diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 06172185a..d28da1afa 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -18,6 +18,11 @@ on:
 env:
   PYTEST_ADDOPTS: "--color=yes"
 
+# Cancel running jobs for the same workflow and branch.
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 # Set permissions at the job level.
 permissions: {}