diff --git a/tox.ini b/tox.ini
index 96bcabcf8..ce55521c2 100644
--- a/tox.ini
+++ b/tox.ini
@@ -20,7 +20,7 @@ setenv =
 commands =
     openssl version
     coverage run --parallel -m OpenSSL.debug
-    coverage run --parallel -m pytest -v -s -k TestDTLS {posargs}
+    coverage run --parallel -m pytest -v -s {posargs}
 
 [testenv:py37-twistedTrunk]
 deps =