diff --git a/tox.ini b/tox.ini
index 96d84f93391..bdedc2bd5dd 100644
--- a/tox.ini
+++ b/tox.ini
@@ -11,8 +11,8 @@ minversion = 1.9
 
 [testenv]
 commands =
-    {envpython} setup.py clean
-    {envpython} setup.py build_ext --inplace
+    make clean
+    {envpython} -m pip install --global-option="build_ext" --global-option="--inplace" .
     {envpython} selftest.py
     {envpython} -m pytest -W always {posargs}
 deps =