small change

charlesdong1991 · charlesdong1991 · commit bfb3fa846b33 · 2019-02-23T20:48:50.000+01:00
diff --git a/pandas/tests/test_strings.py b/pandas/tests/test_strings.py
@@ -3431,4 +3431,4 @@ def test_casefold(self):
         exp = s.str.casefold()
 
         assert isinstance(exp, Series)
-        assert_series_equal(exp, values)
+        tm.assert_series_equal(exp, values)
