diff --git a/tox.ini b/tox.ini
index fb31762d8..4d8236b4e 100644
--- a/tox.ini
+++ b/tox.ini
@@ -14,6 +14,10 @@ deps =
     Pillow != 3.0.0
     leveldb
     -rtests/requirements.txt
+passenv =
+    FEEDTEST_S3_URI
+    AWS_ACCESS_KEY_ID
+    AWS_SECRET_ACCESS_KEY
 commands =
     py.test --cov=scrapy --cov-report= {posargs:scrapy tests}