diff --git a/tox.ini b/tox.ini
index e587774323171dda590c4e9198e049c1ed0e0e14..36807a619a9536a02908c36364e02ba52c1a0d69 100644
--- a/tox.ini
+++ b/tox.ini
@@ -16,6 +16,9 @@ commands = caosdb-crawler --help
 [flake8]
 max-line-length = 100
 
+[pycodestyle]
+max-line-length = 100
+
 [pytest]
 testpaths = unittests
-xfail_strict = True
\ No newline at end of file
+xfail_strict = True