cleanup test

Author: matiaslindgren

pandas/tests/indexing/multiindex/test_multiindex.py

@@ -259,10 +259,15 @@ def test_multiindex_assign_aligns_as_implicit_tuple(self):
         s1 = df1["A"].rolling(2).mean()
         s2 = df2["A"].rolling(2).mean()
         s3 = df3["A"].rolling(2).mean()
-        df1["C"] = s1
-        df1["C"] = s1
-        df1["C"] = s1
+
         df2["C"] = s2
         df3[("C", "")] = s3
+        tm.assert_frame_equal(df2, df3)
+
+        df1["C"] = s1
+        tm.assert_frame_equal(df1, df2)
+        tm.assert_frame_equal(df1, df3)
+
+        df1["C"] = s1
         tm.assert_frame_equal(df1, df2)
         tm.assert_frame_equal(df1, df3)