diff --git a/.github/workflows/ci-bundling-trial.yml b/.github/workflows/ci-bundling-trial.yml
index 724ae3aa4d..1e89375f58 100644
--- a/.github/workflows/ci-bundling-trial.yml
+++ b/.github/workflows/ci-bundling-trial.yml
@@ -41,7 +41,7 @@ jobs:
           mode: 'source'
 
       - name: 'Run Suspect Tests'
-        run: 'npx vitest run packages/cli/src/ui/App.test.tsx packages/cli/src/test-utils/render.test.tsx packages/cli/src/test-utils/AppRig.test.tsx'
+        run: 'npx vitest run --pool=forks packages/cli/src/ui/App.test.tsx packages/cli/src/test-utils/render.test.tsx packages/cli/src/test-utils/AppRig.test.tsx'
         shell: 'bash'