diff --git a/.configs/vitest.config.mjs b/.configs/vitest.config.mjs
index fd5fc29..6665771 100644
--- a/.configs/vitest.config.mjs
+++ b/.configs/vitest.config.mjs
@@ -7,7 +7,7 @@ const root = path.resolve(path.dirname(fileURLToPath(import.meta.url)), "..");
 export default defineConfig({
 	root,
 	test: {
-		include: ["tests/**/*.test.mjs"],
+		include: ["tests/**/*.test.vitest.mjs"],
 		exclude: ["node_modules"],
 		environment: "node",
 		testTimeout: 30000,
diff --git a/tests/port-fallback.test.mjs b/tests/port-fallback.test.vitest.mjs
similarity index 96%
rename from tests/port-fallback.test.mjs
rename to tests/port-fallback.test.vitest.mjs
index af99ee3..d80ccff 100644
--- a/tests/port-fallback.test.mjs
+++ b/tests/port-fallback.test.vitest.mjs
@@ -4,7 +4,7 @@
  *     const port = process.env.PORT || 3000;
  *     app.listen(port, '0.0.0.0', () => console.log(`WOL proxy on port ${port}`));
  *
- * `tests/wake-endpoint.test.mjs` covers the `process.env.PORT` (truthy) branch by
+ * `tests/wake-endpoint.test.vitest.mjs` covers the `process.env.PORT` (truthy) branch by
  * setting `PORT=0` for an ephemeral real bind. This file covers the `|| 3000`
  * fallback branch (PORT unset) in a separate process (the OOM-safe runner spawns
  * one vitest child process per test file, so env vars and the CJS `require.cache`
diff --git a/tests/run-vitest.mjs b/tests/run-vitest.mjs
index d6c32ba..8dbdb5e 100644
--- a/tests/run-vitest.mjs
+++ b/tests/run-vitest.mjs
@@ -26,7 +26,7 @@ const code = await run({
 	cwd: root,
 	testDir: "tests",
 	vitestConfig: ".configs/vitest.config.mjs",
-	testFilePattern: /\.test\.mjs$/,
+	testFilePattern: /\.test\.vitest\.mjs$/,
 	testPatterns,
 	workers,
 	coverageQuiet,
diff --git a/tests/wake-endpoint.test.mjs b/tests/wake-endpoint.test.vitest.mjs
similarity index 100%
rename from tests/wake-endpoint.test.mjs
rename to tests/wake-endpoint.test.vitest.mjs