diff --git a/crates/vt_bin/tests/e2e_snapshots/fixtures/vitest_browser_cache/vitest.config.js b/crates/vt_bin/tests/e2e_snapshots/fixtures/vitest_browser_cache/vitest.config.js
index 1604a770d..41da653f3 100644
--- a/crates/vt_bin/tests/e2e_snapshots/fixtures/vitest_browser_cache/vitest.config.js
+++ b/crates/vt_bin/tests/e2e_snapshots/fixtures/vitest_browser_cache/vitest.config.js
@@ -7,6 +7,24 @@ class NoTestSummaryReporter extends DefaultReporter {
 }
 
 export default defineConfig({
+  plugins: [
+    {
+      name: 'browser-server-port',
+      // Vitest's fixed default browser server port (63315) can fall inside a
+      // Windows excluded port range, where listening fails with EACCES and
+      // Vite does not fall back to another port. Port 0 lets the OS choose.
+      // Vitest replaces `test.api.port: 0` with the default and prints an
+      // "API started at" line when `test.api` is set, so override the port
+      // after Vitest resolves `test.api`.
+      enforce: 'post',
+      config: {
+        order: 'post',
+        handler(config) {
+          config.test.api.port = 0;
+        },
+      },
+    },
+  ],
   test: {
     reporters: [new NoTestSummaryReporter({ summary: false }), 'json'],
     outputFile: { json: 'dist/result.json' },