diff --git a/.github/workflows/test_destination_synapse.yml b/.github/workflows/test_destination_synapse.yml
index 8111f76ae0..e86e29ebf6 100644
--- a/.github/workflows/test_destination_synapse.yml
+++ b/.github/workflows/test_destination_synapse.yml
@@ -1,6 +1,11 @@
 name: test synapse
 
 on:
+  pull_request:
+    branches:
+      - master
+      - devel
+      
   workflow_dispatch:
   
 env:
@@ -15,6 +20,16 @@ env:
 
 jobs:
 
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Check source branch name
+      run: |
+        if [[ "${{ github.head_ref }}" != "synapse" ]]; then
+          exit 1
+        fi
+
   run_loader:
     name: Tests Synapse loader
     strategy:
@@ -76,4 +91,4 @@ jobs:
       - name: Check matrix job results
         if: contains(needs.*.result, 'failure') || contains(needs.*.result, 'cancelled')
         run: |
-          echo "One or more matrix job tests failed or were cancelled. You may need to re-run them." && exit 1
\ No newline at end of file
+          echo "One or more matrix job tests failed or were cancelled. You may need to re-run them." && exit 1