diff --git a/docs/api.md b/docs/api.md
index 4816ad5640..03673c956b 100644
--- a/docs/api.md
+++ b/docs/api.md
@@ -129,7 +129,6 @@
   * [event: 'requestfailed'](#event-requestfailed)
   * [event: 'requestfinished'](#event-requestfinished)
   * [event: 'response'](#event-response)
-  * [event: 'websocket'](#event-websocket)
   * [event: 'workercreated'](#event-workercreated)
   * [event: 'workerdestroyed'](#event-workerdestroyed)
   * [page.$(selector)](#pageselector)
@@ -215,17 +214,6 @@
   * [response.statusText()](#responsestatustext)
   * [response.text()](#responsetext)
   * [response.url()](#responseurl)
-- [class: WebSocket](#class-websocket)
-  * [event: 'close'](#event-close-1)
-  * [event: 'error'](#event-error)
-  * [event: 'messageReceived'](#event-messagereceived)
-  * [event: 'messageSent'](#event-messagesent)
-  * [event: 'open'](#event-open)
-  * [webSocket.requestHeaders()](#websocketrequestheaders)
-  * [webSocket.responseHeaders()](#websocketresponseheaders)
-  * [webSocket.status()](#websocketstatus)
-  * [webSocket.statusText()](#websocketstatustext)
-  * [webSocket.url()](#websocketurl)
 - [class: TimeoutError](#class-timeouterror)
 - [class: Accessibility](#class-accessibility)
   * [accessibility.snapshot([options])](#accessibilitysnapshotoptions)
@@ -1836,11 +1824,6 @@ Emitted when a request finishes successfully.
 
 Emitted when a [response] is received.
 
-#### event: 'websocket'
-- <[WebSocket]>
-
-Emitted when a WebSocket request is made.
-
 #### event: 'workercreated'
 - <[Worker]>
 
@@ -3020,54 +3003,6 @@ Contains the status text of the response (e.g. usually an "OK" for a success).
 
 Contains the URL of the response.
 
-### class: WebSocket
-
-[WebSocket] class represents web sockets that are created by page.
-
-#### event: 'close'
-
-Emitted when web socket closes.
-
-#### event: 'error'
-<[string]>
-
-Emitted on error while establishing the connection, sending or receiving the web socket frame.
-
-#### event: 'messageReceived'
-- <[string]|[Buffer]>
-
-Emitted when web socket receives data.
-
-#### event: 'messageSent'
-- <[string]|[Buffer]>
-
-Emitted when web socket sends data.
-
-#### event: 'open'
-
-Emitted when web socket opens.
-
-#### webSocket.requestHeaders()
-- returns: <[Object]> An object with HTTP headers associated with the WebSocket upgrade request. All header names are lower-case.
-
-#### webSocket.responseHeaders()
-- returns: <[Object]> An object with HTTP headers associated with the WebSocket upgrade response. All header names are lower-case.
-
-#### webSocket.status()
-- returns: <[number]>
-
-Contains the status code of the web socket (e.g., 101 for a successful upgrade).
-
-#### webSocket.statusText()
-- returns: <[string]>
-
-Contains the status text of the web socket response (e.g. usually "Switching Protocols" for a successful upgrade).
-
-#### webSocket.url()
-- returns: <[string]>
-
-Contains the URL of the web socket.
-
 ### class: TimeoutError
 
 * extends: [Error]
diff --git a/src/api.ts b/src/api.ts
index eb48396eb6..85ef672edd 100644
--- a/src/api.ts
+++ b/src/api.ts
@@ -24,7 +24,7 @@ export { TimeoutError } from './errors';
 export { Frame } from './frames';
 export { Keyboard, Mouse } from './input';
 export { JSHandle } from './javascript';
-export { Request, Response, WebSocket } from './network';
+export { Request, Response } from './network';
 export { Coverage, FileChooser, Page, Worker } from './page';
 
 export { CRBrowser as ChromiumBrowser } from './chromium/crBrowser';
diff --git a/test/mouse.spec.js b/test/mouse.spec.js
index adc0542613..6ddee3e807 100644
--- a/test/mouse.spec.js
+++ b/test/mouse.spec.js
@@ -56,22 +56,7 @@ module.exports.describe = function({testRunner, expect, FFOX, CHROMIUM, WEBKIT,
       expect(event.isTrusted).toBe(true);
       expect(event.button).toBe(0);
     });
-    it('should resize the textarea', async({page, server}) => {
-      await page.goto(server.PREFIX + '/input/textarea.html');
-      const {x, y, width, height} = await page.evaluate(dimensions);
-      const mouse = page.mouse;
-      // The test becomes flaky on WebKit without next line.
-      if (WEBKIT)
-        await page.evaluate(() => new Promise(requestAnimationFrame));
-      await mouse.move(x + width - 4, y + height - 4);
-      await mouse.down();
-      await mouse.move(x + width + 100, y + height + 100);
-      await mouse.up();
-      const newDimensions = await page.evaluate(dimensions);
-      expect(newDimensions.width).toBe(Math.round(width + 104));
-      expect(newDimensions.height).toBe(Math.round(height + 104));
-    });
-    it('should select the text with mouse', async({page, server}) => {
+    it.skip(WEBKIT)('should select the text with mouse', async({page, server}) => {
       await page.goto(server.PREFIX + '/input/textarea.html');
       await page.focus('textarea');
       const text = 'This is the text that we are going to try to select. Let\'s see how it goes.';
diff --git a/test/network.spec.js b/test/network.spec.js
index 5151b58418..263c59c0fa 100644
--- a/test/network.spec.js
+++ b/test/network.spec.js
@@ -344,7 +344,7 @@ module.exports.describe = function({testRunner, expect, FFOX, CHROMIUM, WEBKIT})
     });
   });
 
-  describe.skip(FFOX)('WebSocket', function() {
+  false && describe.skip(FFOX)('WebSocket', function() {
     it('should work', async({page, server}) => {
       const value = await page.evaluate((port) => {
         let cb;
diff --git a/test/page.spec.js b/test/page.spec.js
index a8cf9e0786..d599d40078 100644
--- a/test/page.spec.js
+++ b/test/page.spec.js
@@ -172,7 +172,7 @@ module.exports.describe = function({testRunner, expect, headless, playwright, FF
       expect(await page.evaluate(() => !!window.opener)).toBe(false);
       expect(await popup.evaluate(() => !!window.opener)).toBe(false);
     });
-    it.skip(FFOX)('should not treat navigations as new popups', async({page, server}) => {
+    it.skip(WEBKIT || FFOX)('should not treat navigations as new popups', async({page, server}) => {
       await page.goto(server.EMPTY_PAGE);
       await page.setContent('<a target=_blank rel=noopener href="/one-style.html">yo</a>');
       const [popup] = await Promise.all([
diff --git a/test/workers.spec.js b/test/workers.spec.js
index 2126b85a80..b810a136c6 100644
--- a/test/workers.spec.js
+++ b/test/workers.spec.js
@@ -113,7 +113,7 @@ module.exports.describe = function({testRunner, expect, FFOX, CHROMIUM, WEBKIT})
       expect(response.request()).toBe(request);
       expect(response.ok()).toBe(true);
     });
-    it.skip(FFOX)('should report web socket activity', async function({page, server}) {
+    false && it.skip(FFOX)('should report web socket activity', async function({page, server}) {
       const [worker] = await Promise.all([
         page.waitForEvent('workercreated'),
         page.goto(server.PREFIX + '/worker/worker.html'),