and cookie_re.match(source[end1 + 1 : end2]) is None
         ):
             if hasattr(state, "_indecode"):
                 # encodings imported us again, so don't rewrite.
diff --git a/src/_pytest/assertion/util.py b/src/_pytest/assertion/util.py
index bcb800a4a07..08213c80e01 100644
--- a/src/_pytest/assertion/util.py
+++ b/src/_pytest/assertion/util.py
@@ -322,7 +322,7 @@ def _compare_eq_dict(left, right, verbose=False):
 def _notin_text(term, text, verbose=False):
     index = text.find(term)
     head = text[:index]
-    tail = text[index + len(term):]
+    tail = text[index + len(term) :]
     correct_text = head + tail
     diff = _diff_text(correct_text, text, verbose)
     newdiff = [u("%s is contained here:") % py.io.saferepr(term, maxsize=42)]
diff --git a/src/_pytest/cacheprovider.py b/src/_pytest/cacheprovider.py
index eb0fcc06f9b..53b6ebb6193 100755
--- a/src/_pytest/cacheprovider.py
+++ b/src/_pytest/cacheprovider.py
@@ -18,7 +18,6 @@
 
 
 class Cache(object):
-
     def __init__(self, config):
         self.config = config
         self._cachedir = Cache.cache_dir_from_config(config)
@@ -199,9 +198,7 @@ def pytest_collection_modifyitems(self, session, config, items):
 
             items[:] = self._get_increasing_order(
                 six.itervalues(new_items)
-            ) + self._get_increasing_order(
-                six.itervalues(other_items)
-            )
+            ) + self._get_increasing_order(six.itervalues(other_items))
         self.cached_nodeids = [x.nodeid for x in items if isinstance(x, pytest.Item)]
 
     def _get_increasing_order(self, items):
diff --git a/src/_pytest/capture.py b/src/_pytest/capture.py
index 7a57adb752a..faa767a86c5 100644
--- a/src/_pytest/capture.py
+++ b/src/_pytest/capture.py
@@ -531,7 +531,6 @@ def snap(self):
 
 
 class SysCapture(object):
-
     def __init__(self, fd, tmpfile=None):
         name = patchsysdict[fd]
         self._old = getattr(sys, name)
@@ -569,7 +568,6 @@ def writeorg(self, data):
 
 
 class SysCaptureBinary(SysCapture):
-
     def snap(self):
         res = self.tmpfile.buffer.getvalue()
         self.tmpfile.seek(0)
diff --git a/src/_pytest/compat.py b/src/_pytest/compat.py
index 7abd3d53ff9..3ca27fe6071 100644
--- a/src/_pytest/compat.py
+++ b/src/_pytest/compat.py
@@ -72,12 +72,8 @@ def iscoroutinefunction(func):
     Note: copied and modified from Python 3.5's builtin couroutines.py to avoid import asyncio directly,
     which in turns also initializes the "logging" module as side-effect (see issue #8).
     """
-    return (
-        getattr(func, "_is_coroutine", False)
-        or (
-            hasattr(inspect, "iscoroutinefunction")
-            and inspect.iscoroutinefunction(func)
-        )
+    return getattr(func, "_is_coroutine", False) or (
+        hasattr(inspect, "iscoroutinefunction") and inspect.iscoroutinefunction(func)
     )
 
 
@@ -138,17 +134,13 @@ def getfuncargnames(function, is_method=False, cls=None):
     # If this function should be treated as a bound method even though
     # it's passed as an unbound method or function, remove the first
     # parameter name.
-    if (
-        is_method
-        or (
-            cls
-            and not isinstance(cls.__dict__.get(function.__name__, None), staticmethod)
-        )
+    if is_method or (
+        cls and not isinstance(cls.__dict__.get(function.__name__, None), staticmethod)
     ):
         arg_names = arg_names[1:]
     # Remove any names that will be replaced with mocks.
     if hasattr(function, "__wrapped__"):
-        arg_names = arg_names[num_mock_patch_args(function):]
+        arg_names = arg_names[num_mock_patch_args(function) :]
     return arg_names
 
 
@@ -340,7 +332,6 @@ def _setup_collect_fakemodule():
     from py.io import TextIO
 
     class CaptureIO(TextIO):
-
         @property
         def encoding(self):
             return getattr(self, "_encoding", "UTF-8")
@@ -350,7 +341,6 @@ def encoding(self):
     import io
 
     class CaptureIO(io.TextIOWrapper):
-
         def __init__(self):
             super(CaptureIO, self).__init__(
                 io.BytesIO(), encoding="UTF-8", newline="", write_through=True
diff --git a/src/_pytest/config/__init__.py b/src/_pytest/config/__init__.py
index 11348b80d0f..7e7f3b6d216 100644
--- a/src/_pytest/config/__init__.py
+++ b/src/_pytest/config/__init__.py
@@ -30,7 +30,6 @@
 
 
 class ConftestImportFailure(Exception):
-
     def __init__(self, path, excinfo):
         Exception.__init__(self, path, excinfo)
         self.path = path
@@ -318,9 +317,11 @@ def pytest_configure(self, config):
         self._configured = True
 
     def _warn(self, message):
-        kwargs = message if isinstance(message, dict) else {
-            "code": "I1", "message": message, "fslocation": None, "nodeid": None
-        }
+        kwargs = (
+            message
+            if isinstance(message, dict)
+            else {"code": "I1", "message": message, "fslocation": None, "nodeid": None}
+        )
         self.hook.pytest_logwarning.call_historic(kwargs=kwargs)
 
     #
@@ -335,9 +336,11 @@ def _set_initial_conftests(self, namespace):
             here.
         """
         current = py.path.local()
-        self._confcutdir = current.join(
-            namespace.confcutdir, abs=True
-        ) if namespace.confcutdir else None
+        self._confcutdir = (
+            current.join(namespace.confcutdir, abs=True)
+            if namespace.confcutdir
+            else None
+        )
         self._noconftest = namespace.noconftest
         testpaths = namespace.file_or_dir
         foundanchor = False
@@ -405,7 +408,9 @@ def _importconftest(self, conftestpath):
             try:
                 mod = conftestpath.pyimport()
                 if hasattr(mod, "pytest_plugins") and self._configured:
-                    from _pytest.deprecated import PYTEST_PLUGINS_FROM_NON_TOP_LEVEL_CONFTEST
+                    from _pytest.deprecated import (
+                        PYTEST_PLUGINS_FROM_NON_TOP_LEVEL_CONFTEST
+                    )
 
                     warnings.warn(PYTEST_PLUGINS_FROM_NON_TOP_LEVEL_CONFTEST)
             except Exception:
@@ -477,7 +482,8 @@ def import_plugin(self, modname):
         except ImportError as e:
             new_exc_type = ImportError
             new_exc_message = 'Error importing plugin "%s": %s' % (
-                modname, safe_str(e.args[0])
+                modname,
+                safe_str(e.args[0]),
             )
             new_exc = new_exc_type(new_exc_message)
 
@@ -518,7 +524,6 @@ def _ensure_removed_sysmodule(modname):
 
 
 class Notset(object):
-
     def __repr__(self):
         return "<NOTSET>"
 
diff --git a/src/_pytest/config/argparsing.py b/src/_pytest/config/argparsing.py
index 781d8e8c4ee..21d99b0ceec 100644
--- a/src/_pytest/config/argparsing.py
+++ b/src/_pytest/config/argparsing.py
@@ -149,6 +149,7 @@ class Argument(object):
     and ignoring choices and integer prefixes
     https://docs.python.org/3/library/optparse.html#optparse-standard-option-types
     """
+
     _typ_map = {"int": int, "string": str, "float": float, "complex": complex}
 
     def __init__(self, *names, **attrs):
@@ -274,7 +275,6 @@ def __repr__(self):
 
 
 class OptionGroup(object):
-
     def __init__(self, name, description="", parser=None):
         self.name = name
         self.description = description
@@ -312,7 +312,6 @@ def _addoption_instance(self, option, shortupper=False):
 
 
 class MyOptionParser(argparse.ArgumentParser):
-
     def __init__(self, parser, extra_info=None):
         if not extra_info:
             extra_info = {}
@@ -378,9 +377,8 @@ def _format_action_invocation(self, action):
             xxoption = option[2:]
             if xxoption.split()[0] not in option_map:
                 shortened = xxoption.replace("-", "")
-                if (
-                    shortened not in short_long
-                    or len(short_long[shortened]) < len(xxoption)
+                if shortened not in short_long or len(short_long[shortened]) < len(
+                    xxoption
                 ):
                     short_long[shortened] = xxoption
         # now short_long has been filled out to the longest with dashes
diff --git a/src/_pytest/config/exceptions.py b/src/_pytest/config/exceptions.py
index 64bae834d1c..19fe5cb08ed 100644
--- a/src/_pytest/config/exceptions.py
+++ b/src/_pytest/config/exceptions.py
@@ -5,4 +5,5 @@ class UsageError(Exception):
 class PrintHelp(Exception):
     """Raised when pytest should print it's help to skip the rest of the
     argument parsing and validation."""
+
     pass
diff --git a/src/_pytest/config/findpaths.py b/src/_pytest/config/findpaths.py
index fde7bddb939..234aa69c734 100644
--- a/src/_pytest/config/findpaths.py
+++ b/src/_pytest/config/findpaths.py
@@ -74,7 +74,6 @@ def get_common_ancestor(paths):
 
 
 def get_dirs_from_args(args):
-
     def is_option(x):
         return str(x).startswith("-")
 
diff --git a/src/_pytest/debugging.py b/src/_pytest/debugging.py
index 2e253aaa2af..3fc3eb55290 100644
--- a/src/_pytest/debugging.py
+++ b/src/_pytest/debugging.py
@@ -65,6 +65,7 @@ def fin():
 
 class pytestPDB(object):
     """ Pseudo PDB that defers to the real pdb. """
+
     _pluginmanager = None
     _config = None
     _pdb_cls = pdb.Pdb
@@ -87,7 +88,6 @@ def set_trace(cls):
 
 
 class PdbInvoke(object):
-
     def pytest_exception_interact(self, node, call, report):
         capman = node.config.pluginmanager.getplugin("capturemanager")
         if capman:
@@ -114,7 +114,9 @@ def _enter_pdb(node, excinfo, rep):
     showcapture = node.config.option.showcapture
 
     for sectionname, content in (
-        ("stdout", rep.capstdout), ("stderr", rep.capstderr), ("log", rep.caplog)
+        ("stdout", rep.capstdout),
+        ("stderr", rep.capstderr),
+        ("log", rep.caplog),
     ):
         if showcapture in (sectionname, "all") and content:
             tw.sep(">", "captured " + sectionname)
@@ -148,9 +150,7 @@ def _find_last_non_hidden_frame(stack):
 
 
 def post_mortem(t):
-
     class Pdb(pytestPDB._pdb_cls):
-
         def get_stack(self, f, t):
             stack, i = pdb.Pdb.get_stack(self, f, t)
             if f is None:
diff --git a/src/_pytest/deprecated.py b/src/_pytest/deprecated.py
index 7ebdcf99972..b3c40c2ae45 100644
--- a/src/_pytest/deprecated.py
+++ b/src/_pytest/deprecated.py
@@ -22,7 +22,9 @@ class RemovedInPytest4Warning(DeprecationWarning):
     "Please remove the prefix and use the @pytest.fixture decorator instead."
 )
 
-CFG_PYTEST_SECTION = "[pytest] section in {filename} files is deprecated, use [tool:pytest] instead."
+CFG_PYTEST_SECTION = (
+    "[pytest] section in {filename} files is deprecated, use [tool:pytest] instead."
+)
 
 GETFUNCARGVALUE = "use of getfuncargvalue is deprecated, use getfixturevalue"
 
diff --git a/src/_pytest/doctest.py b/src/_pytest/doctest.py
index b0a3ad08dfc..57d3367e403 100644
--- a/src/_pytest/doctest.py
+++ b/src/_pytest/doctest.py
@@ -105,7 +105,6 @@ def _is_doctest(config, path, parent):
 
 
 class ReprFailDoctest(TerminalRepr):
-
     def __init__(self, reprlocation_lines):
         # List of (reprlocation, lines) tuples
         self.reprlocation_lines = reprlocation_lines
@@ -118,7 +117,6 @@ def toterminal(self, tw):
 
 
 class MultipleDoctestFailures(Exception):
-
     def __init__(self, failures):
         super(MultipleDoctestFailures, self).__init__()
         self.failures = failures
@@ -172,7 +170,6 @@ def _get_runner(checker=None, verbose=None, optionflags=0, continue_on_failure=T
 
 
 class DoctestItem(pytest.Item):
-
     def __init__(self, name, parent, runner=None, dtest=None):
         super(DoctestItem, self).__init__(name, parent)
         self.runner = runner
@@ -243,7 +240,7 @@ def repr_failure(self, excinfo):
                         for (i, x) in enumerate(lines)
                     ]
                     # trim docstring error lines to 10
-                    lines = lines[max(example.lineno - 9, 0):example.lineno + 1]
+                    lines = lines[max(example.lineno - 9, 0) : example.lineno + 1]
                 else:
                     lines = [
                         "EXAMPLE LOCATION UNKNOWN, not showing all tests of that example"
@@ -255,9 +252,7 @@ def repr_failure(self, excinfo):
                 if isinstance(failure, doctest.DocTestFailure):
                     lines += checker.output_difference(
                         example, failure.got, report_choice
-                    ).split(
-                        "\n"
-                    )
+                    ).split("\n")
                 else:
                     inner_excinfo = ExceptionInfo(failure.exc_info)
                     lines += ["UNEXPECTED EXCEPTION: %s" % repr(inner_excinfo.value)]
@@ -347,7 +342,6 @@ def _check_all_skipped(test):
 
 
 class DoctestModule(pytest.Module):
-
     def collect(self):
         import doctest
 
@@ -480,9 +474,7 @@ def _get_report_choice(key):
         DOCTEST_REPORT_CHOICE_NDIFF: doctest.REPORT_NDIFF,
         DOCTEST_REPORT_CHOICE_ONLY_FIRST_FAILURE: doctest.REPORT_ONLY_FIRST_FAILURE,
         DOCTEST_REPORT_CHOICE_NONE: 0,
-    }[
-        key
-    ]
+    }[key]
 
 
 def _fix_spoof_python2(runner, encoding):
@@ -502,7 +494,6 @@ def _fix_spoof_python2(runner, encoding):
     from doctest import _SpoofOut
 
     class UnicodeSpoof(_SpoofOut):
-
         def getvalue(self):
             result = _SpoofOut.getvalue(self)
             if encoding and isinstance(result, bytes):
diff --git a/src/_pytest/fixtures.py b/src/_pytest/fixtures.py
index 495e6b9b332..151346413a3 100644
--- a/src/_pytest/fixtures.py
+++ b/src/_pytest/fixtures.py
@@ -65,7 +65,6 @@ def pytest_sessionstart(session):
 
 
 def scopeproperty(name=None, doc=None):
-
     def decoratescope(func):
         scopename = name or func.__name__
 
@@ -276,7 +275,6 @@ def get_direct_param_fixture_func(request):
 
 
 class FuncFixtureInfo(object):
-
     def __init__(self, argnames, names_closure, name2fixturedefs):
         self.argnames = argnames
         self.names_closure = names_closure
@@ -698,7 +696,6 @@ def formatrepr(self):
 
 
 class FixtureLookupErrorRepr(TerminalRepr):
-
     def __init__(self, filename, firstlineno, tblines, errorstring, argname):
         self.tblines = tblines
         self.errorstring = errorstring
@@ -837,9 +834,10 @@ def execute(self, request):
         return hook.pytest_fixture_setup(fixturedef=self, request=request)
 
     def __repr__(self):
-        return (
-            "<FixtureDef name=%r scope=%r baseid=%r >"
-            % (self.argname, self.scope, self.baseid)
+        return "<FixtureDef name=%r scope=%r baseid=%r >" % (
+            self.argname,
+            self.scope,
+            self.baseid,
         )
 
 
@@ -1064,7 +1062,7 @@ def _getautousenames(self, nodeid):
             if nodeid.startswith(baseid):
                 if baseid:
                     i = len(baseid)
-                    nextchar = nodeid[i:i + 1]
+                    nextchar = nodeid[i : i + 1]
                     if nextchar and nextchar not in ":/":
                         continue
                 autousenames.extend(basenames)
@@ -1171,7 +1169,7 @@ def parsefactories(self, node_or_obj, nodeid=NOTSET, unittest=False):
                 self.config.warn(
                     "C1", deprecated.FUNCARG_PREFIX.format(name=name), nodeid=nodeid
                 )
-                name = name[len(self._argprefix):]
+                name = name[len(self._argprefix) :]
             elif not isinstance(marker, FixtureFunctionMarker):
                 # magic globals  with __getattr__ might have got us a wrong
                 # fixture attribute
diff --git a/src/_pytest/helpconfig.py b/src/_pytest/helpconfig.py
index 5514fec404d..12c3339c647 100644
--- a/src/_pytest/helpconfig.py
+++ b/src/_pytest/helpconfig.py
@@ -149,7 +149,7 @@ def showhelp(config):
             type = "string"
         spec = "%s (%s)" % (name, type)
         line = "  %-24s %s" % (spec, help)
-        tw.line(line[:tw.fullwidth])
+        tw.line(line[: tw.fullwidth])
 
     tw.line()
     tw.line("environment variables:")
diff --git a/src/_pytest/junitxml.py b/src/_pytest/junitxml.py
index 29da27de7cc..86aad69bb6c 100644
--- a/src/_pytest/junitxml.py
+++ b/src/_pytest/junitxml.py
@@ -55,7 +55,6 @@ class Junit(py.xml.Namespace):
 
 
 def bin_xml_escape(arg):
-
     def repl(matchobj):
         i = ord(matchobj.group())
         if i <= 0xFF:
@@ -67,7 +66,6 @@ def repl(matchobj):
 
 
 class _NodeReporter(object):
-
     def __init__(self, nodeid, xml):
 
         self.id = nodeid
@@ -358,7 +356,6 @@ def mangle_test_address(address):
 
 
 class LogXML(object):
-
     def __init__(self, logfile, prefix, suite_name="pytest", logging="no"):
         logfile = os.path.expanduser(os.path.expandvars(logfile))
         self.logfile = os.path.normpath(os.path.abspath(logfile))
@@ -544,9 +541,7 @@ def pytest_sessionfinish(self):
                 skips=self.stats["skipped"],
                 tests=numtests,
                 time="%.3f" % suite_time_delta,
-            ).unicode(
-                indent=0
-            )
+            ).unicode(indent=0)
         )
         logfile.close()
 
diff --git a/src/_pytest/logging.py b/src/_pytest/logging.py
index 00bb9aeb54a..70b6592c405 100644
--- a/src/_pytest/logging.py
+++ b/src/_pytest/logging.py
@@ -409,9 +409,7 @@ def _log_cli_enabled(self):
         """
         return self._config.getoption(
             "--log-cli-level"
-        ) is not None or self._config.getini(
-            "log_cli"
-        )
+        ) is not None or self._config.getini("log_cli")
 
     @contextmanager
     def _runtest_for(self, item, when):
diff --git a/src/_pytest/main.py b/src/_pytest/main.py
index 23562358d7c..7feeaf8cf14 100644
--- a/src/_pytest/main.py
+++ b/src/_pytest/main.py
@@ -343,7 +343,6 @@ def find_module_patched(self, fullname, path=None):
 
 
 class FSHookProxy(object):
-
     def __init__(self, fspath, pm, remove_mods):
         self.fspath = fspath
         self.pm = pm
@@ -361,6 +360,7 @@ class NoMatch(Exception):
 
 class Interrupted(KeyboardInterrupt):
     """ signals an interrupted test run. """
+
     __module__ = "builtins"  # for py3
 
 
diff --git a/src/_pytest/mark/evaluate.py b/src/_pytest/mark/evaluate.py
index a3d11ee0f81..d4bfdaf34a6 100644
--- a/src/_pytest/mark/evaluate.py
+++ b/src/_pytest/mark/evaluate.py
@@ -21,7 +21,6 @@ def cached_eval(config, expr, d):
 
 
 class MarkEvaluator(object):
-
     def __init__(self, item, name):
         self.item = item
         self._marks = None
diff --git a/src/_pytest/mark/structures.py b/src/_pytest/mark/structures.py
index ceacc5c6ba4..eb0349c2f64 100644
--- a/src/_pytest/mark/structures.py
+++ b/src/_pytest/mark/structures.py
@@ -25,9 +25,10 @@ def warned(self):
 
 
 def istestfunc(func):
-    return hasattr(func, "__call__") and getattr(
-        func, "__name__", "<lambda>"
-    ) != "<lambda>"
+    return (
+        hasattr(func, "__call__")
+        and getattr(func, "__name__", "<lambda>") != "<lambda>"
+    )
 
 
 def get_empty_parameterset_mark(config, argnames, func):
@@ -40,18 +41,20 @@ def get_empty_parameterset_mark(config, argnames, func):
         raise LookupError(requested_mark)
     fs, lineno = getfslineno(func)
     reason = "got empty parameter set %r, function %s at %s:%d" % (
-        argnames, func.__name__, fs, lineno
+        argnames,
+        func.__name__,
+        fs,
+        lineno,
     )
     return mark(reason=reason)
 
 
 class ParameterSet(namedtuple("ParameterSet", "values, marks, id")):
-
     @classmethod
     def param(cls, *values, **kw):
         marks = kw.pop("marks", ())
         if isinstance(marks, MarkDecorator):
-            marks = marks,
+            marks = (marks,)
         else:
             assert isinstance(marks, (tuple, list, set))
 
@@ -88,7 +91,7 @@ def extract_from(cls, parameterset, legacy_force_tuple=False):
             argval = argval.args[-1]
         assert not isinstance(argval, ParameterSet)
         if legacy_force_tuple:
-            argval = argval,
+            argval = (argval,)
 
         if newmarks:
             warnings.warn(MARK_PARAMETERSET_UNPACKING)
@@ -333,6 +336,7 @@ def test_function():
 
     will set a 'slowtest' :class:`MarkInfo` object
     on the ``test_function`` object. """
+
     _config = None
 
     def __getattr__(self, name):
@@ -362,7 +366,6 @@ def _check(self, name):
 
 
 class NodeKeywords(MappingMixin):
-
     def __init__(self, node):
         self.node = node
         self.parent = node.parent
@@ -409,6 +412,7 @@ class NodeMarkers(object):
         unstable api
 
     """
+
     own_markers = attr.ib(default=attr.Factory(list))
 
     def update(self, add_markers):
diff --git a/src/_pytest/monkeypatch.py b/src/_pytest/monkeypatch.py
index 16080b5d5cb..e6928f96b53 100644
--- a/src/_pytest/monkeypatch.py
+++ b/src/_pytest/monkeypatch.py
@@ -86,7 +86,6 @@ def derive_importpath(import_path, raising):
 
 
 class Notset(object):
-
     def __repr__(self):
         return "<notset>"
 
diff --git a/src/_pytest/nodes.py b/src/_pytest/nodes.py
index ef74c53eba4..e4b10fe6613 100644
--- a/src/_pytest/nodes.py
+++ b/src/_pytest/nodes.py
@@ -48,7 +48,7 @@ def ischildnode(baseid, nodeid):
     node_parts = _splitnode(nodeid)
     if len(node_parts) < len(base_parts):
         return False
-    return node_parts[:len(base_parts)] == base_parts
+    return node_parts[: len(base_parts)] == base_parts
 
 
 @attr.s
@@ -335,7 +335,6 @@ def _check_initialpaths_for_relpath(session, fspath):
 
 
 class FSCollector(Collector):
-
     def __init__(self, fspath, parent=None, config=None, session=None, nodeid=None):
         fspath = py.path.local(fspath)  # xxx only for test_resultlog.py?
         name = fspath.basename
@@ -369,6 +368,7 @@ class Item(Node):
     """ a basic test invocation item. Note that for a single function
     there might be multiple test invocation items.
     """
+
     nextitem = None
 
     def __init__(self, name, parent=None, config=None, session=None, nodeid=None):
diff --git a/src/_pytest/outcomes.py b/src/_pytest/outcomes.py
index 8a3662e1b3e..63b8453b7b2 100644
--- a/src/_pytest/outcomes.py
+++ b/src/_pytest/outcomes.py
@@ -43,6 +43,7 @@ def __init__(self, msg=None, pytrace=True, allow_module_level=False):
 
 class Failed(OutcomeException):
     """ raised from an explicit call to pytest.fail() """
+
     __module__ = "builtins"
 
 
diff --git a/src/_pytest/pytester.py b/src/_pytest/pytester.py
index c9defe03a66..ce1c8ea1ce3 100644
--- a/src/_pytest/pytester.py
+++ b/src/_pytest/pytester.py
@@ -62,7 +62,6 @@ def pytest_configure(config):
 
 
 class LsofFdLeakChecker(object):
-
     def get_open_files(self):
         out = self._exec_lsof()
         open_files = self._parse_lsof_output(out)
@@ -73,7 +72,6 @@ def _exec_lsof(self):
         return py.process.cmdexec("lsof -Ffn0 -p %d" % pid)
 
     def _parse_lsof_output(self, out):
-
         def isopen(line):
             return line.startswith("f") and (
                 "deleted" not in line
@@ -195,7 +193,6 @@ def _pytest(request):
 
 
 class PytestArg(object):
-
     def __init__(self, request):
         self.request = request
 
@@ -211,7 +208,6 @@ def get_public_names(values):
 
 
 class ParsedCall(object):
-
     def __init__(self, name, kwargs):
         self.__dict__.update(kwargs)
         self._name = name
@@ -423,13 +419,12 @@ def assert_outcomes(self, passed=0, skipped=0, failed=0, error=0):
             "failed": d.get("failed", 0),
             "error": d.get("error", 0),
         }
-        assert (
-            obtained == dict(passed=passed, skipped=skipped, failed=failed, error=error)
+        assert obtained == dict(
+            passed=passed, skipped=skipped, failed=failed, error=error
         )
 
 
 class CwdSnapshot(object):
-
     def __init__(self):
         self.__saved = os.getcwd()
 
@@ -438,7 +433,6 @@ def restore(self):
 
 
 class SysModulesSnapshot(object):
-
     def __init__(self, preserve=None):
         self.__preserve = preserve
         self.__saved = dict(sys.modules)
@@ -453,7 +447,6 @@ def restore(self):
 
 
 class SysPathsSnapshot(object):
-
     def __init__(self):
         self.__saved = list(sys.path), list(sys.meta_path)
 
@@ -778,7 +771,6 @@ def revert_warn_already_imported():
             rec = []
 
             class Collect(object):
-
                 def pytest_configure(x, config):
                     rec.append(self.make_hook_recorder(config.pluginmanager))
 
@@ -910,8 +902,10 @@ def getitem(self, source, funcname="test_func"):
         for item in items:
             if item.name == funcname:
                 return item
-        assert 0, (
-            "%r item not found in module:\n%s\nitems: %s" % (funcname, source, items)
+        assert 0, "%r item not found in module:\n%s\nitems: %s" % (
+            funcname,
+            source,
+            items,
         )
 
     def getitems(self, source):
@@ -1115,7 +1109,6 @@ def getdecoded(out):
 
 
 class LineComp(object):
-
     def __init__(self):
         self.stringio = py.io.TextIO()
 
@@ -1202,7 +1195,7 @@ def get_lines_after(self, fnline):
         """
         for i, line in enumerate(self.lines):
             if fnline == line or fnmatch(line, fnline):
-                return self.lines[i + 1:]
+                return self.lines[i + 1 :]
         raise ValueError("line %r not found in output" % fnline)
 
     def _log(self, *args):
diff --git a/src/_pytest/python.py b/src/_pytest/python.py
index 0dcecdd55bd..8a9c15dc22b 100644
--- a/src/_pytest/python.py
+++ b/src/_pytest/python.py
@@ -69,13 +69,12 @@ def filter_traceback(entry):
     # entry.path might point to a non-existing file, in which case it will
     # also return a str object. see #1133
     p = py.path.local(entry.path)
-    return not p.relto(_pluggy_dir) and not p.relto(_pytest_dir) and not p.relto(
-        _py_dir
+    return (
+        not p.relto(_pluggy_dir) and not p.relto(_pytest_dir) and not p.relto(_py_dir)
     )
 
 
 def pyobj_property(name):
-
     def get(self):
         node = self.getparent(getattr(__import__("pytest"), name))
         if node is not None:
@@ -258,7 +257,6 @@ def __init__(self, *k, **kw):
         super(PyobjMixin, self).__init__(*k, **kw)
 
     def obj():
-
         def fget(self):
             obj = getattr(self, "_obj", None)
             if obj is None:
@@ -320,7 +318,6 @@ def reportinfo(self):
 
 
 class PyCollector(PyobjMixin, nodes.Collector):
-
     def funcnamefilter(self, name):
         return self._matches_prefix_or_glob_option("python_functions", name)
 
@@ -487,9 +484,11 @@ def _importtestmodule(self):
             exc_info = ExceptionInfo()
             if self.config.getoption("verbose") < 2:
                 exc_info.traceback = exc_info.traceback.filter(filter_traceback)
-            exc_repr = exc_info.getrepr(
-                style="short"
-            ) if exc_info.traceback else exc_info.exconly()
+            exc_repr = (
+                exc_info.getrepr(style="short")
+                if exc_info.traceback
+                else exc_info.exconly()
+            )
             formatted_tb = safe_str(exc_repr)
             raise self.CollectError(
                 "ImportError while importing test module '{fspath}'.\n"
@@ -673,7 +672,6 @@ def repr_failure(self, excinfo, outerr=None):
 
 
 class Generator(FunctionMixin, PyCollector):
-
     def collect(self):
         # test generators are seen as collectors but they also
         # invoke setup/teardown on popular request
@@ -728,7 +726,6 @@ def hasnew(obj):
 
 
 class CallSpec2(object):
-
     def __init__(self, metafunc):
         self.metafunc = metafunc
         self.funcargs = {}
@@ -1002,9 +999,9 @@ def _find_parametrized_scope(argnames, arg2fixturedefs, indirect):
     from _pytest.fixtures import scopes
 
     indirect_as_list = isinstance(indirect, (list, tuple))
-    all_arguments_are_fixtures = indirect is True or indirect_as_list and len(
-        indirect
-    ) == argnames
+    all_arguments_are_fixtures = (
+        indirect is True or indirect_as_list and len(indirect) == argnames
+    )
     if all_arguments_are_fixtures:
         fixturedefs = arg2fixturedefs or {}
         used_scopes = [fixturedef[0].scope for name, fixturedef in fixturedefs.items()]
@@ -1026,8 +1023,9 @@ def _idval(val, argname, idx, idfn, config=None):
             # See issue https://github.com/pytest-dev/pytest/issues/2169
             import warnings
 
-            msg = "Raised while trying to determine id of parameter %s at position %d." % (
-                argname, idx
+            msg = (
+                "Raised while trying to determine id of parameter %s at position %d."
+                % (argname, idx)
             )
             msg += "\nUpdate your code as this will raise an error in pytest-4.0."
             warnings.warn(msg, DeprecationWarning)
@@ -1222,6 +1220,7 @@ class Function(FunctionMixin, nodes.Item, fixtures.FuncargnamesCompatAttr):
     """ a Function Item is responsible for setting up and executing a
     Python test function.
     """
+
     _genid = None
     # disable since functions handle it themselfes
     _ALLOW_MARKERS = False
diff --git a/src/_pytest/python_api.py b/src/_pytest/python_api.py
index 5ee16c2f855..d88d1c88bb9 100644
--- a/src/_pytest/python_api.py
+++ b/src/_pytest/python_api.py
@@ -174,6 +174,7 @@ class ApproxScalar(ApproxBase):
     """
     Perform approximate comparisons for single numbers only.
     """
+
     DEFAULT_ABSOLUTE_TOLERANCE = 1e-12
     DEFAULT_RELATIVE_TOLERANCE = 1e-6
 
@@ -271,9 +272,7 @@ def set_default(x, default):
         # we aren't even going to use it.
         relative_tolerance = set_default(
             self.rel, self.DEFAULT_RELATIVE_TOLERANCE
-        ) * abs(
-            self.expected
-        )
+        ) * abs(self.expected)
 
         if relative_tolerance < 0:
             raise ValueError(
@@ -652,7 +651,6 @@ def raises(expected_exception, *args, **kwargs):
 
 
 class RaisesContext(object):
-
     def __init__(self, expected_exception, message, match_expr):
         self.expected_exception = expected_exception
         self.message = message
diff --git a/src/_pytest/recwarn.py b/src/_pytest/recwarn.py
index 7839f5700c8..177757f27ec 100644
--- a/src/_pytest/recwarn.py
+++ b/src/_pytest/recwarn.py
@@ -193,13 +193,10 @@ def __exit__(self, *exc_info):
 
 
 class WarningsChecker(WarningsRecorder):
-
     def __init__(self, expected_warning=None, match_expr=None):
         super(WarningsChecker, self).__init__()
 
-        msg = (
-            "exceptions must be old-style classes or " "derived from Warning, not %s"
-        )
+        msg = "exceptions must be old-style classes or " "derived from Warning, not %s"
         if isinstance(expected_warning, tuple):
             for exc in expected_warning:
                 if not inspect.isclass(exc):
diff --git a/src/_pytest/resultlog.py b/src/_pytest/resultlog.py
index 8f300c98300..0ad31b8bc80 100644
--- a/src/_pytest/resultlog.py
+++ b/src/_pytest/resultlog.py
@@ -68,7 +68,6 @@ def generic_path(item):
 
 
 class ResultLog(object):
-
     def __init__(self, config, logfile):
         self.config = config
         self.logfile = logfile  # preferably line buffered
diff --git a/src/_pytest/runner.py b/src/_pytest/runner.py
index 18e925509ec..ee53642c7d8 100644
--- a/src/_pytest/runner.py
+++ b/src/_pytest/runner.py
@@ -186,6 +186,7 @@ def call_runtest_hook(item, when, **kwds):
 
 class CallInfo(object):
     """ Result/Exception info a function invocation. """
+
     #: None or ExceptionInfo object.
     excinfo = None
 
@@ -221,13 +222,15 @@ def getslaveinfoline(node):
         d = node.slaveinfo
         ver = "%s.%s.%s" % d["version_info"][:3]
         node._slaveinfocache = s = "[%s] %s -- Python %s %s" % (
-            d["id"], d["sysplatform"], ver, d["executable"]
+            d["id"],
+            d["sysplatform"],
+            ver,
+            d["executable"],
         )
         return s
 
 
 class BaseReport(object):
-
     def __init__(self, **kw):
         self.__dict__.update(kw)
 
@@ -401,7 +404,9 @@ def __init__(
 
     def __repr__(self):
         return "<TestReport %r when=%r outcome=%r>" % (
-            self.nodeid, self.when, self.outcome
+            self.nodeid,
+            self.when,
+            self.outcome,
         )
 
 
@@ -442,7 +447,6 @@ def pytest_make_collect_report(collector):
 
 
 class CollectReport(BaseReport):
-
     def __init__(self, nodeid, outcome, longrepr, result, sections=(), **extra):
         self.nodeid = nodeid
         self.outcome = outcome
@@ -457,12 +461,13 @@ def location(self):
 
     def __repr__(self):
         return "<CollectReport %r lenresult=%s outcome=%r>" % (
-            self.nodeid, len(self.result), self.outcome
+            self.nodeid,
+            len(self.result),
+            self.outcome,
         )
 
 
 class CollectErrorRepr(TerminalRepr):
-
     def __init__(self, msg):
         self.longrepr = msg
 
@@ -529,7 +534,7 @@ def teardown_exact(self, item, nextitem):
     def _teardown_towards(self, needed_collectors):
         exc = None
         while self.stack:
-            if self.stack == needed_collectors[:len(self.stack)]:
+            if self.stack == needed_collectors[: len(self.stack)]:
                 break
             try:
                 self._pop_and_teardown()
@@ -551,7 +556,7 @@ def prepare(self, colitem):
         for col in self.stack:
             if hasattr(col, "_prepare_exc"):
                 py.builtin._reraise(*col._prepare_exc)
-        for col in needed_collectors[len(self.stack):]:
+        for col in needed_collectors[len(self.stack) :]:
             self.stack.append(col)
             try:
                 col.setup()
diff --git a/src/_pytest/skipping.py b/src/_pytest/skipping.py
index a348d5484cd..64bc770aea5 100644
--- a/src/_pytest/skipping.py
+++ b/src/_pytest/skipping.py
@@ -157,9 +157,11 @@ def pytest_runtest_makereport(item, call):
             else:
                 rep.outcome = "passed"
                 rep.wasxfail = explanation
-    elif getattr(item, "_skipped_by_mark", False) and rep.skipped and type(
-        rep.longrepr
-    ) is tuple:
+    elif (
+        getattr(item, "_skipped_by_mark", False)
+        and rep.skipped
+        and type(rep.longrepr) is tuple
+    ):
         # skipped by mark.skipif; change the location of the failure
         # to point to the item definition, otherwise it will display
         # the location of where the skip exception was raised within pytest
@@ -274,7 +276,6 @@ def show_skipped(terminalreporter, lines):
 
 
 def shower(stat, format):
-
     def show_(terminalreporter, lines):
         return show_simple(terminalreporter, lines, stat, format)
 
diff --git a/src/_pytest/terminal.py b/src/_pytest/terminal.py
index 9c4eec7531a..7dd2edd6f9d 100644
--- a/src/_pytest/terminal.py
+++ b/src/_pytest/terminal.py
@@ -220,7 +220,6 @@ def get_location(self, config):
 
 
 class TerminalReporter(object):
-
     def __init__(self, config, file=None):
         import _pytest.config
 
@@ -407,13 +406,16 @@ def pytest_runtest_logreport(self, report):
     def pytest_runtest_logfinish(self, nodeid):
         if self.verbosity <= 0 and self._show_progress_info:
             self._progress_nodeids_reported.add(nodeid)
-            last_item = len(
-                self._progress_nodeids_reported
-            ) == self._session.testscollected
+            last_item = (
+                len(self._progress_nodeids_reported) == self._session.testscollected
+            )
             if last_item:
                 self._write_progress_information_filling_space()
             else:
-                past_edge = self._tw.chars_on_current_line + self._PROGRESS_LENGTH + 1 >= self._screen_width
+                past_edge = (
+                    self._tw.chars_on_current_line + self._PROGRESS_LENGTH + 1
+                    >= self._screen_width
+                )
                 if past_edge:
                     msg = self._get_progress_information_message()
                     self._tw.write(msg + "\n", cyan=True)
@@ -462,8 +464,8 @@ def report_collect(self, final=False):
             line = "collected "
         else:
             line = "collecting "
-        line += str(self._numcollected) + " item" + (
-            "" if self._numcollected == 1 else "s"
+        line += (
+            str(self._numcollected) + " item" + ("" if self._numcollected == 1 else "s")
         )
         if errors:
             line += " / %d errors" % errors
@@ -495,7 +497,9 @@ def pytest_sessionstart(self, session):
             verinfo = ".".join(map(str, sys.pypy_version_info[:3]))
             msg += "[pypy-%s-%s]" % (verinfo, sys.pypy_version_info[3])
         msg += ", pytest-%s, py-%s, pluggy-%s" % (
-            pytest.__version__, py.__version__, pluggy.__version__
+            pytest.__version__,
+            py.__version__,
+            pluggy.__version__,
         )
         if (
             self.verbosity > 0
@@ -563,10 +567,10 @@ def _printcollecteditems(self, items):
         for item in items:
             needed_collectors = item.listchain()[1:]  # strip root node
             while stack:
-                if stack == needed_collectors[:len(stack)]:
+                if stack == needed_collectors[: len(stack)]:
                     break
                 stack.pop()
-            for col in needed_collectors[len(stack):]:
+            for col in needed_collectors[len(stack) :]:
                 stack.append(col)
                 # if col.name == "()":
                 #    continue
@@ -624,11 +628,10 @@ def _report_keyboardinterrupt(self):
                 )
 
     def _locationline(self, nodeid, fspath, lineno, domain):
-
         def mkrel(nodeid):
             line = self.config.cwd_relative_nodeid(nodeid)
             if domain and line.endswith(domain):
-                line = line[:-len(domain)]
+                line = line[: -len(domain)]
                 values = domain.split("[")
                 values[0] = values[0].replace(".", "::")  # don't replace '.' in params
                 line += "[".join(values)
diff --git a/src/_pytest/unittest.py b/src/_pytest/unittest.py
index 6ad9fda8870..d6e7cb27247 100644
--- a/src/_pytest/unittest.py
+++ b/src/_pytest/unittest.py
@@ -163,15 +163,13 @@ def _handle_skip(self):
         # implements the skipping machinery (see #2137)
         # analog to pythons Lib/unittest/case.py:run
         testMethod = getattr(self._testcase, self._testcase._testMethodName)
-        if (
-            getattr(self._testcase.__class__, "__unittest_skip__", False)
-            or getattr(testMethod, "__unittest_skip__", False)
+        if getattr(self._testcase.__class__, "__unittest_skip__", False) or getattr(
+            testMethod, "__unittest_skip__", False
         ):
             # If the class or method was skipped.
-            skip_why = (
-                getattr(self._testcase.__class__, "__unittest_skip_why__", "")
-                or getattr(testMethod, "__unittest_skip_why__", "")
-            )
+            skip_why = getattr(
+                self._testcase.__class__, "__unittest_skip_why__", ""
+            ) or getattr(testMethod, "__unittest_skip_why__", "")
             try:  # PY3, unittest2 on PY2
                 self._testcase._addSkip(self, self._testcase, skip_why)
             except TypeError:  # PY2
diff --git a/src/_pytest/warnings.py b/src/_pytest/warnings.py
index e023d0ab491..abd04801bde 100644
--- a/src/_pytest/warnings.py
+++ b/src/_pytest/warnings.py
@@ -75,9 +75,8 @@ def catch_warnings_for_item(item):
             warn_msg = warning.message
             unicode_warning = False
 
-            if (
-                compat._PY2
-                and any(isinstance(m, compat.UNICODE_TYPES) for m in warn_msg.args)
+            if compat._PY2 and any(
+                isinstance(m, compat.UNICODE_TYPES) for m in warn_msg.args
             ):
                 new_args = []
                 for m in warn_msg.args:
diff --git a/tasks/generate.py b/tasks/generate.py
index 398af70c942..89452aa5c77 100644
--- a/tasks/generate.py
+++ b/tasks/generate.py
@@ -22,16 +22,16 @@ def announce(ctx, version):
 
     contributors = set(stdout.splitlines())
 
-    template_name = "release.minor.rst" if version.endswith(
-        ".0"
-    ) else "release.patch.rst"
-    template_text = Path(__file__).parent.joinpath(template_name).read_text(
-        encoding="UTF-8"
+    template_name = (
+        "release.minor.rst" if version.endswith(".0") else "release.patch.rst"
+    )
+    template_text = (
+        Path(__file__).parent.joinpath(template_name).read_text(encoding="UTF-8")
     )
 
-    contributors_text = "\n".join(
-        "* {}".format(name) for name in sorted(contributors)
-    ) + "\n"
+    contributors_text = (
+        "\n".join("* {}".format(name) for name in sorted(contributors)) + "\n"
+    )
     text = template_text.format(version=version, contributors=contributors_text)
 
     target = Path(__file__).parent.joinpath(
diff --git a/testing/acceptance_test.py b/testing/acceptance_test.py
index c2eed419c9c..88c1f87402e 100644
--- a/testing/acceptance_test.py
+++ b/testing/acceptance_test.py
@@ -13,7 +13,6 @@
 
 
 class TestGeneralUsage(object):
-
     def test_config_error(self, testdir):
         testdir.makeconftest(
             """
@@ -458,7 +457,6 @@ def test_foo(data):
 
 
 class TestInvocationVariants(object):
-
     def test_earlyinit(self, testdir):
         p = testdir.makepyfile(
             """
@@ -557,9 +555,7 @@ def test_invoke_with_path(self, tmpdir, capsys):
         out, err = capsys.readouterr()
 
     def test_invoke_plugin_api(self, testdir, capsys):
-
         class MyPlugin(object):
-
             def pytest_addoption(self, parser):
                 parser.addoption("--myopt")
 
@@ -798,9 +794,10 @@ def test_core_backward_compatibility(self):
         """Test backward compatibility for get_plugin_manager function. See #787."""
         import _pytest.config
 
-        assert type(
-            _pytest.config.get_plugin_manager()
-        ) is _pytest.config.PytestPluginManager
+        assert (
+            type(_pytest.config.get_plugin_manager())
+            is _pytest.config.PytestPluginManager
+        )
 
     def test_has_plugin(self, request):
         """Test hasplugin function of the plugin manager (#932)."""
diff --git a/testing/code/test_code.py b/testing/code/test_code.py
index bfae3691882..e098f136df8 100644
--- a/testing/code/test_code.py
+++ b/testing/code/test_code.py
@@ -26,7 +26,6 @@ def test_code_gives_back_name_for_not_existing_file():
 
 
 def test_code_with_class():
-
     class A(object):
         pass
 
@@ -54,7 +53,6 @@ def test_code_source():
 
 
 def test_frame_getsourcelineno_myself():
-
     def func():
         return sys._getframe(0)
 
@@ -65,7 +63,6 @@ def func():
 
 
 def test_getstatement_empty_fullsource():
-
     def func():
         return sys._getframe(0)
 
@@ -111,7 +108,6 @@ def f():
 
 
 def test_code_getargs():
-
     def f1(x):
         pass
 
@@ -138,7 +134,6 @@ def f4(x, *y, **z):
 
 
 def test_frame_getargs():
-
     def f1(x):
         return sys._getframe(0)
 
@@ -165,7 +160,6 @@ def f4(x, *y, **z):
 
 
 class TestExceptionInfo(object):
-
     def test_bad_getsource(self):
         try:
             if False:
@@ -178,7 +172,6 @@ def test_bad_getsource(self):
 
 
 class TestTracebackEntry(object):
-
     def test_getsource(self):
         try:
             if False:
@@ -194,7 +187,6 @@ def test_getsource(self):
 
 
 class TestReprFuncArgs(object):
-
     def test_not_raise_exception_with_mixed_encoding(self):
         from _pytest._code.code import ReprFuncArgs
 
diff --git a/testing/code/test_excinfo.py b/testing/code/test_excinfo.py
index f4044b6ecc4..4bac7ba4c00 100644
--- a/testing/code/test_excinfo.py
+++ b/testing/code/test_excinfo.py
@@ -65,7 +65,6 @@ def test_excinfo_simple():
 
 
 def test_excinfo_getstatement():
-
     def g():
         raise ValueError
 
@@ -112,7 +111,6 @@ def h():
 
 
 class TestTraceback_f_g_h(object):
-
     def setup_method(self, method):
         try:
             h()
@@ -194,7 +192,6 @@ def test_traceback_filter(self):
         ],
     )
     def test_traceback_filter_selective(self, tracebackhide, matching):
-
         def f():
             #
             raise ValueError
@@ -224,7 +221,6 @@ def h():
             assert len(ntraceback) == len(traceback) - 1
 
     def test_traceback_recursion_index(self):
-
         def f(n):
             if n < 10:
                 n += 1
@@ -236,7 +232,6 @@ def f(n):
         assert recindex == 3
 
     def test_traceback_only_specific_recursion_errors(self, monkeypatch):
-
         def f(n):
             if n == 0:
                 raise RuntimeError("hello")
@@ -248,7 +243,6 @@ def f(n):
         assert "RuntimeError: hello" in str(repr.reprcrash)
 
     def test_traceback_no_recursion_index(self):
-
         def do_stuff():
             raise RuntimeError
 
@@ -288,7 +282,6 @@ def fail():
         assert excinfo.traceback.recursionindex() is None
 
     def test_traceback_getcrashentry(self):
-
         def i():
             __tracebackhide__ = True
             raise ValueError
@@ -312,7 +305,6 @@ def f():
         assert entry.frame.code.name == "h"
 
     def test_traceback_getcrashentry_empty(self):
-
         def g():
             __tracebackhide__ = True
             raise ValueError
@@ -429,10 +421,8 @@ def test_division_zero():
 
 
 class TestFormattedExcinfo(object):
-
     @pytest.fixture
     def importasmod(self, request):
-
         def importasmod(source):
             source = _pytest._code.Source(source)
             tmpdir = request.getfixturevalue("tmpdir")
@@ -519,7 +509,6 @@ def test_repr_source_failing_fullsource(self):
         pr = FormattedExcinfo()
 
         class FakeCode(object):
-
             class raw(object):
                 co_filename = "?"
 
@@ -537,7 +526,6 @@ class FakeFrame(object):
             f_globals = {}
 
         class FakeTracebackEntry(_pytest._code.Traceback.Entry):
-
             def __init__(self, tb, excinfo=None):
                 self.lineno = 5 + 3
 
@@ -882,7 +870,6 @@ def test_reprexcinfo_unicode(self):
         from _pytest._code.code import TerminalRepr
 
         class MyRepr(TerminalRepr):
-
             def toterminal(self, tw):
                 tw.line(py.builtin._totext("я", "utf-8"))
 
@@ -1303,7 +1290,6 @@ def test_exception_repr_extraction_error_on_recursion():
     """
 
     class numpy_like(object):
-
         def __eq__(self, other):
             if type(other) is numpy_like:
                 raise ValueError(
@@ -1343,7 +1329,6 @@ def test_no_recursion_index_on_recursion_error():
     try:
 
         class RecursionDepthError(object):
-
             def __getattr__(self, attr):
                 return getattr(self, "_" + attr)
 
diff --git a/testing/code/test_source.py b/testing/code/test_source.py
index 56dad75671f..7982cfa352e 100644
--- a/testing/code/test_source.py
+++ b/testing/code/test_source.py
@@ -58,9 +58,7 @@ def test_source_from_function():
 
 
 def test_source_from_method():
-
     class TestClass(object):
-
         def test_method(self):
             pass
 
@@ -75,7 +73,6 @@ def test_source_from_lines():
 
 
 def test_source_from_inner_function():
-
     def f():
         pass
 
@@ -199,7 +196,6 @@ def test_compile_and_getsource_simple(self):
         assert str(source) == "x=3"
 
     def test_compile_and_getsource_through_same_function(self):
-
         def gensource(source):
             return _pytest._code.compile(source)
 
@@ -337,13 +333,12 @@ def test_compile_and_getsource(self):
 
     @pytest.mark.parametrize("name", ["", None, "my"])
     def test_compilefuncs_and_path_sanity(self, name):
-
         def check(comp, name):
             co = comp(self.source, name)
             if not name:
-                expected = "codegen %s:%d>" % (mypath, mylineno + 2 + 3)
+                expected = "codegen %s:%d>" % (mypath, mylineno + 2 + 2)
             else:
-                expected = "codegen %r %s:%d>" % (name, mypath, mylineno + 2 + 3)
+                expected = "codegen %r %s:%d>" % (name, mypath, mylineno + 2 + 2)
             fn = co.co_filename
             assert fn.endswith(expected)
 
@@ -359,9 +354,7 @@ def test_offsetless_synerr(self):
 
 
 def test_getstartingblock_singleline():
-
     class A(object):
-
         def __init__(self, *args):
             frame = sys._getframe(1)
             self.source = _pytest._code.Frame(frame).statement
@@ -373,7 +366,6 @@ def __init__(self, *args):
 
 
 def test_getline_finally():
-
     def c():
         pass
 
@@ -406,7 +398,6 @@ def g(): pass
 
 
 def test_getfuncsource_with_multine_string():
-
     def f():
         c = """while True:
     pass
@@ -538,14 +529,12 @@ class B(object):
 
 
 def test_code_of_object_instance_with_call():
-
     class A(object):
         pass
 
     pytest.raises(TypeError, lambda: _pytest._code.Source(A()))
 
     class WithCall(object):
-
         def __call__(self):
             pass
 
@@ -553,7 +542,6 @@ def __call__(self):
     assert "pass" in str(code.source())
 
     class Hello(object):
-
         def __call__(self):
             pass
 
diff --git a/testing/code/test_source_multiline_block.py b/testing/code/test_source_multiline_block.py
index 92f7412eb8c..009bb87aeea 100644
--- a/testing/code/test_source_multiline_block.py
+++ b/testing/code/test_source_multiline_block.py
@@ -14,7 +14,6 @@ def test_getstartingblock_multiline():
     """
 
     class A(object):
-
         def __init__(self, *args):
             frame = sys._getframe(1)
             self.source = _pytest._code.Frame(frame).statement
diff --git a/testing/deprecated_test.py b/testing/deprecated_test.py
index 39ff1f1fc38..b82dbcf7d85 100644
--- a/testing/deprecated_test.py
+++ b/testing/deprecated_test.py
@@ -84,7 +84,6 @@ def test_str_args_deprecated(tmpdir, testdir):
     warnings = []
 
     class Collect(object):
-
         def pytest_logwarning(self, message):
             warnings.append(message)
 
@@ -260,6 +259,7 @@ def test_func():
     )
     res = testdir.runpytest_subprocess()
     assert res.ret == 0
-    assert str(PYTEST_PLUGINS_FROM_NON_TOP_LEVEL_CONFTEST).splitlines()[
-        0
-    ] not in res.stderr.str()
+    assert (
+        str(PYTEST_PLUGINS_FROM_NON_TOP_LEVEL_CONFTEST).splitlines()[0]
+        not in res.stderr.str()
+    )
diff --git a/testing/logging/test_formatter.py b/testing/logging/test_formatter.py
index ca2a4106537..0348b215cec 100644
--- a/testing/logging/test_formatter.py
+++ b/testing/logging/test_formatter.py
@@ -18,7 +18,6 @@ def test_coloredlogformatter():
     )
 
     class ColorConfig(object):
-
         class option(object):
             pass
 
@@ -26,9 +25,8 @@ class option(object):
     tw.hasmarkup = True
     formatter = ColoredLevelFormatter(tw, logfmt)
     output = formatter.format(record)
-    assert (
-        output
-        == ("dummypath                   10 " "\x1b[32mINFO    \x1b[0m Test Message")
+    assert output == (
+        "dummypath                   10 " "\x1b[32mINFO    \x1b[0m Test Message"
     )
 
     tw.hasmarkup = False
diff --git a/testing/logging/test_reporting.py b/testing/logging/test_reporting.py
index 91ed2e4758c..0a8a585063c 100644
--- a/testing/logging/test_reporting.py
+++ b/testing/logging/test_reporting.py
@@ -520,16 +520,22 @@ def test_log_1(fix):
             "=* 1 passed in *=",
         ]
     )
-    assert re.search(
-        r"(.+)live log teardown(.+)\n(.+)WARNING(.+)\n(.+)WARNING(.+)",
-        result.stdout.str(),
-        re.MULTILINE,
-    ) is not None
-    assert re.search(
-        r"(.+)live log finish(.+)\n(.+)WARNING(.+)\n(.+)WARNING(.+)",
-        result.stdout.str(),
-        re.MULTILINE,
-    ) is not None
+    assert (
+        re.search(
+            r"(.+)live log teardown(.+)\n(.+)WARNING(.+)\n(.+)WARNING(.+)",
+            result.stdout.str(),
+            re.MULTILINE,
+        )
+        is not None
+    )
+    assert (
+        re.search(
+            r"(.+)live log finish(.+)\n(.+)WARNING(.+)\n(.+)WARNING(.+)",
+            result.stdout.str(),
+            re.MULTILINE,
+        )
+        is not None
+    )
 
 
 def test_log_cli_level(testdir):
@@ -850,7 +856,6 @@ def resume_global_capture(self):
     assert CaptureManager.resume_global_capture
 
     class DummyTerminal(six.StringIO):
-
         def section(self, *args, **kwargs):
             pass
 
@@ -865,10 +870,10 @@ def section(self, *args, **kwargs):
 
     logger.critical("some message")
     if has_capture_manager:
-        assert (
-            MockCaptureManager.calls
-            == ["suspend_global_capture", "resume_global_capture"]
-        )
+        assert MockCaptureManager.calls == [
+            "suspend_global_capture",
+            "resume_global_capture",
+        ]
     else:
         assert MockCaptureManager.calls == []
     assert out_file.getvalue() == "\nsome message\n"
diff --git a/testing/python/approx.py b/testing/python/approx.py
index e6564789714..39f10a82116 100644
--- a/testing/python/approx.py
+++ b/testing/python/approx.py
@@ -13,7 +13,6 @@
 
 
 class MyDocTestRunner(doctest.DocTestRunner):
-
     def __init__(self):
         doctest.DocTestRunner.__init__(self)
 
@@ -26,7 +25,6 @@ def report_failure(self, out, test, example, got):
 
 
 class TestApprox(object):
-
     @pytest.fixture
     def plus_minus(self):
         return u"\u00b1" if sys.version_info[0] > 2 else u"+-"
@@ -34,23 +32,20 @@ def plus_minus(self):
     def test_repr_string(self, plus_minus):
         tol1, tol2, infr = "1.0e-06", "2.0e-06", "inf"
         assert repr(approx(1.0)) == "1.0 {pm} {tol1}".format(pm=plus_minus, tol1=tol1)
-        assert (
-            repr(approx([1.0, 2.0]))
-            == "approx([1.0 {pm} {tol1}, 2.0 {pm} {tol2}])".format(
-                pm=plus_minus, tol1=tol1, tol2=tol2
-            )
+        assert repr(
+            approx([1.0, 2.0])
+        ) == "approx([1.0 {pm} {tol1}, 2.0 {pm} {tol2}])".format(
+            pm=plus_minus, tol1=tol1, tol2=tol2
         )
-        assert (
-            repr(approx((1.0, 2.0)))
-            == "approx((1.0 {pm} {tol1}, 2.0 {pm} {tol2}))".format(
-                pm=plus_minus, tol1=tol1, tol2=tol2
-            )
+        assert repr(
+            approx((1.0, 2.0))
+        ) == "approx((1.0 {pm} {tol1}, 2.0 {pm} {tol2}))".format(
+            pm=plus_minus, tol1=tol1, tol2=tol2
         )
         assert repr(approx(inf)) == "inf"
         assert repr(approx(1.0, rel=nan)) == "1.0 {pm} ???".format(pm=plus_minus)
-        assert (
-            repr(approx(1.0, rel=inf))
-            == "1.0 {pm} {infr}".format(pm=plus_minus, infr=infr)
+        assert repr(approx(1.0, rel=inf)) == "1.0 {pm} {infr}".format(
+            pm=plus_minus, infr=infr
         )
         assert repr(approx(1.0j, rel=inf)) == "1j"
 
diff --git a/testing/python/collect.py b/testing/python/collect.py
index 724504b1af7..46694f2d8e6 100644
--- a/testing/python/collect.py
+++ b/testing/python/collect.py
@@ -14,7 +14,6 @@
 
 
 class TestModule(object):
-
     def test_failing_import(self, testdir):
         modcol = testdir.getmodulecol("import alksdjalskdjalkjals")
         pytest.raises(Collector.CollectError, modcol.collect)
@@ -141,7 +140,6 @@ def test_show_traceback_import_error_unicode(self, testdir):
 
 
 class TestClass(object):
-
     def test_class_with_init_warning(self, testdir):
         testdir.makepyfile(
             """
@@ -246,7 +244,6 @@ def prop(self):
 
 
 class TestGenerator(object):
-
     def test_generative_functions(self, testdir):
         modcol = testdir.getmodulecol(
             """
@@ -458,7 +455,6 @@ def test_setuplist():
 
 
 class TestFunction(object):
-
     def test_getmodulecollector(self, testdir):
         item = testdir.getitem("def test_func(): pass")
         modcol = item.getparent(pytest.Module)
@@ -673,12 +669,10 @@ def test_pyfunc_call(self, testdir):
         config = item.config
 
         class MyPlugin1(object):
-
             def pytest_pyfunc_call(self, pyfuncitem):
                 raise ValueError
 
         class MyPlugin2(object):
-
             def pytest_pyfunc_call(self, pyfuncitem):
                 return True
 
@@ -831,7 +825,6 @@ def test_func(arg):
 
 
 class TestSorting(object):
-
     def test_check_equality(self, testdir):
         modcol = testdir.getmodulecol(
             """
@@ -886,7 +879,6 @@ def test_a(y):
 
 
 class TestConftestCustomization(object):
-
     def test_pytest_pycollect_module(self, testdir):
         testdir.makeconftest(
             """
@@ -1062,7 +1054,6 @@ def test_modulecol_roundtrip(testdir):
 
 
 class TestTracebackCutting(object):
-
     def test_skip_simple(self):
         excinfo = pytest.raises(pytest.skip.Exception, 'pytest.skip("xxx")')
         assert excinfo.traceback[-1].frame.code.name == "skip"
@@ -1191,7 +1182,6 @@ def foo():
 
 
 class TestReportInfo(object):
-
     def test_itemreport_reportinfo(self, testdir, linecomp):
         testdir.makeconftest(
             """
@@ -1497,7 +1487,10 @@ def test_injection(self):
     '''
     )
     result = testdir.runpytest()
-    assert "RuntimeError: dictionary changed size during iteration" not in result.stdout.str()
+    assert (
+        "RuntimeError: dictionary changed size during iteration"
+        not in result.stdout.str()
+    )
     result.stdout.fnmatch_lines(["*1 passed*"])
 
 
diff --git a/testing/python/fixture.py b/testing/python/fixture.py
index 6d2bb663b6c..9cc3b6890f2 100644
--- a/testing/python/fixture.py
+++ b/testing/python/fixture.py
@@ -8,7 +8,6 @@
 
 
 def test_getfuncargnames():
-
     def f():
         pass
 
@@ -30,7 +29,6 @@ def h(arg1, arg2, arg3="hello"):
     assert fixtures.getfuncargnames(h) == ("arg1", "arg2")
 
     class A(object):
-
         def f(self, arg1, arg2="hello"):
             pass
 
@@ -43,7 +41,6 @@ def static(arg1, arg2):
 
 
 class TestFillFixtures(object):
-
     def test_fillfuncargs_exposed(self):
         # used by oejskit, kept for compatibility
         assert pytest._fillfuncargs == fixtures.fillfixtures
@@ -570,7 +567,6 @@ def test_leak(leak):
 
 
 class TestRequestBasic(object):
-
     def test_request_attributes(self, testdir):
         item = testdir.getitem(
             """
@@ -1003,7 +999,6 @@ def test_1(arg):
 
 
 class TestRequestMarking(object):
-
     def test_applymarker(self, testdir):
         item1, item2 = testdir.getitems(
             """
@@ -1073,7 +1068,6 @@ def test_fun2(keywords):
 
 
 class TestRequestCachedSetup(object):
-
     def test_request_cachedsetup_defaultmodule(self, testdir):
         reprec = testdir.inline_runsource(
             """
@@ -1245,7 +1239,6 @@ def test_func(app):
 
 
 class TestFixtureUsages(object):
-
     def test_noargfixturedec(self, testdir):
         testdir.makepyfile(
             """
@@ -1540,7 +1533,6 @@ def test_2(arg2):
 
 
 class TestFixtureManagerParseFactories(object):
-
     @pytest.fixture
     def testdir(self, request):
         testdir = request.getfixturevalue("testdir")
@@ -1668,7 +1660,6 @@ def test_x(one):
 
 
 class TestAutouseDiscovery(object):
-
     @pytest.fixture
     def testdir(self, testdir):
         testdir.makeconftest(
@@ -1845,7 +1836,6 @@ def test_world(self):
 
 
 class TestAutouseManagement(object):
-
     def test_autouse_conftest_mid_directory(self, testdir):
         pkgdir = testdir.mkpydir("xyz123")
         pkgdir.join("conftest.py").write(
@@ -2112,7 +2102,6 @@ def test_check():
 
 
 class TestFixtureMarker(object):
-
     def test_parametrize(self, testdir):
         testdir.makepyfile(
             """
@@ -2938,21 +2927,18 @@ def test_population(self, human):
         reprec = testdir.inline_run()
         reprec.assertoutcome(passed=6)
         values = reprec.getcalls("pytest_runtest_call")[0].item.module.values
-        assert (
-            values
-            == [
-                "test_hello",
-                "fin John",
-                "test_hello",
-                "fin Doe",
-                "test_name",
-                "test_population",
-                "fin John",
-                "test_name",
-                "test_population",
-                "fin Doe",
-            ]
-        )
+        assert values == [
+            "test_hello",
+            "fin John",
+            "test_hello",
+            "fin Doe",
+            "test_name",
+            "test_population",
+            "fin John",
+            "test_name",
+            "test_population",
+            "fin Doe",
+        ]
 
     def test_parametrize_setup_function(self, testdir):
         testdir.makepyfile(
@@ -3135,7 +3121,6 @@ def test_func(arg):
 
 
 class TestErrors(object):
-
     def test_subfactory_missing_funcarg(self, testdir):
         testdir.makepyfile(
             """
@@ -3203,7 +3188,6 @@ def test_something():
 
 
 class TestShowFixtures(object):
-
     def test_funcarg_compat(self, testdir):
         config = testdir.parseconfigure("--funcargs")
         assert config.option.showfixtures
@@ -3480,7 +3464,6 @@ def foo():
 
 @pytest.mark.parametrize("flavor", ["fixture", "yield_fixture"])
 class TestContextManagerFixtureFuncs(object):
-
     def test_simple(self, testdir, flavor):
         testdir.makepyfile(
             """
@@ -3622,7 +3605,6 @@ def test_1(meow):
 
 
 class TestParameterizedSubRequest(object):
-
     def test_call_from_fixture(self, testdir):
         testfile = testdir.makepyfile(
             """
diff --git a/testing/python/integration.py b/testing/python/integration.py
index f348fdc29fd..a6fb93bfb40 100644
--- a/testing/python/integration.py
+++ b/testing/python/integration.py
@@ -4,7 +4,6 @@
 
 
 class TestOEJSKITSpecials(object):
-
     def test_funcarg_non_pycollectobj(self, testdir):  # rough jstests usage
         testdir.makeconftest(
             """
@@ -70,7 +69,6 @@ class MyClass(object):
 
 
 def test_wrapped_getfslineno():
-
     def func():
         pass
 
@@ -89,12 +87,10 @@ def wrapped_func(x, y, z):
 
 
 class TestMockDecoration(object):
-
     def test_wrapped_getfuncargnames(self):
         from _pytest.compat import getfuncargnames
 
         def wrap(f):
-
             def func():
                 pass
 
@@ -115,7 +111,6 @@ def test_wrapped_getfuncargnames_patching(self):
         from _pytest.compat import getfuncargnames
 
         def wrap(f):
-
             def func():
                 pass
 
@@ -269,7 +264,6 @@ def test_simple_thing(self, mock_path, mock_getcwd):
 
 
 class TestReRunTests(object):
-
     def test_rerun(self, testdir):
         testdir.makeconftest(
             """
@@ -316,7 +310,6 @@ def test_pytestconfig_is_session_scoped():
 
 
 class TestNoselikeTestAttribute(object):
-
     def test_module_with_global_test(self, testdir):
         testdir.makepyfile(
             """
@@ -402,7 +395,6 @@ def test_blah(self):
 
 @pytest.mark.issue351
 class TestParameterize(object):
-
     def test_idfn_marker(self, testdir):
         testdir.makepyfile(
             """
diff --git a/testing/python/metafunc.py b/testing/python/metafunc.py
index e181d3131f5..9f425821b67 100644
--- a/testing/python/metafunc.py
+++ b/testing/python/metafunc.py
@@ -14,7 +14,6 @@
 
 
 class TestMetafunc(object):
-
     def Metafunc(self, func, config=None):
         # the unit tests of this class check if things work correctly
         # on the funcarg level, so we don't need a full blown
@@ -35,7 +34,6 @@ class DefinitionMock(object):
         return python.Metafunc(definition, fixtureinfo, config)
 
     def test_no_funcargs(self, testdir):
-
         def function():
             pass
 
@@ -44,7 +42,6 @@ def function():
         repr(metafunc._calls)
 
     def test_function_basic(self):
-
         def func(arg1, arg2="qwe"):
             pass
 
@@ -55,7 +52,6 @@ def func(arg1, arg2="qwe"):
         assert metafunc.cls is None
 
     def test_addcall_no_args(self):
-
         def func(arg1):
             pass
 
@@ -67,7 +63,6 @@ def func(arg1):
         assert not hasattr(call, "param")
 
     def test_addcall_id(self):
-
         def func(arg1):
             pass
 
@@ -83,7 +78,6 @@ def func(arg1):
         assert metafunc._calls[1].id == "2"
 
     def test_addcall_param(self):
-
         def func(arg1):
             pass
 
@@ -101,7 +95,6 @@ class obj(object):
         assert metafunc._calls[2].getparam("arg1") == 1
 
     def test_addcall_funcargs(self):
-
         def func(x):
             pass
 
@@ -119,7 +112,6 @@ class obj(object):
         assert not hasattr(metafunc._calls[1], "param")
 
     def test_parametrize_error(self):
-
         def func(x, y):
             pass
 
@@ -132,7 +124,6 @@ def func(x, y):
         pytest.raises(ValueError, lambda: metafunc.parametrize("y", [5, 6]))
 
     def test_parametrize_bad_scope(self, testdir):
-
         def func(x):
             pass
 
@@ -143,7 +134,6 @@ def func(x):
             assert "has an unsupported scope value 'doggy'" in str(ve)
 
     def test_parametrize_and_id(self):
-
         def func(x, y):
             pass
 
@@ -166,7 +156,6 @@ def func(x):
         assert ids == [u"basic", u"advanced"]
 
     def test_parametrize_with_wrong_number_of_ids(self, testdir):
-
         def func(x, y):
             pass
 
@@ -185,12 +174,10 @@ def func(x, y):
 
     @pytest.mark.issue510
     def test_parametrize_empty_list(self):
-
         def func(y):
             pass
 
         class MockConfig(object):
-
             def getini(self, name):
                 return ""
 
@@ -206,7 +193,6 @@ def pytest_make_parametrize_id(self, **kw):
         assert "skip" == metafunc._calls[0].marks[0].name
 
     def test_parametrize_with_userobjects(self):
-
         def func(x, y):
             pass
 
@@ -338,23 +324,20 @@ def test_idmaker_native_strings(self):
                 pytest.param(b"\xc3\xb4", totext("other")),
             ],
         )
-        assert (
-            result
-            == [
-                "1.0--1.1",
-                "2--202",
-                "three-three hundred",
-                "True-False",
-                "None-None",
-                "foo-bar",
-                "str-int",
-                "a7-b7",
-                "a8-b8",
-                "a9-b9",
-                "\\xc3\\xb4-name",
-                "\\xc3\\xb4-other",
-            ]
-        )
+        assert result == [
+            "1.0--1.1",
+            "2--202",
+            "three-three hundred",
+            "True-False",
+            "None-None",
+            "foo-bar",
+            "str-int",
+            "a7-b7",
+            "a8-b8",
+            "a9-b9",
+            "\\xc3\\xb4-name",
+            "\\xc3\\xb4-other",
+        ]
 
     def test_idmaker_enum(self):
         from _pytest.python import idmaker
@@ -424,23 +407,20 @@ def ids(val):
                 idfn=ids,
             )
 
-        assert (
-            [str(i.message) for i in rec.list]
-            == [
-                "Raised while trying to determine id of parameter a at position 0."
-                "\nUpdate your code as this will raise an error in pytest-4.0.",
-                "Raised while trying to determine id of parameter b at position 0."
-                "\nUpdate your code as this will raise an error in pytest-4.0.",
-                "Raised while trying to determine id of parameter a at position 1."
-                "\nUpdate your code as this will raise an error in pytest-4.0.",
-                "Raised while trying to determine id of parameter b at position 1."
-                "\nUpdate your code as this will raise an error in pytest-4.0.",
-                "Raised while trying to determine id of parameter a at position 2."
-                "\nUpdate your code as this will raise an error in pytest-4.0.",
-                "Raised while trying to determine id of parameter b at position 2."
-                "\nUpdate your code as this will raise an error in pytest-4.0.",
-            ]
-        )
+        assert [str(i.message) for i in rec.list] == [
+            "Raised while trying to determine id of parameter a at position 0."
+            "\nUpdate your code as this will raise an error in pytest-4.0.",
+            "Raised while trying to determine id of parameter b at position 0."
+            "\nUpdate your code as this will raise an error in pytest-4.0.",
+            "Raised while trying to determine id of parameter a at position 1."
+            "\nUpdate your code as this will raise an error in pytest-4.0.",
+            "Raised while trying to determine id of parameter b at position 1."
+            "\nUpdate your code as this will raise an error in pytest-4.0.",
+            "Raised while trying to determine id of parameter a at position 2."
+            "\nUpdate your code as this will raise an error in pytest-4.0.",
+            "Raised while trying to determine id of parameter b at position 2."
+            "\nUpdate your code as this will raise an error in pytest-4.0.",
+        ]
 
     def test_parametrize_ids_exception(self, testdir):
         """
@@ -496,7 +476,6 @@ def test_idmaker_with_ids_unique_names(self):
         assert result == ["a0", "a1", "b0", "c", "b1"]
 
     def test_addcall_and_parametrize(self):
-
         def func(x, y):
             pass
 
@@ -511,7 +490,6 @@ def func(x, y):
 
     @pytest.mark.issue714
     def test_parametrize_indirect(self):
-
         def func(x, y):
             pass
 
@@ -526,7 +504,6 @@ def func(x, y):
 
     @pytest.mark.issue714
     def test_parametrize_indirect_list(self):
-
         def func(x, y):
             pass
 
@@ -537,7 +514,6 @@ def func(x, y):
 
     @pytest.mark.issue714
     def test_parametrize_indirect_list_all(self):
-
         def func(x, y):
             pass
 
@@ -548,7 +524,6 @@ def func(x, y):
 
     @pytest.mark.issue714
     def test_parametrize_indirect_list_empty(self):
-
         def func(x, y):
             pass
 
@@ -588,7 +563,6 @@ def test_simple(x,y):
 
     @pytest.mark.issue714
     def test_parametrize_indirect_list_error(self, testdir):
-
         def func(x, y):
             pass
 
@@ -704,7 +678,6 @@ def test_simple(x, y=1):
         )
 
     def test_addcalls_and_parametrize_indirect(self):
-
         def func(x, y):
             pass
 
@@ -837,7 +810,6 @@ def test_3(self, arg, arg2):
         )
 
     def test_format_args(self):
-
         def function1():
             pass
 
@@ -860,7 +832,6 @@ def function4(arg1, *args, **kwargs):
 
 
 class TestMetafuncFunctional(object):
-
     def test_attributes(self, testdir):
         p = testdir.makepyfile(
             """
@@ -1494,7 +1465,6 @@ def pytest_generate_tests(metafunc):
 @pytest.mark.filterwarnings("ignore:Applying marks directly to parameters")
 @pytest.mark.issue308
 class TestMarkersWithParametrization(object):
-
     def test_simple_mark(self, testdir):
         s = """
             import pytest
diff --git a/testing/python/raises.py b/testing/python/raises.py
index 64199c3b6f5..99aeffdf279 100644
--- a/testing/python/raises.py
+++ b/testing/python/raises.py
@@ -4,7 +4,6 @@
 
 
 class TestRaises(object):
-
     def test_raises(self):
         source = "int('qwe')"
         excinfo = pytest.raises(ValueError, source)
@@ -22,9 +21,7 @@ def test_raises_function(self):
         pytest.raises(ValueError, int, "hello")
 
     def test_raises_callable_no_exception(self):
-
         class A(object):
-
             def __call__(self):
                 pass
 
@@ -109,7 +106,6 @@ def test_raises_cyclic_reference(self, method):
         import gc
 
         class T(object):
-
             def __call__(self):
                 raise ValueError
 
@@ -160,7 +156,6 @@ def test_raises_exception_looks_iterable(self):
         from six import add_metaclass
 
         class Meta(type(object)):
-
             def __getitem__(self, item):
                 return 1 / 0
 
diff --git a/testing/test_argcomplete.py b/testing/test_argcomplete.py
index b042de5ce5b..9e6b711a25d 100644
--- a/testing/test_argcomplete.py
+++ b/testing/test_argcomplete.py
@@ -86,7 +86,6 @@ def __call__(self, prefix, **kwargs):
 
 
 class TestArgComplete(object):
-
     @pytest.mark.skipif("sys.platform in ('win32', 'darwin')")
     def test_compare_with_compgen(self):
         from _pytest._argcomplete import FastFilesCompleter
diff --git a/testing/test_assertion.py b/testing/test_assertion.py
index 393cf817c7e..aff644ee7d0 100644
--- a/testing/test_assertion.py
+++ b/testing/test_assertion.py
@@ -14,7 +14,6 @@
 
 @pytest.fixture
 def mock_config():
-
     class Config(object):
         verbose = False
 
@@ -27,7 +26,6 @@ def getoption(self, name):
 
 
 class TestImportHookInstallation(object):
-
     @pytest.mark.parametrize("initial_conftest", [True, False])
     @pytest.mark.parametrize("mode", ["plain", "rewrite"])
     def test_conftest_assertion_rewrite(self, testdir, initial_conftest, mode):
@@ -288,7 +286,6 @@ def test_register_assert_rewrite_checks_types(self):
 
 
 class TestBinReprIntegration(object):
-
     def test_pytest_assertrepr_compare_called(self, testdir):
         testdir.makeconftest(
             """
@@ -321,7 +318,6 @@ def callequal(left, right, verbose=False):
 
 
 class TestAssert_reprcompare(object):
-
     def test_different_types(self):
         assert callequal([0, 1], "foo") is None
 
@@ -459,7 +455,6 @@ def test_Sequence(self):
         MutableSequence = col.MutableSequence
 
         class TestSequence(MutableSequence):  # works with a Sequence subclass
-
             def __init__(self, iterable):
                 self.elements = list(iterable)
 
@@ -488,9 +483,7 @@ def test_list_tuples(self):
         assert len(expl) > 1
 
     def test_list_bad_repr(self):
-
         class A(object):
-
             def __repr__(self):
                 raise ValueError(42)
 
@@ -506,7 +499,6 @@ def test_one_repr_empty(self):
         """
 
         class A(str):
-
             def __repr__(self):
                 return ""
 
@@ -532,7 +524,6 @@ def test_nonascii_text(self):
         """
 
         class A(str):
-
             def __repr__(self):
                 return "\xff"
 
@@ -557,7 +548,6 @@ def test_mojibake(self):
 
 
 class TestFormatExplanation(object):
-
     def test_special_chars_full(self, testdir):
         # Issue 453, for the bug this would raise IndexError
         testdir.makepyfile(
@@ -781,24 +771,19 @@ def test_rewritten():
 def test_reprcompare_notin(mock_config):
     detail = plugin.pytest_assertrepr_compare(
         mock_config, "not in", "foo", "aaafoobbb"
-    )[
-        1:
-    ]
+    )[1:]
     assert detail == ["'foo' is contained here:", "  aaafoobbb", "?    +++"]
 
 
 def test_reprcompare_whitespaces(mock_config):
     detail = plugin.pytest_assertrepr_compare(mock_config, "==", "\r\n", "\n")
-    assert (
-        detail
-        == [
-            r"'\r\n' == '\n'",
-            r"Strings contain only whitespace, escaping them using repr()",
-            r"- '\r\n'",
-            r"?  --",
-            r"+ '\n'",
-        ]
-    )
+    assert detail == [
+        r"'\r\n' == '\n'",
+        r"Strings contain only whitespace, escaping them using repr()",
+        r"- '\r\n'",
+        r"?  --",
+        r"+ '\n'",
+    ]
 
 
 def test_pytest_assertrepr_compare_integration(testdir):
@@ -1036,7 +1021,6 @@ def test_hello():
 def test_set_with_unsortable_elements():
     # issue #718
     class UnsortableKey(object):
-
         def __init__(self, name):
             self.name = name
 
@@ -1169,4 +1153,7 @@ def f():
     )
     result = testdir.runpytest()
     result.stdout.fnmatch_lines(["*1 error*"])
-    assert "AttributeError: 'Module' object has no attribute '_obj'" not in result.stdout.str()
+    assert (
+        "AttributeError: 'Module' object has no attribute '_obj'"
+        not in result.stdout.str()
+    )
diff --git a/testing/test_assertrewrite.py b/testing/test_assertrewrite.py
index 144f625bc6c..20cc476d894 100644
--- a/testing/test_assertrewrite.py
+++ b/testing/test_assertrewrite.py
@@ -78,9 +78,8 @@ def adjust_body_for_new_docstring_in_module_node(m):
     various Python 3.7 versions, but we should remove the 3.7 check after
     3.7 is released as stable to make this check more straightforward.
     """
-    if (
-        sys.version_info < (3, 8)
-        and not ((3, 7) <= sys.version_info <= (3, 7, 0, "beta", 4))
+    if sys.version_info < (3, 8) and not (
+        (3, 7) <= sys.version_info <= (3, 7, 0, "beta", 4)
     ):
         assert len(m.body) > 1
         assert isinstance(m.body[0], ast.Expr)
@@ -89,7 +88,6 @@ def adjust_body_for_new_docstring_in_module_node(m):
 
 
 class TestAssertionRewrite(object):
-
     def test_place_initial_imports(self):
         s = """'Doc string'\nother = stuff"""
         m = rewrite(s)
@@ -150,7 +148,6 @@ def test_dont_rewrite_plugin(self, testdir):
         assert "warnings" not in "".join(result.outlines)
 
     def test_name(self):
-
         def f():
             assert False
 
@@ -181,7 +178,6 @@ class X(object):
         assert getmsg(f, {"cls": X}) == "assert cls == 42"
 
     def test_assert_already_has_message(self):
-
         def f():
             assert False, "something bad!"
 
@@ -251,7 +247,6 @@ def test_foo():
         )
 
     def test_boolop(self):
-
         def f():
             f = g = False
             assert f and g
@@ -331,7 +326,6 @@ def f():
         getmsg(f, must_pass=True)
 
     def test_short_circuit_evaluation(self):
-
         def f():
             assert True or explode  # noqa
 
@@ -344,7 +338,6 @@ def f():
         getmsg(f, must_pass=True)
 
     def test_unary_op(self):
-
         def f():
             x = True
             assert not x
@@ -370,7 +363,6 @@ def f():
         assert getmsg(f) == "assert (+0 + 0)"
 
     def test_binary_op(self):
-
         def f():
             x = 1
             y = -1
@@ -384,7 +376,6 @@ def f():
         assert getmsg(f) == "assert not (5 % 4)"
 
     def test_boolop_percent(self):
-
         def f():
             assert 3 % 2 and False
 
@@ -411,7 +402,6 @@ def test_multmat_operator():
         testdir.runpytest().assert_outcomes(passed=1)
 
     def test_call(self):
-
         def g(a=42, *args, **kwargs):
             return False
 
@@ -483,7 +473,6 @@ def f():
         )
 
     def test_attribute(self):
-
         class X(object):
             g = 3
 
@@ -509,7 +498,6 @@ def f():
         )
 
     def test_comparisons(self):
-
         def f():
             a, b = range(2)
             assert b < a
@@ -542,7 +530,6 @@ def f():
         getmsg(f, must_pass=True)
 
     def test_len(self):
-
         def f():
             values = list(range(10))
             assert len(values) == 11
@@ -553,7 +540,6 @@ def f():
         )
 
     def test_custom_reprcompare(self, monkeypatch):
-
         def my_reprcompare(op, left, right):
             return "42"
 
@@ -575,11 +561,8 @@ def f():
         assert getmsg(f) == "assert 5 <= 4"
 
     def test_assert_raising_nonzero_in_comparison(self):
-
         def f():
-
             class A(object):
-
                 def __nonzero__(self):
                     raise ValueError(42)
 
@@ -597,16 +580,13 @@ def myany(x):
         assert "<MY42 object> < 0" in getmsg(f)
 
     def test_formatchar(self):
-
         def f():
             assert "%test" == "test"
 
         assert getmsg(f).startswith("assert '%test' == 'test'")
 
     def test_custom_repr(self):
-
         def f():
-
             class Foo(object):
                 a = 1
 
@@ -620,7 +600,6 @@ def __repr__(self):
 
 
 class TestRewriteOnImport(object):
-
     def test_pycache_is_a_file(self, testdir):
         testdir.tmpdir.join("__pycache__").write("Hello")
         testdir.makepyfile(
@@ -671,9 +650,7 @@ def test_readonly(self, testdir):
 def test_rewritten():
     assert "@py_builtins" in globals()
             """
-            ).encode(
-                "utf-8"
-            ),
+            ).encode("utf-8"),
             "wb",
         )
         old_mode = sub.stat().mode
@@ -870,7 +847,6 @@ def test():
 
 
 class TestAssertionRewriteHookDetails(object):
-
     def test_loader_is_package_false_for_module(self, testdir):
         testdir.makepyfile(
             test_fun="""
@@ -1090,7 +1066,6 @@ def test_long_repr():
 
 
 class TestIssue925(object):
-
     def test_simple_case(self, testdir):
         testdir.makepyfile(
             """
@@ -1122,8 +1097,7 @@ def test_ternary_display():
         result.stdout.fnmatch_lines("*E*assert True == ((False == True) == True)")
 
 
-class TestIssue2121():
-
+class TestIssue2121:
     def test_simple(self, testdir):
         testdir.tmpdir.join("tests/file.py").ensure().write(
             """
diff --git a/testing/test_cacheprovider.py b/testing/test_cacheprovider.py
index 33d1dd8448c..fcf3eaf7559 100644
--- a/testing/test_cacheprovider.py
+++ b/testing/test_cacheprovider.py
@@ -6,11 +6,10 @@
 import os
 import shutil
 
-pytest_plugins = "pytester",
+pytest_plugins = ("pytester",)
 
 
 class TestNewAPI(object):
-
     def test_config_cache_makedir(self, testdir):
         testdir.makeini("[pytest]")
         config = testdir.parseconfigure()
@@ -182,7 +181,6 @@ def pytest_configure(config):
 
 
 class TestLastFailed(object):
-
     def test_lastfailed_usecase(self, testdir, monkeypatch):
         monkeypatch.setenv("PYTHONDONTWRITEBYTECODE", 1)
         p = testdir.makepyfile(
@@ -557,10 +555,9 @@ def test():
         )
         result = testdir.runpytest()
         result.stdout.fnmatch_lines("*1 failed*")
-        assert (
-            self.get_cached_last_failed(testdir)
-            == ["test_xfail_strict_considered_failure.py::test"]
-        )
+        assert self.get_cached_last_failed(testdir) == [
+            "test_xfail_strict_considered_failure.py::test"
+        ]
 
     @pytest.mark.parametrize("mark", ["mark.xfail", "mark.skip"])
     def test_failed_changed_to_xfail_or_skip(self, testdir, mark):
@@ -572,10 +569,9 @@ def test():
         """
         )
         result = testdir.runpytest()
-        assert (
-            self.get_cached_last_failed(testdir)
-            == ["test_failed_changed_to_xfail_or_skip.py::test"]
-        )
+        assert self.get_cached_last_failed(testdir) == [
+            "test_failed_changed_to_xfail_or_skip.py::test"
+        ]
         assert result.ret == 1
 
         testdir.makepyfile(
@@ -619,10 +615,10 @@ def test_foo_4():
         """
         )
         testdir.runpytest()
-        assert (
-            self.get_cached_last_failed(testdir)
-            == ["test_bar.py::test_bar_2", "test_foo.py::test_foo_4"]
-        )
+        assert self.get_cached_last_failed(testdir) == [
+            "test_bar.py::test_bar_2",
+            "test_foo.py::test_foo_4",
+        ]
 
         # 2. fix test_bar_2, run only test_bar.py
         testdir.makepyfile(
@@ -695,7 +691,6 @@ def test_2():
 
 
 class TestNewFirst(object):
-
     def test_newfirst_usecase(self, testdir):
         testdir.makepyfile(
             **{
diff --git a/testing/test_capture.py b/testing/test_capture.py
index e14b3af7851..54f0fbc44c9 100644
--- a/testing/test_capture.py
+++ b/testing/test_capture.py
@@ -48,7 +48,6 @@ def StdCapture(out=True, err=True, in_=True):
 
 
 class TestCaptureManager(object):
-
     def test_getmethod_default_no_fd(self, monkeypatch):
         from _pytest.capture import pytest_addoption
         from _pytest.config.argparsing import Parser
@@ -150,7 +149,6 @@ def test_collect_capturing(testdir):
 
 
 class TestPerTestCapturing(object):
-
     def test_capture_and_fixtures(self, testdir):
         p = testdir.makepyfile(
             """
@@ -294,7 +292,6 @@ def test_capturing_error():
 
 
 class TestLoggingInteraction(object):
-
     def test_logging_stream_ownership(self, testdir):
         p = testdir.makepyfile(
             """
@@ -399,7 +396,6 @@ def test_hello():
 
 
 class TestCaptureFixture(object):
-
     @pytest.mark.parametrize("opt", [[], ["-s"]])
     def test_std_functional(self, testdir, opt):
         reprec = testdir.inline_runsource(
@@ -771,7 +767,6 @@ def bad_snap(self):
 
 
 class TestCaptureIO(object):
-
     def test_text(self):
         f = capture.CaptureIO()
         f.write("hello")
@@ -1337,7 +1332,6 @@ def test_py36_windowsconsoleio_workaround_non_standard_streams():
     from _pytest.capture import _py36_windowsconsoleio_workaround
 
     class DummyStream(object):
-
         def write(self, s):
             pass
 
diff --git a/testing/test_collection.py b/testing/test_collection.py
index 657d64c74e2..e12e788b4b9 100644
--- a/testing/test_collection.py
+++ b/testing/test_collection.py
@@ -8,7 +8,6 @@
 
 
 class TestCollector(object):
-
     def test_collect_versus_item(self):
         from pytest import Collector, Item
 
@@ -115,7 +114,6 @@ def test_foo():
 
 
 class TestCollectFS(object):
-
     def test_ignored_certain_directories(self, testdir):
         tmpdir = testdir.tmpdir
         tmpdir.ensure("build", "test_notfound.py")
@@ -253,12 +251,10 @@ def test_testpaths_ini(self, testdir, monkeypatch):
 
 
 class TestCollectPluginHookRelay(object):
-
     def test_pytest_collect_file(self, testdir):
         wascalled = []
 
         class Plugin(object):
-
             def pytest_collect_file(self, path, parent):
                 if not path.basename.startswith("."):
                     # Ignore hidden files, e.g. .testmondata.
@@ -273,7 +269,6 @@ def test_pytest_collect_directory(self, testdir):
         wascalled = []
 
         class Plugin(object):
-
             def pytest_collect_directory(self, path, parent):
                 wascalled.append(path.basename)
 
@@ -285,7 +280,6 @@ def pytest_collect_directory(self, path, parent):
 
 
 class TestPrunetraceback(object):
-
     def test_custom_repr_failure(self, testdir):
         p = testdir.makepyfile(
             """
@@ -335,7 +329,6 @@ def pytest_make_collect_report():
 
 
 class TestCustomConftests(object):
-
     def test_ignore_collect_path(self, testdir):
         testdir.makeconftest(
             """
@@ -437,7 +430,6 @@ def pytest_collect_file(path, parent):
 
 
 class TestSession(object):
-
     def test_parsearg(self, testdir):
         p = testdir.makepyfile("def test_func(): pass")
         subdir = testdir.mkdir("sub")
@@ -634,7 +626,6 @@ def test_method(self):
 
 
 class Test_getinitialnodes(object):
-
     def test_global_file(self, testdir, tmpdir):
         x = tmpdir.ensure("x.py")
         with tmpdir.as_cwd():
@@ -662,7 +653,6 @@ def test_pkgfile(self, testdir):
 
 
 class Test_genitems(object):
-
     def test_check_collect_hashes(self, testdir):
         p = testdir.makepyfile(
             """
@@ -776,7 +766,6 @@ def runtest(self):
 
 
 class TestNodekeywords(object):
-
     def test_no_under(self, testdir):
         modcol = testdir.getmodulecol(
             """
diff --git a/testing/test_compat.py b/testing/test_compat.py
index 550a8f1b354..399b0d342b5 100644
--- a/testing/test_compat.py
+++ b/testing/test_compat.py
@@ -7,7 +7,6 @@
 
 
 def test_is_generator():
-
     def zap():
         yield
 
@@ -19,9 +18,7 @@ def foo():
 
 
 def test_real_func_loop_limit():
-
     class Evil(object):
-
         def __init__(self):
             self.left = 1000
 
@@ -86,7 +83,6 @@ async def bar():
 
 
 class ErrorsHelper(object):
-
     @property
     def raise_exception(self):
         raise Exception("exception should be catched")
diff --git a/testing/test_config.py b/testing/test_config.py
index 5fb048364f7..b507bb8e823 100644
--- a/testing/test_config.py
+++ b/testing/test_config.py
@@ -10,7 +10,6 @@
 
 
 class TestParseIni(object):
-
     @pytest.mark.parametrize(
         "section, filename", [("pytest", "pytest.ini"), ("tool:pytest", "setup.cfg")]
     )
@@ -118,7 +117,6 @@ def test_confcutdir(self, testdir):
 
 
 class TestConfigCmdlineParsing(object):
-
     def test_parsing_again_fails(self, testdir):
         config = testdir.parseconfig()
         pytest.raises(AssertionError, lambda: config.parse([]))
@@ -172,7 +170,6 @@ def test_absolute_win32_path(self, testdir):
 
 
 class TestConfigAPI(object):
-
     def test_config_trace(self, testdir):
         config = testdir.parseconfig()
         values = []
@@ -412,7 +409,6 @@ def test_iter_rewritable_modules(self, names, expected):
 
 
 class TestConfigFromdictargs(object):
-
     def test_basic_behavior(self):
         from _pytest.config import Config
 
@@ -479,7 +475,6 @@ def test_inifilename(self, tmpdir):
 
 
 def test_options_on_small_file_do_not_blow_up(testdir):
-
     def runfiletest(opts):
         reprec = testdir.inline_run(*opts)
         passed, skipped, failed = reprec.countoutcomes()
@@ -526,7 +521,6 @@ class EntryPoint(object):
             dist = Dist()
 
             def load(self):
-
                 class PseudoPlugin(object):
                     x = 42
 
@@ -606,9 +600,9 @@ def load(self):
         assert "mytestplugin" not in sys.modules
         assert config.pluginmanager.get_plugin("mytestplugin") is None
     else:
-        assert config.pluginmanager.get_plugin(
-            "mytestplugin"
-        ) is plugin_module_placeholder
+        assert (
+            config.pluginmanager.get_plugin("mytestplugin") is plugin_module_placeholder
+        )
 
 
 def test_cmdline_processargs_simple(testdir):
@@ -709,7 +703,6 @@ def test_notify_exception(testdir, capfd):
     assert "ValueError" in err
 
     class A(object):
-
         def pytest_internalerror(self, excrepr):
             return True
 
@@ -725,7 +718,6 @@ def test_load_initial_conftest_last_ordering(testdir):
     pm = get_config().pluginmanager
 
     class My(object):
-
         def pytest_load_initial_conftests(self):
             pass
 
@@ -754,7 +746,6 @@ def test_get_plugin_specs_as_list():
 
 
 class TestWarning(object):
-
     def test_warn_config(self, testdir):
         testdir.makeconftest(
             """
@@ -804,7 +795,6 @@ def test_hello(fix):
 
 
 class TestRootdir(object):
-
     def test_simple_noini(self, tmpdir):
         assert get_common_ancestor([tmpdir]) == tmpdir
         a = tmpdir.mkdir("a")
@@ -863,7 +853,6 @@ def test_with_specific_inifile(self, tmpdir):
 
 
 class TestOverrideIniArgs(object):
-
     @pytest.mark.parametrize("name", "setup.cfg tox.ini pytest.ini".split())
     def test_override_ini_names(self, testdir, name):
         testdir.tmpdir.join(name).write(
diff --git a/testing/test_conftest.py b/testing/test_conftest.py
index 61b640976f1..4b80f1f56d7 100644
--- a/testing/test_conftest.py
+++ b/testing/test_conftest.py
@@ -28,9 +28,7 @@ def ConftestWithSetinitial(path):
 
 
 def conftest_setinitial(conftest, args, confcutdir=None):
-
     class Namespace(object):
-
         def __init__(self):
             self.file_or_dir = args
             self.confcutdir = str(confcutdir)
@@ -40,7 +38,6 @@ def __init__(self):
 
 
 class TestConftestValueAccessGlobal(object):
-
     def test_basic_init(self, basedir):
         conftest = PytestPluginManager()
         p = basedir.join("adir")
@@ -311,7 +308,6 @@ def pytest_addoption(parser):
 
 
 class TestConftestVisibility(object):
-
     def _setup_tree(self, testdir):  # for issue616
         # example mostly taken from:
         # https://mail.python.org/pipermail/pytest-dev/2014-September/002617.html
diff --git a/testing/test_doctest.py b/testing/test_doctest.py
index 7f3aff3b0e1..6a84c5febc9 100644
--- a/testing/test_doctest.py
+++ b/testing/test_doctest.py
@@ -8,7 +8,6 @@
 
 
 class TestDoctests(object):
-
     def test_collect_testtextfile(self, testdir):
         w = testdir.maketxtfile(whatever="")
         checkfile = testdir.maketxtfile(
@@ -723,7 +722,6 @@ def test_foo():
 
 
 class TestLiterals(object):
-
     @pytest.mark.parametrize("config_mode", ["ini", "comment"])
     def test_allow_unicode(self, testdir, config_mode):
         """Test that doctests which output unicode work in all python versions
@@ -841,7 +839,6 @@ class TestDoctestSkips(object):
 
     @pytest.fixture(params=["text", "module"])
     def makedoctest(self, testdir, request):
-
         def makeit(doctest):
             mode = request.param
             if mode == "text":
@@ -1122,7 +1119,6 @@ def foo():
 
 
 class TestDoctestReportingOption(object):
-
     def _run_doctest_report(self, testdir, format):
         testdir.makepyfile(
             """
diff --git a/testing/test_junitxml.py b/testing/test_junitxml.py
index d0be5f26759..aa6b9a12050 100644
--- a/testing/test_junitxml.py
+++ b/testing/test_junitxml.py
@@ -29,7 +29,6 @@ def nodeval(node, name):
 
 
 class DomNode(object):
-
     def __init__(self, dom):
         self.__node = dom
 
@@ -81,7 +80,6 @@ def next_siebling(self):
 
 
 class TestPython(object):
-
     def test_summing_simple(self, testdir):
         testdir.makepyfile(
             """
@@ -713,7 +711,6 @@ def test_dont_configure_on_slaves(tmpdir):
     gotten = []
 
     class FakeConfig(object):
-
         def __init__(self):
             self.pluginmanager = self
             self.option = self
@@ -737,7 +734,6 @@ def getini(self, name):
 
 
 class TestNonPython(object):
-
     def test_summing_simple(self, testdir):
         testdir.makeconftest(
             """
@@ -1127,18 +1123,15 @@ def test_pass():
     import pprint
 
     pprint.pprint(items)
-    assert (
-        items
-        == [
-            u"conftest a conftest.py",
-            u"conftest a conftest.py",
-            u"conftest b conftest.py",
-            u"test_fancy_items_regression a test_fancy_items_regression.py",
-            u"test_fancy_items_regression a test_fancy_items_regression.py",
-            u"test_fancy_items_regression b test_fancy_items_regression.py",
-            u"test_fancy_items_regression test_pass" u" test_fancy_items_regression.py",
-        ]
-    )
+    assert items == [
+        u"conftest a conftest.py",
+        u"conftest a conftest.py",
+        u"conftest b conftest.py",
+        u"test_fancy_items_regression a test_fancy_items_regression.py",
+        u"test_fancy_items_regression a test_fancy_items_regression.py",
+        u"test_fancy_items_regression b test_fancy_items_regression.py",
+        u"test_fancy_items_regression test_pass" u" test_fancy_items_regression.py",
+    ]
 
 
 def test_global_properties(testdir):
diff --git a/testing/test_mark.py b/testing/test_mark.py
index 17349916e6c..084e3c3a536 100644
--- a/testing/test_mark.py
+++ b/testing/test_mark.py
@@ -21,7 +21,6 @@
 
 
 class TestMark(object):
-
     def test_markinfo_repr(self):
         from _pytest.mark import MarkInfo, Mark
 
@@ -39,7 +38,6 @@ def test_pytest_mark_notcallable(self):
         pytest.raises((AttributeError, TypeError), mark)
 
     def test_mark_with_param(self):
-
         def some_function(abc):
             pass
 
@@ -487,7 +485,6 @@ def test_func(a, b):
 
 
 class TestFunctional(object):
-
     def test_mark_per_function(self, testdir):
         p = testdir.makepyfile(
             """
@@ -884,7 +881,6 @@ def test_1(parameter):
 
 
 class TestKeywordSelection(object):
-
     def test_select_simple(self, testdir):
         file_test = testdir.makepyfile(
             """
@@ -1037,7 +1033,6 @@ def test_parameterset_extractfrom(argval, expected):
 
 
 def test_legacy_transfer():
-
     class FakeModule(object):
         pytestmark = []
 
@@ -1058,7 +1053,6 @@ def fake_method(self):
 
 
 class TestMarkDecorator(object):
-
     @pytest.mark.parametrize(
         "lhs, rhs, expected",
         [
diff --git a/testing/test_monkeypatch.py b/testing/test_monkeypatch.py
index c298ce0d929..c47d10de2d2 100644
--- a/testing/test_monkeypatch.py
+++ b/testing/test_monkeypatch.py
@@ -17,7 +17,6 @@ def mp():
 
 
 def test_setattr():
-
     class A(object):
         x = 1
 
@@ -42,7 +41,6 @@ class A(object):
 
 
 class TestSetattrWithImportPath(object):
-
     def test_string_expression(self, monkeypatch):
         monkeypatch.setattr("os.path.abspath", lambda x: "hello2")
         assert os.path.abspath("123") == "hello2"
@@ -84,7 +82,6 @@ def test_delattr(self, monkeypatch):
 
 
 def test_delattr():
-
     class A(object):
         x = 1
 
@@ -311,7 +308,6 @@ def test_importerror(monkeypatch):
 
 
 class SampleNew(object):
-
     @staticmethod
     def hello():
         return True
diff --git a/testing/test_nose.py b/testing/test_nose.py
index abe7323754e..d63b3058433 100644
--- a/testing/test_nose.py
+++ b/testing/test_nose.py
@@ -33,7 +33,6 @@ def test_setup_func_with_setup_decorator():
     values = []
 
     class A(object):
-
         @pytest.fixture(autouse=True)
         def f(self):
             values.append(1)
diff --git a/testing/test_parseopt.py b/testing/test_parseopt.py
index 79076cafd81..3870ad419e5 100644
--- a/testing/test_parseopt.py
+++ b/testing/test_parseopt.py
@@ -13,7 +13,6 @@ def parser():
 
 
 class TestParser(object):
-
     def test_no_help_by_default(self, capsys):
         parser = parseopt.Parser(usage="xyz")
         pytest.raises(SystemExit, lambda: parser.parse(["-h"]))
@@ -34,9 +33,8 @@ def test_argument(self):
         assert argument.dest == "test"
         argument = parseopt.Argument("-t", "--test", dest="abc")
         assert argument.dest == "abc"
-        assert (
-            str(argument)
-            == ("Argument(_short_opts: ['-t'], _long_opts: ['--test'], dest: 'abc')")
+        assert str(argument) == (
+            "Argument(_short_opts: ['-t'], _long_opts: ['--test'], dest: 'abc')"
         )
 
     def test_argument_type(self):
@@ -180,7 +178,6 @@ def test_parse_split_positional_arguments(self, parser):
         assert args.S is False
 
     def test_parse_defaultgetter(self):
-
         def defaultget(option):
             if not hasattr(option, "type"):
                 return
@@ -204,15 +201,11 @@ def test_drop_short_helper(self):
         )
         parser.add_argument(
             "-t", "--twoword", "--duo", "--two-word", "--two", help="foo"
-        ).map_long_option = {
-            "two": "two-word"
-        }
+        ).map_long_option = {"two": "two-word"}
         # throws error on --deux only!
         parser.add_argument(
             "-d", "--deuxmots", "--deux-mots", action="store_true", help="foo"
-        ).map_long_option = {
-            "deux": "deux-mots"
-        }
+        ).map_long_option = {"deux": "deux-mots"}
         parser.add_argument("-s", action="store_true", help="single short")
         parser.add_argument("--abc", "-a", action="store_true", help="bar")
         parser.add_argument("--klm", "-k", "--kl-m", action="store_true", help="bar")
@@ -224,9 +217,7 @@ def test_drop_short_helper(self):
         )
         parser.add_argument(
             "-x", "--exit-on-first", "--exitfirst", action="store_true", help="spam"
-        ).map_long_option = {
-            "exitfirst": "exit-on-first"
-        }
+        ).map_long_option = {"exitfirst": "exit-on-first"}
         parser.add_argument("files_and_dirs", nargs="*")
         args = parser.parse_args(["-k", "--duo", "hallo", "--exitfirst"])
         assert args.twoword == "hallo"
diff --git a/testing/test_pastebin.py b/testing/test_pastebin.py
index ad7c4d0c1c0..1005dcba4fa 100644
--- a/testing/test_pastebin.py
+++ b/testing/test_pastebin.py
@@ -5,7 +5,6 @@
 
 
 class TestPasteCapture(object):
-
     @pytest.fixture
     def pastebinlist(self, monkeypatch, request):
         pastebinlist = []
@@ -85,7 +84,6 @@ def test():
 
 
 class TestPaste(object):
-
     @pytest.fixture
     def pastebin(self, request):
         return request.config.pluginmanager.getplugin("pastebin")
@@ -102,7 +100,6 @@ def mocked(url, data):
             calls.append((url, data))
 
             class DummyFile(object):
-
                 def read(self):
                     # part of html of a normal response
                     return b'View <a href="/raw/3c0c6750bd">raw</a>.'
diff --git a/testing/test_pdb.py b/testing/test_pdb.py
index 615d52e8345..08be812a2db 100644
--- a/testing/test_pdb.py
+++ b/testing/test_pdb.py
@@ -25,7 +25,6 @@ def custom_pdb_calls():
 
     # install dummy debugger class and track which methods were called on it
     class _CustomPdb(object):
-
         def __init__(self, *args, **kwargs):
             called.append("init")
 
@@ -45,7 +44,6 @@ def custom_debugger_hook():
 
     # install dummy debugger class and track which methods were called on it
     class _CustomDebugger(object):
-
         def __init__(self, *args, **kwargs):
             called.append("init")
 
@@ -65,7 +63,6 @@ def set_trace(self, frame):
 
 
 class TestPDB(object):
-
     @pytest.fixture
     def pdblist(self, request):
         monkeypatch = request.getfixturevalue("monkeypatch")
@@ -563,7 +560,6 @@ def test_foo():
 
 
 class TestDebuggingBreakpoints(object):
-
     def test_supports_breakpoint_module_global(self):
         """
         Test that supports breakpoint global marks on Python 3.7+ and not on
diff --git a/testing/test_pluginmanager.py b/testing/test_pluginmanager.py
index 22cea4207c6..c24314d22a6 100644
--- a/testing/test_pluginmanager.py
+++ b/testing/test_pluginmanager.py
@@ -16,7 +16,6 @@ def pytestpm():
 
 
 class TestPytestPluginInteractions(object):
-
     def test_addhooks_conftestplugin(self, testdir):
         testdir.makepyfile(
             newhooks="""
@@ -104,7 +103,6 @@ def test_configure(self, testdir):
         values = []
 
         class A(object):
-
             def pytest_configure(self, config):
                 values.append(self)
 
@@ -125,12 +123,10 @@ def test_hook_tracing(self):
         saveindent = []
 
         class api1(object):
-
             def pytest_plugin_registered(self):
                 saveindent.append(pytestpm.trace.root.indent)
 
         class api2(object):
-
             def pytest_plugin_registered(self):
                 saveindent.append(pytestpm.trace.root.indent)
                 raise ValueError()
@@ -175,12 +171,10 @@ def test_warn_on_deprecated_addhooks(self, pytestpm):
         warnings = []
 
         class get_warnings(object):
-
             def pytest_logwarning(self, code, fslocation, message, nodeid):
                 warnings.append(message)
 
         class Plugin(object):
-
             def pytest_testhook():
                 pass
 
@@ -232,7 +226,6 @@ def test_traceback():
 
 
 class TestPytestPluginManager(object):
-
     def test_register_imported_modules(self):
         pm = PytestPluginManager()
         mod = types.ModuleType("x.y.pytest_hello")
@@ -363,7 +356,6 @@ def test_consider_conftest_deps(self, testdir, pytestpm):
 
 
 class TestPytestPluginManagerBootstrapming(object):
-
     def test_preparse_args(self, pytestpm):
         pytest.raises(
             ImportError, lambda: pytestpm.consider_preparse(["xyz", "-p", "hello123"])
diff --git a/testing/test_pytester.py b/testing/test_pytester.py
index b74c0b7f70c..195f2c7f181 100644
--- a/testing/test_pytester.py
+++ b/testing/test_pytester.py
@@ -84,9 +84,7 @@ def test_hello(testdir):
 
 
 def make_holder():
-
     class apiclass(object):
-
         def pytest_xyz(self, arg):
             "x"
 
@@ -143,7 +141,6 @@ def setup_function(function):
 
 
 class TestInlineRunModulesCleanup(object):
-
     def test_inline_run_test_module_not_cleaned_up(self, testdir):
         test_mod = testdir.makepyfile("def test_foo(): assert True")
         result = testdir.inline_run(str(test_mod))
@@ -154,7 +151,6 @@ def test_inline_run_test_module_not_cleaned_up(self, testdir):
         assert result2.ret == EXIT_TESTSFAILED
 
     def spy_factory(self):
-
         class SysModulesSnapshotSpy(object):
             instances = []
 
@@ -220,7 +216,6 @@ def test_foo():
 
 
 def test_inline_run_clean_sys_paths(testdir):
-
     def test_sys_path_change_cleanup(self, testdir):
         test_path1 = testdir.tmpdir.join("boink1").strpath
         test_path2 = testdir.tmpdir.join("boink2").strpath
@@ -245,7 +240,6 @@ def test_foo():
         assert sys.meta_path == original_meta_path
 
     def spy_factory(self):
-
         class SysPathsSnapshotSpy(object):
             instances = []
 
@@ -371,7 +365,8 @@ def test_restore(self, monkeypatch, path_type):
         original_other = list(getattr(sys, other_path_type))
         snapshot = SysPathsSnapshot()
         transformation = {
-            "source": (0, 1, 2, 3, 4, 5), "target": (6, 2, 9, 7, 5, 8)
+            "source": (0, 1, 2, 3, 4, 5),
+            "target": (6, 2, 9, 7, 5, 8),
         }  # noqa: E201
         assert sys_path == [self.path(x) for x in transformation["source"]]
         sys_path[1] = self.path(6)
diff --git a/testing/test_recwarn.py b/testing/test_recwarn.py
index a8e2fb80378..f81d278895e 100644
--- a/testing/test_recwarn.py
+++ b/testing/test_recwarn.py
@@ -21,7 +21,6 @@ def test_method(recwarn):
 
 
 class TestWarningsRecorderChecker(object):
-
     def test_recording(self):
         rec = WarningsRecorder()
         with rec:
@@ -188,7 +187,6 @@ def f():
 
 
 class TestWarns(object):
-
     def test_strings(self):
         # different messages, b/c Python suppresses multiple identical warnings
         source1 = "warnings.warn('w1', RuntimeWarning)"
diff --git a/testing/test_runner.py b/testing/test_runner.py
index f5430a90da5..a78d4de31c7 100644
--- a/testing/test_runner.py
+++ b/testing/test_runner.py
@@ -12,7 +12,6 @@
 
 
 class TestSetupState(object):
-
     def test_setup(self, testdir):
         ss = runner.SetupState()
         item = testdir.getitem("def test_func(): pass")
@@ -101,7 +100,6 @@ def fin_module():
 
 
 class BaseFunctionalTests(object):
-
     def test_passfunction(self, testdir):
         reports = testdir.runitem(
             """
@@ -253,10 +251,10 @@ def test_func():
         """
         )
         reps = rec.getcalls("pytest_runtest_logstart pytest_runtest_logfinish")
-        assert (
-            [x._name for x in reps]
-            == ["pytest_runtest_logstart", "pytest_runtest_logfinish"]
-        )
+        assert [x._name for x in reps] == [
+            "pytest_runtest_logstart",
+            "pytest_runtest_logfinish",
+        ]
         for rep in reps:
             assert rep.nodeid == "test_logstart_logfinish_hooks.py::test_func"
             assert rep.location == ("test_logstart_logfinish_hooks.py", 1, "test_func")
@@ -395,9 +393,7 @@ def test_func():
 
 
 class TestExecutionNonForked(BaseFunctionalTests):
-
     def getrunner(self):
-
         def f(item):
             return runner.runtestprotocol(item, log=False)
 
@@ -439,7 +435,6 @@ def test_func():
 
 
 class TestSessionReports(object):
-
     def test_collect_result(self, testdir):
         col = testdir.getmodulecol(
             """
@@ -869,14 +864,11 @@ def test(fix):
     result = testdir.runpytest_inprocess()
     assert result.ret == 0
     test_id = "test_current_test_env_var.py::test"
-    assert (
-        pytest_current_test_vars
-        == [
-            ("setup", test_id + " (setup)"),
-            ("call", test_id + " (call)"),
-            ("teardown", test_id + " (teardown)"),
-        ]
-    )
+    assert pytest_current_test_vars == [
+        ("setup", test_id + " (setup)"),
+        ("call", test_id + " (call)"),
+        ("teardown", test_id + " (teardown)"),
+    ]
     assert "PYTEST_CURRENT_TEST" not in os.environ
 
 
diff --git a/testing/test_session.py b/testing/test_session.py
index 4a594009bab..50ce91534bf 100644
--- a/testing/test_session.py
+++ b/testing/test_session.py
@@ -6,7 +6,6 @@
 
 
 class SessionTests(object):
-
     def test_basic_testitem_events(self, testdir):
         tfile = testdir.makepyfile(
             """
@@ -168,7 +167,6 @@ def test_one(): pass
 
 
 class TestNewSession(SessionTests):
-
     def test_order_of_execution(self, testdir):
         reprec = testdir.inline_runsource(
             """
diff --git a/testing/test_skipping.py b/testing/test_skipping.py
index 5d970e2fea0..507ce126ad2 100644
--- a/testing/test_skipping.py
+++ b/testing/test_skipping.py
@@ -7,7 +7,6 @@
 
 
 class TestEvaluator(object):
-
     def test_no_marker(self, testdir):
         item = testdir.getitem("def test_func(): pass")
         evalskipif = MarkEvaluator(item, "skipif")
@@ -126,7 +125,10 @@ def test_func():
         )
         ev = MarkEvaluator(item, "skipif")
         exc = pytest.raises(pytest.fail.Exception, ev.istrue)
-        assert """Failed: you need to specify reason=STRING when using booleans as conditions.""" in exc.value.msg
+        assert (
+            """Failed: you need to specify reason=STRING when using booleans as conditions."""
+            in exc.value.msg
+        )
 
     def test_skipif_class(self, testdir):
         item, = testdir.getitems(
@@ -146,7 +148,6 @@ def test_func(self):
 
 
 class TestXFail(object):
-
     @pytest.mark.parametrize("strict", [True, False])
     def test_xfail_simple(self, testdir, strict):
         item = testdir.getitem(
@@ -514,7 +515,6 @@ def test_foo():
 
 
 class TestXFailwithSetupTeardown(object):
-
     def test_failing_setup_issue9(self, testdir):
         testdir.makepyfile(
             """
@@ -547,7 +547,6 @@ def test_func():
 
 
 class TestSkip(object):
-
     def test_skip_class(self, testdir):
         testdir.makepyfile(
             """
@@ -645,7 +644,6 @@ def test_hello():
 
 
 class TestSkipif(object):
-
     def test_skipif_conditional(self, testdir):
         item = testdir.getitem(
             """
@@ -1023,7 +1021,6 @@ def pytest_runtest_setup(item):
 
 
 class TestBooleanCondition(object):
-
     def test_skipif(self, testdir):
         testdir.makepyfile(
             """
diff --git a/testing/test_terminal.py b/testing/test_terminal.py
index 8f08ad34fa1..a9da27980c0 100644
--- a/testing/test_terminal.py
+++ b/testing/test_terminal.py
@@ -18,7 +18,6 @@
 
 
 class Option(object):
-
     def __init__(self, verbose=False, fulltrace=False):
         self.verbose = verbose
         self.fulltrace = fulltrace
@@ -68,7 +67,6 @@ def test_plugin_nameversion(input, expected):
 
 
 class TestTerminal(object):
-
     def test_pass_skip_fail(self, testdir, option):
         testdir.makepyfile(
             """
@@ -248,7 +246,6 @@ def test_rewrite(self, testdir, monkeypatch):
 
 
 class TestCollectonly(object):
-
     def test_collectonly_basic(self, testdir):
         testdir.makepyfile(
             """
@@ -356,7 +353,6 @@ def test_repr_python_version(monkeypatch):
 
 
 class TestFixtureReporting(object):
-
     def test_setup_fixture_error(self, testdir):
         testdir.makepyfile(
             """
@@ -457,7 +453,6 @@ def teardown_function(function):
 
 
 class TestTerminalFunctional(object):
-
     def test_deselected(self, testdir):
         testpath = testdir.makepyfile(
             """
@@ -735,9 +730,7 @@ def test_this(i):
 
 
 def test_getreportopt():
-
     class Config(object):
-
         class Option(object):
             reportchars = ""
             disable_warnings = True
@@ -1102,7 +1095,6 @@ def test_no_trailing_whitespace_after_inifile_word(testdir):
 
 
 class TestProgress(object):
-
     @pytest.fixture
     def many_tests_files(self, testdir):
         testdir.makepyfile(
diff --git a/testing/test_tmpdir.py b/testing/test_tmpdir.py
index 33624909495..db6e6867400 100644
--- a/testing/test_tmpdir.py
+++ b/testing/test_tmpdir.py
@@ -42,7 +42,6 @@ def test_ensuretemp(recwarn):
 
 
 class TestTempdirHandler(object):
-
     def test_mktemp(self, testdir):
         from _pytest.tmpdir import TempdirFactory
 
@@ -59,7 +58,6 @@ def test_mktemp(self, testdir):
 
 
 class TestConfigTmpdir(object):
-
     def test_getbasetemp_custom_removes_old(self, testdir):
         mytemp = testdir.tmpdir.join("xyz")
         p = testdir.makepyfile(
diff --git a/testing/test_unittest.py b/testing/test_unittest.py
index 65ffdb97538..482e8928007 100644
--- a/testing/test_unittest.py
+++ b/testing/test_unittest.py
@@ -389,7 +389,6 @@ def test_func1(self):
 
 
 class TestTrialUnittest(object):
-
     def setup_class(cls):
         cls.ut = pytest.importorskip("twisted.trial.unittest")
         # on windows trial uses a socket for a reactor and apparently doesn't close it properly
diff --git a/testing/test_warnings.py b/testing/test_warnings.py
index c5bea052a47..15ec36600d6 100644
--- a/testing/test_warnings.py
+++ b/testing/test_warnings.py
@@ -160,9 +160,8 @@ def test_func(fix):
     reason="warnings message is broken as it is not str instance",
 )
 def test_py2_unicode(testdir, pyfile_with_warnings):
-    if (
-        getattr(sys, "pypy_version_info", ())[:2] == (5, 9)
-        and sys.platform.startswith("win")
+    if getattr(sys, "pypy_version_info", ())[:2] == (5, 9) and sys.platform.startswith(
+        "win"
     ):
         pytest.xfail("fails with unicode error on PyPy2 5.9 and Windows (#2905)")
     testdir.makepyfile(
diff --git a/tox.ini b/tox.ini
index 810d5597f16..adc4e974661 100644
--- a/tox.ini
+++ b/tox.ini
@@ -207,3 +207,4 @@ filterwarnings =
 
 [flake8]
 max-line-length = 120
+ignore = E203,W503