diff --git a/tox.ini b/tox.ini
index ed0d4c9ab..b62100026 100644
--- a/tox.ini
+++ b/tox.ini
@@ -99,7 +99,7 @@ commands =
 
 [asyncio]
 commands =
-    py.test --cov=scrapy --cov-report= --reactor=asyncio {posargs:scrapy tests}
+    {[testenv]commands} --reactor=asyncio
 
 [testenv:py35-asyncio]
 basepython = python3.5