diff --git a/splunklib/client.py b/splunklib/client.py
index de2f53a16..39b1dcc34 100644
--- a/splunklib/client.py
+++ b/splunklib/client.py
@@ -1872,7 +1872,7 @@ def delete(self, username, realm=None):
             name = UrlEncoded(realm, encode_slash=True) + ":" + UrlEncoded(username, encode_slash=True)
 
         # Append the : expected at the end of the name
-        if name[-1] is not ":":
+        if name[-1] != ":":
             name = name + ":"
         return Collection.delete(self, name)
 
diff --git a/splunklib/searchcommands/internals.py b/splunklib/searchcommands/internals.py
index 41caceb32..f7146e289 100644
--- a/splunklib/searchcommands/internals.py
+++ b/splunklib/searchcommands/internals.py
@@ -75,7 +75,7 @@ def set_binary_mode(fh):
 
 
 class CommandLineParser(object):
-    """ Parses the arguments to a search command.
+    r""" Parses the arguments to a search command.
 
     A search command line is described by the following syntax.
 
diff --git a/tests/testlib.py b/tests/testlib.py
index c5a40648d..04006030f 100644
--- a/tests/testlib.py
+++ b/tests/testlib.py
@@ -184,7 +184,7 @@ def app_collection_installed(self):
         return collectionName in self.service.apps
 
     def pathInApp(self, appName, pathComponents):
-        """Return a path to *pathComponents* in *appName*.
+        r"""Return a path to *pathComponents* in *appName*.
 
         `pathInApp` is used to refer to files in applications installed with
         `install_app_from_collection`. For example, the app `file_to_upload` in