diff --git a/tests/config/proxy.ts b/tests/config/proxy.ts
index f9672cfb1b..782dfc7814 100644
--- a/tests/config/proxy.ts
+++ b/tests/config/proxy.ts
@@ -114,7 +114,7 @@ export async function setupSocksForwardingServer({
   const socksProxy = new SocksProxy();
   socksProxy.setPattern('*');
   socksProxy.addListener(SocksProxy.Events.SocksRequested, async (payload: SocksSocketRequestedPayload) => {
-    if (!['127.0.0.1', 'fake-localhost-127-0-0-1.nip.io', 'localhost'].includes(payload.host) || payload.port !== allowedTargetPort) {
+    if (!['127.0.0.1', '0:0:0:0:0:0:0:1', 'fake-localhost-127-0-0-1.nip.io', 'localhost'].includes(payload.host) || payload.port !== allowedTargetPort) {
       socksProxy.sendSocketError({ uid: payload.uid, error: 'ECONNREFUSED' });
       return;
     }
diff --git a/tests/config/serverFixtures.ts b/tests/config/serverFixtures.ts
index a156f2ac5f..2bff8e6369 100644
--- a/tests/config/serverFixtures.ts
+++ b/tests/config/serverFixtures.ts
@@ -51,7 +51,7 @@ export const serverFixtures: Fixtures<ServerFixtures, ServerWorkerOptions> = {
 
     const socksServer = new MockSocksServer();
     const socksPort = port + 2;
-    await socksServer.listen(socksPort, 'localhost');
+    await socksServer.listen(socksPort, loopback);
 
     const proxyPort = port + 3;
     const proxyServer = await TestProxy.create(proxyPort);
diff --git a/tests/library/client-certificates.spec.ts b/tests/library/client-certificates.spec.ts
index 10c8a52235..8e0a4cdf47 100644
--- a/tests/library/client-certificates.spec.ts
+++ b/tests/library/client-certificates.spec.ts
@@ -390,7 +390,7 @@ test.describe('browser', () => {
     });
     expect(connectHosts).toEqual([]);
     await page.goto(serverURL);
-    const host = browserName === 'webkit' && isMac ? 'localhost' : '127.0.0.1';
+    const host = browserName === 'webkit' && isMac ? '0:0:0:0:0:0:0:1' : '127.0.0.1';
     expect(connectHosts).toEqual([`${host}:${serverPort}`]);
     await expect(page.getByTestId('message')).toHaveText('Hello Alice, your certificate was issued by localhost!');
     await page.close();
diff --git a/tests/library/har.spec.ts b/tests/library/har.spec.ts
index 3a10347825..a5d4a6fa0e 100644
--- a/tests/library/har.spec.ts
+++ b/tests/library/har.spec.ts
@@ -862,7 +862,7 @@ it('should include timings when using http proxy', async ({ contextFactory, serv
   proxyServer.forwardTo(server.PORT, { allowConnectRequests: true });
   const { page, getLog } = await pageWithHar(contextFactory, testInfo, { proxy: { server: `localhost:${proxyServer.PORT}` } });
   const response = await page.request.get(server.EMPTY_PAGE);
-  await response.body();
+  expect(proxyServer.connectHosts).toEqual([`localhost:${server.PORT}`]);
   await expect(response).toBeOK();
   const log = await getLog();
   expect(log.entries[0].timings.connect).toBeGreaterThan(0);
@@ -871,7 +871,7 @@ it('should include timings when using http proxy', async ({ contextFactory, serv
 it('should include timings when using socks proxy', async ({ contextFactory, server, socksPort }, testInfo) => {
   const { page, getLog } = await pageWithHar(contextFactory, testInfo, { proxy: { server: `socks5://localhost:${socksPort}` } });
   const response = await page.request.get(server.EMPTY_PAGE);
-  await response.body();
+  expect(await response.text()).toContain('Served by the SOCKS proxy');
   await expect(response).toBeOK();
   const log = await getLog();
   expect(log.entries[0].timings.connect).toBeGreaterThan(0);