1 files changed, 3 insertions, 7 deletions
diff --git a/coverage/backunittest.py b/coverage/backunittest.py
index 21d7bcb2..242e9d39 100644
--- a/coverage/backunittest.py
+++ b/coverage/backunittest.py
@@ -20,13 +20,9 @@ class TestCase(unittest.TestCase):
     """
     # pylint: disable=missing-docstring
 
-    # Many Pythons have this method defined.  But PyPy3 has a bug with it
-    # somehow (https://bitbucket.org/pypy/pypy/issues/2092), so always use our
-    # own implementation that works everywhere, at least for the ways we're
-    # calling it.
-    def assertCountEqual(self, s1, s2):
-        """Assert these have the same elements, regardless of order."""
-        self.assertEqual(sorted(s1), sorted(s2))
+    if not unittest_has('assertCountEqual'):
+        def assertCountEqual(self, *args, **kwargs):
+            return self.assertItemsEqual(*args, **kwargs)
 
     if not unittest_has('assertRaisesRegex'):
         def assertRaisesRegex(self, *args, **kwargs):