diff --git a/eslint.config.mjs b/eslint.config.mjs
index abedf47..3ab4df5 100644
--- a/eslint.config.mjs
+++ b/eslint.config.mjs
@@ -33,6 +33,7 @@ const plugins = {
 };
 
 export const baseRules = {
+  "@typescript-eslint/no-floating-promises": "error",
   "@typescript-eslint/no-unused-vars": [
     2,
     { args: "none", caughtErrors: "none" },
@@ -184,6 +185,9 @@ const languageOptions = {
   parser: tsParser,
   ecmaVersion: 9,
   sourceType: "module",
+  parserOptions: {
+    project: path.join(fileURLToPath(import.meta.url), "..", "tsconfig.all.json"),
+  }
 };
 
 export default [
diff --git a/src/program.ts b/src/program.ts
index f8a3870..17e074a 100644
--- a/src/program.ts
+++ b/src/program.ts
@@ -74,7 +74,7 @@ function setupExitWatchdog(serverList: ServerList) {
 
 program.parse(process.argv);
 
-async function startSSEServer(port: number, serverList: ServerList) {
+function startSSEServer(port: number, serverList: ServerList) {
   const sessions = new Map<string, SSEServerTransport>();
   const httpServer = http.createServer(async (req, res) => {
     if (req.method === 'POST') {
diff --git a/tests/fixtures.ts b/tests/fixtures.ts
index 5fd4c46..43b8d9b 100644
--- a/tests/fixtures.ts
+++ b/tests/fixtures.ts
@@ -53,7 +53,7 @@ export const test = baseTest.extend<TestFixtures, WorkerFixtures>({
     const userDataDir = testInfo.outputPath('user-data-dir');
     let client: StdioClientTransport | undefined;
 
-    use(async options => {
+    await use(async options => {
       const args = ['--user-data-dir', userDataDir];
       if (mcpHeadless)
         args.push('--headless');
diff --git a/tests/network.spec.ts b/tests/network.spec.ts
index b202903..45c3280 100644
--- a/tests/network.spec.ts
+++ b/tests/network.spec.ts
@@ -42,8 +42,8 @@ test('browser_network_requests', async ({ client, server }) => {
     },
   });
 
-  expect.poll(() => client.callTool({
+  await expect.poll(() => client.callTool({
     name: 'browser_network_requests',
     arguments: {},
-  })).toHaveTextContent(`[GET] http://localhost:8907/json => [200] OK`);
+  })).toHaveTextContent(`[GET] http://localhost:${server.PORT}/json => [200] OK`);
 });
diff --git a/tsconfig.all.json b/tsconfig.all.json
new file mode 100644
index 0000000..2e60f02
--- /dev/null
+++ b/tsconfig.all.json
@@ -0,0 +1,4 @@
+{
+  "extends": "./tsconfig.json",
+  "include": ["**/*.ts", "**/*.js"],
+}