diff --git a/tox.ini b/tox.ini
index e3fb197e2..7813ac5e6 100644
--- a/tox.ini
+++ b/tox.ini
@@ -18,6 +18,7 @@ commands = python setup.py testr --slowest --testr-args='--concurrency 1 {posarg
 
 [testenv:py27]
 setenv = ZAQAR_TEST_MONGODB=1
+         ZAQAR_TEST_SLOW=1
 
 [testenv:py33]
 deps = -r{toxinidir}/requirements-py3.txt