diff --git a/test-requirements.txt b/test-requirements.txt
index e0a95edb7..f924f319f 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -5,3 +5,4 @@ oslotest
 sphinx>=2.0.0,!=2.1.0 # BSD
 testrepository>=0.0.18
 reno>=3.1.0 # Apache-2.0
+pyflakes>=2.2.0