diff --git a/appveyor.yml b/appveyor.yml
index 5db1a9f..a5b3768 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -6,4 +6,4 @@ install:
 - pip install .[test]
 
 test_script:
-- tox
+- python -m tox
diff --git a/setup.cfg b/setup.cfg
index 8f33254..63f313a 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -26,5 +26,6 @@ keywords =
 [options.extras_require]
 test =
     coverage
+    tox
     setuptools>=38.0
     
\ No newline at end of file