diff --git a/src/server/webkit/wkInterceptableRequest.ts b/src/server/webkit/wkInterceptableRequest.ts
index 7283714be7..8aff250bb2 100644
--- a/src/server/webkit/wkInterceptableRequest.ts
+++ b/src/server/webkit/wkInterceptableRequest.ts
@@ -89,7 +89,7 @@ export class WKInterceptableRequest {
       requestStart: timingPayload ? wkMillisToRoundishMillis(timingPayload.requestStart) : -1,
       responseStart: timingPayload ? wkMillisToRoundishMillis(timingPayload.responseStart) : -1,
     };
-    const setCookieSeparator = process.platform === 'linux' ? '\n' : ',';
+    const setCookieSeparator = process.platform === 'darwin' ? ',' : '\n';
     return new network.Response(this.request, responsePayload.status, responsePayload.statusText, headersObjectToArray(responsePayload.headers, ',', setCookieSeparator), timing, getResponseBody);
   }
 }
diff --git a/tests/page/page-network-request.spec.ts b/tests/page/page-network-request.spec.ts
index 4d32fd0f15..902cf559f0 100644
--- a/tests/page/page-network-request.spec.ts
+++ b/tests/page/page-network-request.spec.ts
@@ -271,9 +271,12 @@ it('should report all headers', async ({ page, server, browserName, platform })
   server.setRoute('/headers', (req, res) => {
     for (let i = 0; i < req.rawHeaders.length; i += 2)
       expectedHeaders[req.rawHeaders[i].toLowerCase()] = req.rawHeaders[i + 1];
+    if (browserName === 'webkit' && platform === 'win32') {
+      delete expectedHeaders['accept-encoding'];
+      delete expectedHeaders['accept-language'];
+    }
     res.end();
   });
-
   await page.goto(server.EMPTY_PAGE);
   const [request] = await Promise.all([
     page.waitForRequest('**/*'),
diff --git a/tests/page/page-network-response.spec.ts b/tests/page/page-network-response.spec.ts
index 34fd0f96c4..5e7b5f0cad 100644
--- a/tests/page/page-network-response.spec.ts
+++ b/tests/page/page-network-response.spec.ts
@@ -118,7 +118,8 @@ it('should return status text', async ({page, server}) => {
   expect(response.statusText()).toBe('cool!');
 });
 
-it('should report all headers', async ({ page, server }) => {
+it('should report all headers', async ({ page, server, browserName, platform }) => {
+  it.fixme(browserName === 'webkit' && platform === 'win32', 'libcurl does not support non-set-cookie multivalue headers');
   const expectedHeaders = {
     'header-a': ['value-a', 'value-a-1', 'value-a-2'],
     'header-b': ['value-b'],