1 files changed, 1 insertions, 1 deletions

diff --git a/tox.ini b/tox.ini
index 257275ce..56603da2 100644
--- a/tox.ini
+++ b/tox.ini
@@ -7,7 +7,7 @@ deps =
     coverage
     pretend
 commands =
-    coverage run --source=cryptography/,tests/ -m pytest
+    coverage run --source=cryptography/,tests/ -m pytest --strict
     coverage report -m
 
 [testenv:docs]