diff --git a/dev-requirements.txt b/dev-requirements.txt
index bf928b0a620..3c4815c5b7b 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -3,7 +3,8 @@ pretend
 # Pinned to 2.7.2 to avoid an issue with parallel builds
 pytest==2.7.2
 pytest-capturelog
-pytest-timeout
+# Pinned to 0.5 to stay compatible with pytest==2.7.2
+pytest-timeout==0.5
 pytest-xdist
 mock<1.1
 scripttest>=1.3