diff --git a/dev-requirements.txt b/dev-requirements.txt
index a1eda389413..bf928b0a620 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -1,6 +1,7 @@
 https://github.com/spulec/freezegun/archive/master.zip#egg=freezegun
 pretend
-pytest
+# Pinned to 2.7.2 to avoid an issue with parallel builds
+pytest==2.7.2
 pytest-capturelog
 pytest-timeout
 pytest-xdist