diff --git a/test-style-requirements.txt b/test-style-requirements.txt
index 75e6084cf..3f01c825a 100644
--- a/test-style-requirements.txt
+++ b/test-style-requirements.txt
@@ -2,3 +2,4 @@ Pygments  # required by collective.checkdocs
 collective.checkdocs
 black
 flake8
+flake8-docstrings