diff --git a/tox.ini b/tox.ini
index 806219898..8b4c9e875 100644
--- a/tox.ini
+++ b/tox.ini
@@ -15,7 +15,7 @@ deps =
     leveldb
     -rtests/requirements.txt
 commands =
-    py.test --cov=scrapy {posargs:scrapy tests}
+    py.test --cov=scrapy --cov-report= {posargs:scrapy tests}
 
 [testenv:precise]
 basepython = python2.7
@@ -34,7 +34,7 @@ basepython = python2.7
 commands =
     pip install -U https://github.com/scrapy/w3lib/archive/master.zip#egg=w3lib
     pip install -U https://github.com/scrapy/queuelib/archive/master.zip#egg=queuelib
-    py.test --cov=scrapy {posargs:scrapy tests}
+    py.test --cov=scrapy --cov-report= {posargs:scrapy tests}
 
 [testenv:py33]
 basepython = python3.3