diff --git a/requirements/test_requirements.txt b/requirements/test_requirements.txt
index c6b54e4..975d789 100644
--- a/requirements/test_requirements.txt
+++ b/requirements/test_requirements.txt
@@ -1,4 +1,4 @@
 mock
-pytest
+pytest==3.4.1
 pytest-cov
 flake8