diff --git a/.github/workflows/ratio_tests.yml b/.github/workflows/ratio_tests.yml
index d79e289..4304c02 100644
--- a/.github/workflows/ratio_tests.yml
+++ b/.github/workflows/ratio_tests.yml
@@ -1,6 +1,6 @@
 on:
   pull_request:
-    branches: [ main ]
+    branches: [ master ]
   workflow_dispatch:
 
 name: Ratio tests, ubuntu stable