diff --git a/tests/conftest.py b/tests/conftest.py
index 262a7e9f1..f4db8f1f5 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -257,8 +257,8 @@ async def start():
         await runner.setup()
         site = aiohttp.web.TCPSite(runner, "localhost", 0)
         await site.start()
-        host, port = site._server.sockets[0].getsockname()
-        return site, f"http://{host}:{port}"
+        port = site._server.sockets[0].getsockname()[1]
+        return site, f"http://127.0.0.1:{port}"
 
     return start
 
diff --git a/tests/metagpt/tools/test_web_browser_engine.py b/tests/metagpt/tools/test_web_browser_engine.py
index 5620c8080..7a344e0ad 100644
--- a/tests/metagpt/tools/test_web_browser_engine.py
+++ b/tests/metagpt/tools/test_web_browser_engine.py
@@ -9,10 +9,10 @@
 
 @pytest.mark.asyncio
 @pytest.mark.parametrize(
-    "browser_type,",
+    "browser_type",
     [
-        (WebBrowserEngineType.PLAYWRIGHT,),
-        (WebBrowserEngineType.SELENIUM,),
+        WebBrowserEngineType.PLAYWRIGHT,
+        WebBrowserEngineType.SELENIUM,
     ],
     ids=["playwright", "selenium"],
 )
diff --git a/tests/metagpt/tools/test_web_browser_engine_playwright.py b/tests/metagpt/tools/test_web_browser_engine_playwright.py
index f8ea6ae0e..12ea96d7b 100644
--- a/tests/metagpt/tools/test_web_browser_engine_playwright.py
+++ b/tests/metagpt/tools/test_web_browser_engine_playwright.py
@@ -42,7 +42,8 @@ async def test_scrape_web_page(browser_type, use_proxy, kwagrs, proxy, capfd, ht
         assert len(results) == len(urls) + 1
         assert all(("MetaGPT" in i.inner_text) for i in results)
     if use_proxy:
-        await proxy_server.close()
+        proxy_server.close()
+        await proxy_server.wait_closed()
         assert "Proxy:" in capfd.readouterr().out
     await server.stop()
 
diff --git a/tests/metagpt/tools/test_web_browser_engine_selenium.py b/tests/metagpt/tools/test_web_browser_engine_selenium.py
index 7f0b8bd55..1b6a73678 100644
--- a/tests/metagpt/tools/test_web_browser_engine_selenium.py
+++ b/tests/metagpt/tools/test_web_browser_engine_selenium.py
@@ -43,13 +43,13 @@ async def test_scrape_web_page(browser_type, use_proxy, proxy, capfd, http_serve
     assert isinstance(result, WebPage)
     assert "MetaGPT" in result.inner_text
 
-    if urls:
-        results = await browser.run(url, *urls)
-        assert isinstance(results, list)
-        assert len(results) == len(urls) + 1
-        assert all(("MetaGPT" in i.inner_text) for i in results)
+    results = await browser.run(url, *urls)
+    assert isinstance(results, list)
+    assert len(results) == len(urls) + 1
+    assert all(("MetaGPT" in i.inner_text) for i in results)
     if use_proxy:
-        await proxy_server.close()
+        proxy_server.close()
+        await proxy_server.wait_closed()
         assert "Proxy:" in capfd.readouterr().out
     await server.stop()