diff --git a/test-requirements.txt b/test-requirements.txt
index b891eae8..d4986482 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,4 +1,4 @@
 bashate >= 0.2
 PyYAML >= 3.1.0
 yamllint >= 0.5.2
-flake8 >= 2.5.4 # MIT
+flake8 < 3.6.0