diff --git a/test-requirements.txt b/test-requirements.txt
index c699d8c..3cd55cb 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -4,4 +4,7 @@
 
 # Hacking already pins down pep8, pyflakes and flake8
 hacking!=0.13.0,<0.14,>=0.12.0 # Apache-2.0
-
+# remove this pyflakes from here once you bump the
+# hacking to 3.2.0 or above. hacking 3.2.0 takes
+# care of pyflakes version compatibilty.
+pyflakes>=2.1.1