diff --git a/lower-constraints.txt b/lower-constraints.txt
index c01169ad8b69..f4640c6e52d7 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -149,7 +149,7 @@ tenacity==6.3.1
 testrepository==0.0.20
 testresources==2.0.0
 testscenarios==0.4
-testtools==2.2.0
+testtools==2.5.0
 tooz==1.58.0
 traceback2==1.4.0
 types-paramiko==0.1.3
diff --git a/test-requirements.txt b/test-requirements.txt
index 44cb2bacf79d..3f3c1c0cb5e6 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -19,7 +19,7 @@ stestr>=2.0.0 # Apache-2.0
 osprofiler>=1.4.0 # Apache-2.0
 testresources>=2.0.0 # Apache-2.0/BSD
 testscenarios>=0.4 # Apache-2.0/BSD
-testtools>=2.2.0 # MIT
+testtools>=2.5.0 # MIT
 bandit>=1.1.0 # Apache-2.0
 gabbi>=1.35.0 # Apache-2.0
 wsgi-intercept>=1.7.0 # MIT License