diff --git a/pandas/tests/test_base.py b/pandas/tests/test_base.py
index 071d609c6e44e..a30ce9a7dcd87 100644
--- a/pandas/tests/test_base.py
+++ b/pandas/tests/test_base.py
@@ -99,12 +99,12 @@ def setUp(self):
 
     def test_shallow_copying(self):
         original = self.container.copy()
-        assert_isinstance(self.container.view(), FrozenNDArray)
-        self.assertFalse(isinstance(self.container.view(np.ndarray), FrozenNDArray))
+        self.assertIsInstance(self.container.view(), FrozenNDArray)
+        self.assertNotIsInstance(self.container.view(np.ndarray), FrozenNDArray)
         self.assertIsNot(self.container.view(), self.container)
         self.assert_numpy_array_equal(self.container, original)
         # shallow copy should be the same too
-        assert_isinstance(self.container._shallow_copy(), FrozenNDArray)
+        self.assertIsInstance(self.container._shallow_copy(), FrozenNDArray)
         # setting should not be allowed
         def testit(container): container[0] = 16
 
diff --git a/pandas/tests/test_categorical.py b/pandas/tests/test_categorical.py
index e4d7ef2f9a8c6..5df3cb4403c12 100644
--- a/pandas/tests/test_categorical.py
+++ b/pandas/tests/test_categorical.py
@@ -1,4 +1,4 @@
-# pylint: disable=E1101,E1103,W0232
+#pylint: disable=E1101,E1103,W0232
 
 from datetime import datetime
 from pandas.compat import range, lrange, u
diff --git a/pandas/tests/test_testing.py b/pandas/tests/test_testing.py
index c3c1c4f5977e6..055b5816120a1 100644
--- a/pandas/tests/test_testing.py
+++ b/pandas/tests/test_testing.py
@@ -10,6 +10,7 @@
 from pandas.util.testing import (
     assert_almost_equal, assertRaisesRegexp, raise_with_traceback, assert_series_equal
 )
+from pandas.util import testing
 
 # let's get meta.
 
@@ -153,3 +154,11 @@ def test_not_equal(self):
         # ATM meta data is not checked in assert_series_equal
         # self._assert_not_equal(Series(range(3)),Series(range(3),name='foo'),check_names=True)
 
+
+class TestAssertNumpyArrayEquals(testing.TestCase):
+    
+    def test_equal(self):
+        np_array = np.array([1, 2, 3])
+        equal_array = np.array([1, 2, 3])
+        self.assert_numpy_array_equal(np_array, equal_array)
+