diff --git a/tests/requirements-py3.txt b/tests/requirements-py3.txt
index cac8da9b5..a709a734e 100644
--- a/tests/requirements-py3.txt
+++ b/tests/requirements-py3.txt
@@ -1,4 +1,4 @@
-pytest>=2.6.0
+pytest==2.7.3
 pytest-twisted
 pytest-cov
 testfixtures
diff --git a/tests/requirements.txt b/tests/requirements.txt
index f88d17538..8901fe16b 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
 pytest-cov
 jmespath