diff --git a/pandas/tests/reshape/merge/test_merge.py b/pandas/tests/reshape/merge/test_merge.py
index 8fc38958a4509d..8886cb7b61add5 100644
--- a/pandas/tests/reshape/merge/test_merge.py
+++ b/pandas/tests/reshape/merge/test_merge.py
@@ -2085,6 +2085,7 @@ def test_merge_equal_cat_dtypes2():
 
 
 def test_right_merge_preserves_row_order():
+    # GH 27453
     population = [
         ("Jenn", "Jamaica", 3),
         ("Beth", "Bulgaria", 7),
@@ -2111,6 +2112,7 @@ def test_right_merge_preserves_row_order():
 
 
 def test_left_merge_preserves_row_order():
+    # GH 27453
     population = [
         ("Jenn", "Jamaica", 3),
         ("Beth", "Bulgaria", 7),