diff --git a/pandas/util/testing.py b/pandas/util/testing.py
index 9697c991122dd..8deb056d2bd15 100644
--- a/pandas/util/testing.py
+++ b/pandas/util/testing.py
@@ -1348,7 +1348,9 @@ def assert_frame_equal(left, right, check_dtype=True,
     check_categorical : bool, default True
         Whether to compare internal Categorical exactly.
     check_like : bool, default False
-        If true, ignore the order of rows & columns
+        If True, ignore the order of index & columns.
+        Note: index labels must match their respective rows
+        (same as in columns) - same labels must be with the same data
     obj : str, default 'DataFrame'
         Specify object name being compared, internally used to show appropriate
         assertion message