diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index c1933a51..4d6234da 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -22,7 +22,8 @@ on:
   workflow_dispatch:
 
 concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
+  # A delayed draft synchronize event must not cancel ready-for-review tests.
+  group: ${{ github.workflow }}-${{ github.ref }}-draft-${{ github.event.pull_request.draft }}
   cancel-in-progress: true
 
 env: