diff --git a/tox.ini b/tox.ini
index 0457fe64d..e35949b65 100644
--- a/tox.ini
+++ b/tox.ini
@@ -16,7 +16,8 @@ setenv =
 passenv =
     USER
 deps =
-    pytest
+    py2: pytest
+    py3: pytest>=3.6,<5
     pytest-mock
     pytest-cov
     pytest-django