diff --git a/.github/workflows/test-gradle.yml b/.github/workflows/test-gradle.yml
index 3b9034053f..204e5db9e1 100644
--- a/.github/workflows/test-gradle.yml
+++ b/.github/workflows/test-gradle.yml
@@ -5,9 +5,9 @@ name: Java CI with Gradle
 
 on:
   push:
-    branches: [ trunk ]
+    branches: [ trunk, 5.5.x ]
   pull_request:
-    branches: [ trunk ]
+    branches: [ trunk, 5.5.x ]
 
 permissions: {}