fixup! Add a regression test for the timezone issue

Author: grigoriosgiann

pandas/tests/indexing/test_datetime.py

@@ -360,15 +360,14 @@ def test_loc_label_slicing(self):
     def test_apply_datetime_tz_issue(self):
         # GH 29052
 
-        df = DataFrame(
-            data=[0, 1, 2],
-            index=[
-                pd.Timestamp("2019-03-15 12:34:31.909000+0000", tz="UTC"),
-                pd.Timestamp("2019-03-15 12:34:34.359000+0000", tz="UTC"),
-                pd.Timestamp("2019-03-15 12:34:34.660000+0000", tz="UTC"),
-            ],
-        )
-        df2 = df.apply(lambda x: x.name, axis=1)
+        timestamps = [
+            pd.Timestamp("2019-03-15 12:34:31.909000+0000", tz="UTC"),
+            pd.Timestamp("2019-03-15 12:34:34.359000+0000", tz="UTC"),
+            pd.Timestamp("2019-03-15 12:34:34.660000+0000", tz="UTC"),
+        ]
+        df = DataFrame(data=[0, 1, 2], index=timestamps)
+        result = df.apply(lambda x: x.name, axis=1)
+        expected = pd.Series(index=timestamps, data=timestamps)
+
+        tm.assert_series_equal(result, expected)
 
-        assert df[0].keys().dtype == df2.dtypes
-        assert (df[0].keys().values == df2.values).all()