diff --git a/tools/test-requires b/tools/test-requires
index cad8d061..4589900f 100644
--- a/tools/test-requires
+++ b/tools/test-requires
@@ -1,5 +1,6 @@
-# Fix versions for pep8/flake8/hacking
+# Fix versions for pep8/pyflakes/flake8/hacking
 pep8==1.4.5
+pyflakes==0.7.2
 flake8==2.0
 hacking>=0.5.6,<0.6