diff --git a/tox.ini b/tox.ini
index 2c547c5..b3de384 100644
--- a/tox.ini
+++ b/tox.ini
@@ -14,7 +14,12 @@ python =
 [testenv]
 setenv =
     PYTHONPATH = {toxinidir}:{toxinidir}/pipreqs
-commands = python -m unittest discover
+commands = 
+    python -m unittest discover
+
+[testenv:flake8]
+deps = flake8
+commands = flake8 pipreqs tests
 
 [flake8]
 exclude =