diff --git a/.github/workflows/sources.yaml b/.github/workflows/sources.yaml
index 7e6712d74..30eacfec7 100644
--- a/.github/workflows/sources.yaml
+++ b/.github/workflows/sources.yaml
@@ -4,8 +4,8 @@ on:
   push:
     branches: [ main ]
   # Uncomment to test changes on a PR branch
-  # pull_request:
-  #   branches: [ main ]
+  pull_request:
+    branches: [ main ]
   schedule:  # 05:00 UTC = 06:00 CET = 07:00 CEST
   - cron: "0 5 * * *"