diff --git a/.github/workflows/ci-bundling-trial.yml b/.github/workflows/ci-bundling-trial.yml
index d476c07597..06dc47de82 100644
--- a/.github/workflows/ci-bundling-trial.yml
+++ b/.github/workflows/ci-bundling-trial.yml
@@ -417,5 +417,6 @@ jobs:
           GEMINI_API_KEY: '${{ secrets.GEMINI_API_KEY }}'
           KEEP_OUTPUT: 'true'
           VERBOSE: 'true'
+          USE_PUBLISHED_PACKAGES: 'true'
         run: 'npm run test:integration:sandbox:none'
         shell: 'pwsh'
diff --git a/integration-tests/vitest.config.ts b/integration-tests/vitest.config.ts
index bf552c61e2..190a84264e 100644
--- a/integration-tests/vitest.config.ts
+++ b/integration-tests/vitest.config.ts
@@ -14,9 +14,12 @@ export default defineConfig({
     environment: 'node',
     setupFiles: ['./globalSetup.ts'],
     globalSetup: ['./globalSetup.ts'],
-    alias: {
-      '@google/gemini-cli-core': '@google-gemini/gemini-cli-core',
-    },
+    alias:
+      process.env.USE_PUBLISHED_PACKAGES === 'true'
+        ? {
+            '@google/gemini-cli-core': '@google-gemini/gemini-cli-core',
+          }
+        : {},
     reporters: ['default'],
     include: ['**/*.test.ts'],
     retry: 2,