diff --git a/tox.ini b/tox.ini
index d48d79be6..9efeea5e5 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [pytest]
-addopts=--tb=short
+addopts=--tb=short --strict
 
 [tox]
 envlist =