diff --git a/requirements/test.txt b/requirements/test.txt
index 89358f7f76..0a0ebb1b8f 100644
--- a/requirements/test.txt
+++ b/requirements/test.txt
@@ -3,6 +3,7 @@
 
 black==19.10b0  #conda: black=19.10b0
 filelock
+pillow<7
 imagehash>=4.0
 nose
 pre-commit