diff --git a/test-requirements.txt b/test-requirements.txt
index be225d8..23614af 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -8,3 +8,4 @@
 # hacking to 3.2.0 or above. hacking 3.2.0 takes
 # care of pyflakes version compatibilty.
 pyflakes>=2.1.1
+stestr>=2.0.0 # Apache-2.0