diff --git a/tox.ini b/tox.ini
index ec8ea941..fee61c05 100644
--- a/tox.ini
+++ b/tox.ini
@@ -23,7 +23,7 @@ deps =
     flake8
 skip_install = True
 extras = None
-commands = flake8 --max-line-length 119 bigchaindb
+commands = flake8 --max-line-length 119 bigchaindb tests
 
 [testenv:docsroot]
 basepython = {[base]basepython}