diff --git a/tox.ini b/tox.ini
index 5446a85d..c766bb12 100644
--- a/tox.ini
+++ b/tox.ini
@@ -20,7 +20,7 @@ envlist =
 #use_frozen_constraints = true
 #basepython=python
 deps =
-    -r{toxinidir}/requirements.txt
+    -r{toxinidir}/requirements.txt -r{toxinidir}/requirements-dev.txt
 setenv =
     PYTHONPATH = {toxinidir}:{toxinidir}/related
 commands =