diff --git a/.zuul.yaml b/.zuul.yaml
index d628f030..e4f153cf 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -5,7 +5,9 @@
       Run unit tests for oslo.db with main branch of important libs.
       Takes advantage of the base tox job's install-siblings feature.
     # The job only tests the latest and shouldn't be run on the stable branches
-    branches: ^(?!stable)
+    branches:
+      regex: ^stable
+      negate: true
     required-projects:
       - name: github.com/sqlalchemy/sqlalchemy
         override-checkout: main
@@ -23,7 +25,9 @@
       Run unit tests for oslo.db with main branch of important libs.
       Takes advantage of the base tox job's install-siblings feature.
     # The job only tests the latest and shouldn't be run on the stable branches
-    branches: ^(?!stable)
+    branches:
+      regex: ^stable
+      negate: true
     required-projects:
       - name: github.com/sqlalchemy/sqlalchemy
         override-checkout: main