diff --git a/.github/workflows/ci-dgraph4j-tests.yml b/.github/workflows/ci-dgraph4j-tests.yml
index b67fa3f..387919b 100644
--- a/.github/workflows/ci-dgraph4j-tests.yml
+++ b/.github/workflows/ci-dgraph4j-tests.yml
@@ -10,11 +10,15 @@ on:
       - reopened
       - synchronize
       - ready_for_review
-    branches:
-      - main
   schedule:
     - cron: 0 0 * * *
 
+# Supersede an in-flight run when a pull request is pushed again. Never cancels a
+# main-branch or scheduled run.
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.ref }}
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
+
 permissions:
   contents: read
 
diff --git a/.github/workflows/trunk.yml b/.github/workflows/trunk.yml
index d57563b..158cfd5 100644
--- a/.github/workflows/trunk.yml
+++ b/.github/workflows/trunk.yml
@@ -1,7 +1,10 @@
 name: Trunk Code Quality
 on:
   pull_request:
-    branches: main
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.ref }}
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
 
 permissions:
   contents: read