diff --git a/tests/requirements.txt b/tests/requirements.txt
index 4f1520021..9dd0bd24a 100644
--- a/tests/requirements.txt
+++ b/tests/requirements.txt
@@ -2,6 +2,7 @@
 mock
 mitmproxy==0.10.1
 netlib==0.10.1
+pytest==2.7.3
 pytest-twisted
 jmespath
 testfixtures
diff --git a/tox.ini b/tox.ini
index ef2ff345d..ebc07181a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -47,7 +47,7 @@ deps =
     w3lib>=1.8.0
     Pillow
     # tests requirements
-    pytest>=2.6.0
+    pytest==2.7.3
     pytest-twisted
     testfixtures