diff --git a/tox.ini b/tox.ini
index c23aca0..8fa3a22 100644
--- a/tox.ini
+++ b/tox.ini
@@ -10,7 +10,7 @@ commands =
 [testenv:py3-win]
 platform = win
 commands =
-    python pip install pywin32
+    python -m pip install pywin32
     python setup.py test --test-suite tests.TestSuite
 
 [testenv:py27]