1 files changed, 1 insertions, 1 deletions
diff --git a/tox.ini b/tox.ini
index cf4912b..2d41636 100644
--- a/tox.ini
+++ b/tox.ini
@@ -19,7 +19,7 @@ commands =
     openssl version
     python -c "import OpenSSL.SSL; print(OpenSSL.SSL.SSLeay_version(OpenSSL.SSL.SSLEAY_VERSION))"
     python -c "import cryptography; print(cryptography.__version__)"
-    coverage run --parallel -m pytest tests
+    coverage run --parallel -m pytest {posargs}
 
 [testenv:py27-twistedMaster]
 deps =