diff --git a/tox.ini b/tox.ini
index 7aa6a3f3f..b191cb313 100644
--- a/tox.ini
+++ b/tox.ini
@@ -30,7 +30,7 @@ deps =
         -rrequirements/requirements-testing.txt
 
 [testenv:dist]
-commands = ./runtests.py --no-pkgroot --staticfiles {posargs}
+commands = python -W error::DeprecationWarning -W error::PendingDeprecationWarning runtests.py --no-pkgroot --staticfiles {posargs}
 deps =
         django
         -rrequirements/requirements-testing.txt