diff --git a/.gitreview b/.gitreview
index e26745728..6c2c2742e 100644
--- a/.gitreview
+++ b/.gitreview
@@ -2,3 +2,4 @@
 host=review.opendev.org
 port=29418
 project=openstack/python-keystoneclient.git
+defaultbranch=stable/2025.2
diff --git a/tox.ini b/tox.ini
index 0b178f5e2..89f90213b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -10,7 +10,7 @@ setenv = OS_STDOUT_NOCAPTURE=False
          OS_STDERR_NOCAPTURE=False
 
 deps =
-       -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
+       -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/2025.2}
        -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 commands = find . -type f -name "*.pyc" -delete