Actually (hopefully) fix test failure on 2.7

Author: pitrou

pandas/tests/indexing/test_ix.py

@@ -19,11 +19,15 @@ class TestIX(object):
     def test_ix_deprecation(self):
         # GH 15114
 
+        # Use inner function so that the warning is not masked by a previous
+        # occurrence (stacklevel may be off?)
+        def inner(df):
+            df.ix[1, 'A']
+
         df = DataFrame({'A': [1, 2, 3]})
         with tm.assert_produces_warning(DeprecationWarning,
-                                        check_stacklevel=False,
-                                        clear=[pd.core.indexing]):
-            df.ix[1, 'A']
+                                        check_stacklevel=False):
+            inner(df)
 
     def test_ix_loc_setitem_consistency(self):