[test] Use a reserved port

The port 1337 might be open.

test/websocket.test.js

@@ -2813,16 +2813,17 @@ describe('WebSocket', () => {
     });
 
     it('can be called from an error listener while connecting', (done) => {
-      const ws = new WebSocket('ws://localhost:1337');
+      const codes = ['ECONNREFUSED', 'ETIMEDOUT'];
+      const ws = new WebSocket('ws://localhost:270');
 
       ws.on('open', () => done(new Error("Unexpected 'open' event")));
       ws.on('error', (err) => {
         assert.ok(err instanceof Error);
-        assert.strictEqual(err.code, 'ECONNREFUSED');
+        assert.ok(codes.includes(err.code), `Unexpected code: ${err.code}`);
         ws.close();
         ws.on('close', () => done());
       });
-    }).timeout(4000);
+    });
 
     it("can be called from a listener of the 'redirect' event", (done) => {
       const server = http.createServer();
@@ -3087,16 +3088,17 @@ describe('WebSocket', () => {
     });
 
     it('can be called from an error listener while connecting', (done) => {
-      const ws = new WebSocket('ws://localhost:1337');
+      const codes = ['ECONNREFUSED', 'ETIMEDOUT'];
+      const ws = new WebSocket('ws://localhost:270');
 
       ws.on('open', () => done(new Error("Unexpected 'open' event")));
       ws.on('error', (err) => {
         assert.ok(err instanceof Error);
-        assert.strictEqual(err.code, 'ECONNREFUSED');
+        assert.ok(codes.includes(err.code), `Unexpected code: ${err.code}`);
         ws.terminate();
         ws.on('close', () => done());
       });
-    }).timeout(4000);
+    });
 
     it("can be called from a listener of the 'redirect' event", (done) => {
       const server = http.createServer();