diff --git a/.github/workflows/ci-rsc.yml b/.github/workflows/ci-rsc.yml
index b21b0d0b3..19107c4da 100644
--- a/.github/workflows/ci-rsc.yml
+++ b/.github/workflows/ci-rsc.yml
@@ -63,7 +63,7 @@ jobs:
       - run: pnpm -C packages/plugin-rsc exec playwright install ${{ matrix.browser }}
       - run: pnpm -C packages/plugin-rsc test-e2e-ci --project=${{ matrix.browser }}
         env:
-          TEST_ISOLATED: true
+          TEST_ISOLATED: ${{ matrix.os != 'windows-latest' }}
       - uses: actions/upload-artifact@v4
         if: always()
         with:
diff --git a/packages/plugin-rsc/e2e/basic.test.ts b/packages/plugin-rsc/e2e/basic.test.ts
index a1ef08495..77066ce42 100644
--- a/packages/plugin-rsc/e2e/basic.test.ts
+++ b/packages/plugin-rsc/e2e/basic.test.ts
@@ -105,7 +105,7 @@ test.describe('build-react-compiler', () => {
 
 test.describe(() => {
   // disabled by default
-  if (!process.env.TEST_ISOLATED) return
+  if (process.env.TEST_ISOLATED !== 'true') return
 
   let tmpRoot = '/tmp/test-vite-rsc'
   test.beforeAll(async () => {