diff --git a/tox.ini b/tox.ini
--- a/tox.ini
+++ b/tox.ini
@@ -3,7 +3,7 @@
 
 [testenv:py3]
 deps =
-  -r requirements-test.txt
+  .[testing]
   pytest-cov
 commands =
   pytest --cov=swh --cov-branch {posargs}