diff --git a/pandas/tests/arrays/categorical/test_missing.py b/pandas/tests/arrays/categorical/test_missing.py
index c78f02245a5b4..32698d190d93c 100644
--- a/pandas/tests/arrays/categorical/test_missing.py
+++ b/pandas/tests/arrays/categorical/test_missing.py
@@ -4,11 +4,13 @@
 import numpy as np
 import pytest
 
-import pandas.util.testing as tm
-from pandas import Categorical, Index, isna
 from pandas.compat import lrange
+
 from pandas.core.dtypes.dtypes import CategoricalDtype
 
+from pandas import Categorical, Index, isna
+import pandas.util.testing as tm
+
 
 class TestCategoricalMissing(object):
 
diff --git a/pandas/tests/arrays/categorical/test_sorting.py b/pandas/tests/arrays/categorical/test_sorting.py
index 88edb6c8f1348..922d9fdb788b1 100644
--- a/pandas/tests/arrays/categorical/test_sorting.py
+++ b/pandas/tests/arrays/categorical/test_sorting.py
@@ -2,8 +2,8 @@
 
 import numpy as np
 
-import pandas.util.testing as tm
 from pandas import Categorical, Index
+import pandas.util.testing as tm
 
 
 class TestCategoricalSort(object):
diff --git a/pandas/tests/arrays/test_datetimelike.py b/pandas/tests/arrays/test_datetimelike.py
index 3d5c810402fba..3fd03a351de7c 100644
--- a/pandas/tests/arrays/test_datetimelike.py
+++ b/pandas/tests/arrays/test_datetimelike.py
@@ -3,10 +3,9 @@
 import pytest
 
 import pandas as pd
-import pandas.util.testing as tm
 from pandas.core.arrays import (
-    DatetimeArrayMixin, PeriodArray, TimedeltaArrayMixin
-)
+    DatetimeArrayMixin, PeriodArray, TimedeltaArrayMixin)
+import pandas.util.testing as tm
 
 
 # TODO: more freq variants
diff --git a/pandas/tests/arrays/test_integer.py b/pandas/tests/arrays/test_integer.py
index 41ec2d3026499..ec627c2789d8f 100644
--- a/pandas/tests/arrays/test_integer.py
+++ b/pandas/tests/arrays/test_integer.py
@@ -2,16 +2,16 @@
 import numpy as np
 import pytest
 
+from pandas.core.dtypes.generic import ABCIndexClass
+
 import pandas as pd
-import pandas.util.testing as tm
 from pandas.api.types import is_float, is_float_dtype, is_integer, is_scalar
 from pandas.core.arrays import IntegerArray, integer_array
 from pandas.core.arrays.integer import (
     Int8Dtype, Int16Dtype, Int32Dtype, Int64Dtype, UInt8Dtype, UInt16Dtype,
-    UInt32Dtype, UInt64Dtype
-)
-from pandas.core.dtypes.generic import ABCIndexClass
+    UInt32Dtype, UInt64Dtype)
 from pandas.tests.extension.base import BaseOpsUtil
+import pandas.util.testing as tm
 
 
 def make_data():
diff --git a/pandas/tests/series/test_duplicates.py b/pandas/tests/series/test_duplicates.py
index 735ecd3917a1b..f41483405f6cc 100644
--- a/pandas/tests/series/test_duplicates.py
+++ b/pandas/tests/series/test_duplicates.py
@@ -1,10 +1,9 @@
 # coding=utf-8
 
-import pytest
-
 import numpy as np
+import pytest
 
-from pandas import Series, Categorical
+from pandas import Categorical, Series
 import pandas.util.testing as tm
 
 
diff --git a/pandas/tests/util/test_hashing.py b/pandas/tests/util/test_hashing.py
index 49f8fa30ecb6a..11dd2e98adda2 100644
--- a/pandas/tests/util/test_hashing.py
+++ b/pandas/tests/util/test_hashing.py
@@ -4,10 +4,10 @@
 import pytest
 
 import pandas as pd
-import pandas.util.testing as tm
 from pandas import DataFrame, Index, MultiIndex, Series
 from pandas.core.util.hashing import _hash_scalar, hash_tuple, hash_tuples
 from pandas.util import hash_array, hash_pandas_object
+import pandas.util.testing as tm
 
 
 class TestHashing(object):
diff --git a/pandas/tests/util/test_testing.py b/pandas/tests/util/test_testing.py
index db2fc5ec868c6..d1dc91f94e3c4 100644
--- a/pandas/tests/util/test_testing.py
+++ b/pandas/tests/util/test_testing.py
@@ -6,14 +6,14 @@
 import numpy as np
 import pytest
 
-import pandas as pd
 import pandas.util._test_decorators as td
-import pandas.util.testing as tm
+
+import pandas as pd
 from pandas import DataFrame, Series, compat
+import pandas.util.testing as tm
 from pandas.util.testing import (
     RNGContext, assert_almost_equal, assert_frame_equal, assert_index_equal,
-    assert_numpy_array_equal, assert_series_equal, raise_with_traceback
-)
+    assert_numpy_array_equal, assert_series_equal, raise_with_traceback)
 
 
 class TestAssertAlmostEqual(object):
diff --git a/pandas/tests/util/test_util.py b/pandas/tests/util/test_util.py
index 61b3cc526d6d9..032ee5eb22aaa 100644
--- a/pandas/tests/util/test_util.py
+++ b/pandas/tests/util/test_util.py
@@ -1,23 +1,23 @@
 # -*- coding: utf-8 -*-
 import codecs
+from collections import OrderedDict
 import locale
 import os
 import sys
-from collections import OrderedDict
 from uuid import uuid4
 
 import pytest
 
-import pandas.core.common as com
-import pandas.util._test_decorators as td
-import pandas.util.testing as tm
 from pandas.compat import PY3, intern
 from pandas.util._decorators import deprecate_kwarg, make_signature
 from pandas.util._move import BadMove, move_into_mutable_buffer, stolenbuf
+import pandas.util._test_decorators as td
 from pandas.util._validators import (
     validate_args, validate_args_and_kwargs, validate_bool_kwarg,
-    validate_kwargs
-)
+    validate_kwargs)
+
+import pandas.core.common as com
+import pandas.util.testing as tm
 
 
 class TestDecorators(object):
diff --git a/setup.cfg b/setup.cfg
index 8a3cfd1551a46..0608585872775 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -196,7 +196,6 @@ skip=
     pandas/tests/indexes/multi/conftest.py,
     pandas/tests/indexes/multi/test_join.py,
     pandas/tests/indexes/multi/test_conversion.py,
-
     pandas/tests/indexes/interval/test_construction.py,
     pandas/tests/indexes/interval/test_interval_new.py,
     pandas/tests/indexes/interval/test_interval.py,
@@ -214,16 +213,6 @@ skip=
     pandas/tests/indexes/timedeltas/test_partial_slicing.py,
     pandas/tests/indexes/timedeltas/test_timedelta_range.py,
     pandas/tests/indexes/timedeltas/test_ops.py,
-    pandas/tests/series/test_duplicates.py,
-    pandas/tests/series/indexing/test_callable.py,
-    pandas/tests/arrays/test_datetimelike.py,
-    pandas/tests/arrays/test_integer.py,
-    pandas/tests/arrays/test_interval.py,
-    pandas/tests/arrays/categorical/test_missing.py,
-    pandas/tests/arrays/categorical/test_sorting.py,
-    pandas/tests/util/test_testing.py,
-    pandas/tests/util/test_util.py,
-    pandas/tests/util/test_hashing.py,
     pandas/tests/io/test_clipboard.py,
     pandas/tests/io/test_compression.py,
     pandas/tests/io/test_pytables.py,