diff --git a/test-requirements.txt b/test-requirements.txt
index eeea491e03..57963854a6 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -18,3 +18,4 @@ testscenarios>=0.4 # Apache-2.0/BSD
 WebTest>=2.0.27 # MIT
 bashate>=0.5.1 # Apache-2.0
 flake8-import-order>=0.13 # LGPLv3
+pycodestyle<=2.3.1