Revert "TST: de-xfail (#44659)" (#44665)

This reverts commit 7b78b73.

Author: jbrockmendel

pandas/tests/frame/test_reductions.py

@@ -93,9 +93,11 @@ def wrapper(x):
         tm.assert_series_equal(
             result0, frame.apply(wrapper), check_dtype=check_dtype, rtol=rtol, atol=atol
         )
+        # FIXME: HACK: win32
         tm.assert_series_equal(
             result1,
             frame.apply(wrapper, axis=1),
+            check_dtype=False,
             rtol=rtol,
             atol=atol,
         )
@@ -198,7 +200,9 @@ def wrapper(x):
         result1 = f(axis=1, skipna=False)
 
         tm.assert_series_equal(result0, frame.apply(wrapper))
-        tm.assert_series_equal(result1, frame.apply(wrapper, axis=1))
+        tm.assert_series_equal(
+            result1, frame.apply(wrapper, axis=1), check_dtype=False
+        )  # FIXME: HACK: win32
     else:
         skipna_wrapper = alternative
         wrapper = alternative

pandas/tests/indexes/datetimes/test_indexing.py

@@ -651,6 +651,10 @@ def test_get_indexer_mixed_dtypes(self, target):
             ([date(9999, 1, 1), date(9999, 1, 1)], [-1, -1]),
         ],
     )
+    # FIXME: these warnings are flaky GH#36131
+    @pytest.mark.filterwarnings(
+        "ignore:Comparison of Timestamp with datetime.date:FutureWarning"
+    )
     def test_get_indexer_out_of_bounds_date(self, target, positions):
         values = DatetimeIndex([Timestamp("2020-01-01"), Timestamp("2020-01-02")])
 

pandas/tests/io/parser/common/test_chunksize.py

@@ -162,6 +162,7 @@ def test_chunk_begins_with_newline_whitespace(all_parsers):
 
 
 @pytest.mark.slow
+@pytest.mark.xfail(reason="GH38630, sometimes gives ResourceWarning", strict=False)
 def test_chunks_have_consistent_numerical_type(all_parsers):
     parser = all_parsers
     integers = [str(i) for i in range(499999)]
@@ -175,7 +176,7 @@ def test_chunks_have_consistent_numerical_type(all_parsers):
     assert result.a.dtype == float
 
 
-def test_warn_if_chunks_have_mismatched_type(all_parsers):
+def test_warn_if_chunks_have_mismatched_type(all_parsers, request):
     warning_type = None
     parser = all_parsers
     size = 10000
@@ -192,8 +193,24 @@ def test_warn_if_chunks_have_mismatched_type(all_parsers):
 
     buf = StringIO(data)
 
-    with tm.assert_produces_warning(warning_type):
-        df = parser.read_csv(buf)
+    try:
+        with tm.assert_produces_warning(warning_type):
+            df = parser.read_csv(buf)
+    except AssertionError as err:
+        # 2021-02-21 this occasionally fails on the CI with an unexpected
+        #  ResourceWarning that we have been unable to track down,
+        #  see GH#38630
+        if "ResourceWarning" not in str(err) or parser.engine != "python":
+            raise
+
+        # Check the main assertion of the test before re-raising
+        assert df.a.dtype == object
+
+        mark = pytest.mark.xfail(
+            reason="ResourceWarning for unclosed SSL Socket, GH#38630"
+        )
+        request.node.add_marker(mark)
+        raise
 
     assert df.a.dtype == object