diff --git a/tests/nightly/model_backwards_compatibility_check/common.py b/tests/nightly/model_backwards_compatibility_check/common.py
index c41b11faf081..afdefc937d60 100644
--- a/tests/nightly/model_backwards_compatibility_check/common.py
+++ b/tests/nightly/model_backwards_compatibility_check/common.py
@@ -32,7 +32,6 @@
 try:
     cmp             # Python 2
 except NameError:
-    # See: https://docs.python.org/3.0/whatsnew/3.0.html#ordering-comparisons
     def cmp(x, y):  # Python 3
         return (x > y) - (x < y)