diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index ad1b0c5ac7..abf08d35d2 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -37,7 +37,7 @@ jobs:
     # XVFB-RUN merges both STDOUT and STDERR, whereas we need only STDERR
     # Wrap `npm run` in a subshell to redirect STDERR to file.
     # Enable core dumps in the subshell.
-    - run: xvfb-run --auto-servernum -- bash -c "ulimit -c unlimited && npm run coverage 2>./testrun.log"
+    - run: xvfb-run --auto-servernum -- bash -c "ulimit -c unlimited && npm run test 2>./testrun.log"
       env:
         BROWSER: ${{ matrix.browser }}
         DEBUG: "*,-pw:wrapped*"
diff --git a/src/common/utilityScriptSerializers.ts b/src/common/utilityScriptSerializers.ts
index aa6cbcdd10..8aba6ec70d 100644
--- a/src/common/utilityScriptSerializers.ts
+++ b/src/common/utilityScriptSerializers.ts
@@ -22,6 +22,10 @@ function isDate(obj: any): obj is Date {
   return obj instanceof Date || Object.prototype.toString.call(obj) === '[object Date]';
 }
 
+function isError(obj: any): obj is Error {
+  return obj instanceof Error || (obj && obj.__proto__ && obj.__proto__.name === 'Error');
+}
+
 export function parseEvaluationResultValue(value: any, handles: any[] = []): any {
   if (value === undefined)
     return undefined;
@@ -85,7 +89,7 @@ function serialize(value: any, jsHandleSerializer: (value: any) => { fallThrough
   if (isPrimitiveValue(value))
     return value;
 
-  if (value instanceof Error) {
+  if (isError(value)) {
     const error = value;
     if ('captureStackTrace' in global.Error) {
       // v8
diff --git a/src/helper.ts b/src/helper.ts
index 1bcb8a6011..13ea6741ac 100644
--- a/src/helper.ts
+++ b/src/helper.ts
@@ -132,6 +132,10 @@ class Helper {
     return obj instanceof RegExp || Object.prototype.toString.call(obj) === '[object RegExp]';
   }
 
+  static isError(obj: any): obj is Error {
+    return obj instanceof Error || (obj && obj.__proto__ && obj.__proto__.name === 'Error');
+  }
+
   static isObject(obj: any): obj is NonNullable<object> {
     return typeof obj === 'object' && obj !== null;
   }
diff --git a/src/page.ts b/src/page.ts
index 9b3645599d..aa476a76db 100644
--- a/src/page.ts
+++ b/src/page.ts
@@ -693,7 +693,7 @@ export class PageBinding {
       const result = await binding!.playwrightFunction({ frame: context.frame, page, context: page._browserContext }, ...args);
       context.evaluateInternal(deliverResult, { name, seq, result }).catch(logError(page._logger));
     } catch (error) {
-      if (error instanceof Error)
+      if (helper.isError(error))
         context.evaluateInternal(deliverError, { name, seq, message: error.message, stack: error.stack }).catch(logError(page._logger));
       else
         context.evaluateInternal(deliverErrorValue, { name, seq, error }).catch(logError(page._logger));
diff --git a/src/rpc/serializers.ts b/src/rpc/serializers.ts
index 8425f4ec67..eb74fa1bbf 100644
--- a/src/rpc/serializers.ts
+++ b/src/rpc/serializers.ts
@@ -24,7 +24,7 @@ import { helper, assert } from '../helper';
 
 
 export function serializeError(e: any): types.Error {
-  if (e instanceof Error)
+  if (helper.isError(e))
     return { message: e.message, stack: e.stack, name: e.name };
   return { value: e };
 }
diff --git a/test/__snapshots__/coverage.jest.js.snap b/test/__snapshots__/coverage.jest.js.snap
new file mode 100644
index 0000000000..5fd3ae9f8b
--- /dev/null
+++ b/test/__snapshots__/coverage.jest.js.snap
@@ -0,0 +1,20 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`CSSCoverage should work with complicated usecases 1`] = `
+"[
+  {
+    \\"url\\": \\"http://localhost:<PORT>/csscoverage/involved.html\\",
+    \\"ranges\\": [
+      {
+        \\"start\\": 149,
+        \\"end\\": 297
+      },
+      {
+        \\"start\\": 327,
+        \\"end\\": 433
+      }
+    ],
+    \\"text\\": \\"\\\\n@charset \\\\\\"utf-8\\\\\\";\\\\n@namespace svg url(http://www.w3.org/2000/svg);\\\\n@font-face {\\\\n  font-family: \\\\\\"Example Font\\\\\\";\\\\n  src: url(\\\\\\"./Dosis-Regular.ttf\\\\\\");\\\\n}\\\\n\\\\n#fluffy {\\\\n  border: 1px solid black;\\\\n  z-index: 1;\\\\n  /* -webkit-disabled-property: rgb(1, 2, 3) */\\\\n  -lol-cats: \\\\\\"dogs\\\\\\" /* non-existing property */\\\\n}\\\\n\\\\n@media (min-width: 1px) {\\\\n  span {\\\\n    -webkit-border-radius: 10px;\\\\n    font-family: \\\\\\"Example Font\\\\\\";\\\\n    animation: 1s identifier;\\\\n  }\\\\n}\\\\n\\"
+  }
+]"
+`;
diff --git a/test/accessibility.spec.js b/test/accessibility.jest.js
similarity index 99%
rename from test/accessibility.spec.js
rename to test/accessibility.jest.js
index 9556793a46..508a4250ff 100644
--- a/test/accessibility.spec.js
+++ b/test/accessibility.jest.js
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-const {FFOX, CHROMIUM, WEBKIT} = require('./utils').testOptions(browserType);
+const {FFOX, CHROMIUM, WEBKIT} = testOptions;
 
 describe('Accessibility', function() {
   it('should work', async function({page}) {
diff --git a/test/autowaiting.spec.js b/test/autowaiting.jest.js
similarity index 99%
rename from test/autowaiting.spec.js
rename to test/autowaiting.jest.js
index 827e7ee79d..5b27c4d6ad 100644
--- a/test/autowaiting.spec.js
+++ b/test/autowaiting.jest.js
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-const {FFOX, CHROMIUM, WEBKIT, USES_HOOKS} = require('./utils').testOptions(browserType);
+const {FFOX, CHROMIUM, WEBKIT, USES_HOOKS} = testOptions;
 
 describe('Auto waiting', () => {
   it('should await navigation when clicking anchor', async({page, server}) => {
diff --git a/test/click.spec.js b/test/click.jest.js
similarity index 99%
rename from test/click.spec.js
rename to test/click.jest.js
index 562213643b..c624023443 100644
--- a/test/click.spec.js
+++ b/test/click.jest.js
@@ -16,7 +16,7 @@
  */
 
 const utils = require('./utils');
-const {FFOX, CHROMIUM, WEBKIT, WIN, HEADLESS, USES_HOOKS} = utils.testOptions(browserType);
+const {FFOX, CHROMIUM, WEBKIT, HEADLESS, USES_HOOKS} = testOptions;
 
 async function giveItAChanceToClick(page) {
   for (let i = 0; i < 5; i++)
@@ -251,7 +251,7 @@ describe('Page.click', function() {
     await page.click('label[for="agree"]');
     expect(await page.evaluate(() => result.check)).toBe(false);
   });
-  it('should not hang with touch-enabled viewports', async({server, browser}) => {
+  it('should not hang with touch-enabled viewports', async({browser, playwright}) => {
     // @see https://github.com/GoogleChrome/puppeteer/issues/161
     const { viewport, hasTouch } = playwright.devices['iPhone 6'];
     const context = await browser.newContext({ viewport, hasTouch });
diff --git a/test/cookies.spec.js b/test/cookies.jest.js
similarity index 99%
rename from test/cookies.spec.js
rename to test/cookies.jest.js
index b898dbd709..aaa8e90aef 100644
--- a/test/cookies.spec.js
+++ b/test/cookies.jest.js
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-const {FFOX, CHROMIUM, WEBKIT, WIN} = require('./utils').testOptions(browserType);
+const {FFOX, CHROMIUM, WEBKIT, WIN} = testOptions;
 
 describe('BrowserContext.cookies', function() {
   it('should return no cookies in pristine browser context', async({context, page, server}) => {
diff --git a/test/coverage.spec.js b/test/coverage.jest.js
similarity index 98%
rename from test/coverage.spec.js
rename to test/coverage.jest.js
index bc1b1335d7..e4b51d74a2 100644
--- a/test/coverage.spec.js
+++ b/test/coverage.jest.js
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-const {FFOX, CHROMIUM, WEBKIT} = require('./utils').testOptions(browserType);
+const {FFOX, CHROMIUM, WEBKIT} = testOptions;
 
 describe.skip(CHROMIUM)('Page.coverage missing', function() {
   it('should work', async function({page, server}) {
@@ -141,11 +141,11 @@ describe.skip(!CHROMIUM)('CSSCoverage', function() {
       {start: 17, end: 38}
     ]);
   });
-  it('should work with complicated usecases', async function({page, server, golden}) {
+  it('should work with complicated usecases', async function({page, server}) {
     await page.coverage.startCSSCoverage();
     await page.goto(server.PREFIX + '/csscoverage/involved.html');
     const coverage = await page.coverage.stopCSSCoverage();
-    expect(JSON.stringify(coverage, null, 2).replace(/:\d{4}\//g, ':<PORT>/')).toBeGolden(golden('csscoverage-involved.txt'));
+    expect(JSON.stringify(coverage, null, 2).replace(/:\d{4}\//g, ':<PORT>/')).toMatchSnapshot();
   });
   it('should ignore injected stylesheets', async function({page, server}) {
     await page.coverage.startCSSCoverage();
diff --git a/test/evaluation.jest.js b/test/evaluation.jest.js
index 0ba74cc75f..f4787f50fb 100644
--- a/test/evaluation.jest.js
+++ b/test/evaluation.jest.js
@@ -17,6 +17,7 @@
 
 const utils = require('./utils');
 const path = require('path');
+const {FFOX, CHROMIUM, WEBKIT, USES_HOOKS, CHANNEL} = testOptions;
 
 describe('Page.evaluate', function() {
   it('should work', async({page, server}) => {
@@ -356,7 +357,7 @@ describe('Page.evaluate', function() {
     });
     expect(result).toEqual([42]);
   });
-  (WEBKIT ? it.skip : it)('should not throw an error when evaluation does a synchronous navigation and returns an object', async({page, server}) => {
+  it.fail(WEBKIT)('should not throw an error when evaluation does a synchronous navigation and returns an object', async({page, server}) => {
     // It is imporant to be on about:blank for sync reload.
     const result = await page.evaluate(() => {
       window.location.reload();
@@ -372,7 +373,7 @@ describe('Page.evaluate', function() {
     });
     expect(result).toBe(undefined);
   });
-  (CHANNEL ? it.skip : it)('should transfer 100Mb of data from page to node.js', async({page}) => {
+  it.skip(CHANNEL)('should transfer 100Mb of data from page to node.js', async({page}) => {
     const a = await page.evaluate(() => Array(100 * 1024 * 1024 + 1).join('a'));
     expect(a.length).toBe(100 * 1024 * 1024);
   });
@@ -388,7 +389,7 @@ describe('Page.evaluate', function() {
     const result = await page.evaluate(() => ({abc: 123}));
     expect(result).toEqual({abc: 123});
   });
-  (FFOX ? it.skip : it)('should await promise from popup', async ({page, server}) => {
+  it.fail(FFOX)('should await promise from popup', async ({page, server}) => {
     // Something is wrong about the way Firefox waits for the chained promise
     await page.goto(server.EMPTY_PAGE);
     const result = await page.evaluate(() => {
@@ -573,14 +574,14 @@ describe('Frame.evaluate', function() {
     else
       expect(pageImpl._delegate._contextIdToContext.size).toBe(count);
   }
-  (USES_HOOKS ? it.skip : it)('should dispose context on navigation', async({page, server, toImpl}) => {
+  it.skip(USES_HOOKS)('should dispose context on navigation', async({page, server, toImpl}) => {
     await page.goto(server.PREFIX + '/frames/one-frame.html');
     expect(page.frames().length).toBe(2);
     expectContexts(toImpl(page), 4);
     await page.goto(server.EMPTY_PAGE);
     expectContexts(toImpl(page), 2);
   });
-  (USES_HOOKS ? it.skip : it)('should dispose context on cross-origin navigation', async({page, server, toImpl}) => {
+  it.skip(USES_HOOKS)('should dispose context on cross-origin navigation', async({page, server, toImpl}) => {
     await page.goto(server.PREFIX + '/frames/one-frame.html');
     expect(page.frames().length).toBe(2);
     expectContexts(toImpl(page), 4);
diff --git a/test/jest/fixtures.js b/test/jest/fixtures.js
index fdc808cd13..1014e29598 100644
--- a/test/jest/fixtures.js
+++ b/test/jest/fixtures.js
@@ -27,7 +27,7 @@ const { setUseApiName } = require('../../lib/progress');
 
 module.exports = function registerFixtures(global) {
 
-  global.registerWorkerFixture('server', async ({}, test) => {
+  global.registerWorkerFixture('http_server', async ({}, test) => {
     const assetsPath = path.join(__dirname, '..', 'assets');
     const cachedPath = path.join(__dirname, '..', 'assets', 'cached');
 
@@ -40,14 +40,14 @@ module.exports = function registerFixtures(global) {
     server.EMPTY_PAGE = `http://localhost:${port}/empty.html`;
   
     const httpsPort = port + 1;
-    httpsServer = await TestServer.createHTTPS(assetsPath, httpsPort);
+    const httpsServer = await TestServer.createHTTPS(assetsPath, httpsPort);
     httpsServer.enableHTTPCache(cachedPath);
     httpsServer.PORT = httpsPort;
     httpsServer.PREFIX = `https://localhost:${httpsPort}`;
     httpsServer.CROSS_PROCESS_PREFIX = `https://127.0.0.1:${httpsPort}`;
     httpsServer.EMPTY_PAGE = `https://localhost:${httpsPort}/empty.html`;
   
-    await test(server);
+    await test({server, httpsServer});
 
     await Promise.all([
       server.stop(),
@@ -55,6 +55,14 @@ module.exports = function registerFixtures(global) {
     ]);  
   });
 
+  global.registerWorkerFixture('defaultBrowserOptions', async({}, test) => {
+    await test({
+      handleSIGINT: false,
+      slowMo: valueFromEnv('SLOW_MO', 0),
+      headless: !!valueFromEnv('HEADLESS', true),
+    });
+  });
+
   global.registerWorkerFixture('playwright', async({}, test) => {
     if (process.env.PWCHANNEL) {
       setUseApiName(false);
@@ -113,8 +121,8 @@ module.exports = function registerFixtures(global) {
     await test(playwright[process.env.BROWSER || 'chromium']);
   });
   
-  global.registerWorkerFixture('browser', async ({browserType}, test) => {
-    const browser = await browserType.launch({ headless: !!global.HEADLESS });
+  global.registerWorkerFixture('browser', async ({browserType, defaultBrowserOptions}, test) => {
+    const browser = await browserType.launch(defaultBrowserOptions);
     await test(browser);
     await browser.close();
   });
@@ -129,4 +137,20 @@ module.exports = function registerFixtures(global) {
     const page = await context.newPage();
     await test(page);
   });
+
+  global.registerFixture('server', async ({http_server}, test) => {
+    http_server.server.reset();
+    await test(http_server.server);
+  });
+
+  global.registerFixture('httpsServer', async ({http_server}, test) => {
+    http_server.httpsServer.reset();
+    await test(http_server.httpsServer);
+  });
+}
+
+function valueFromEnv(name, defaultValue) {
+  if (!(name in process.env))
+    return defaultValue;
+  return JSON.parse(process.env[name]);
 }
diff --git a/test/jest/playwrightEnvironment.js b/test/jest/playwrightEnvironment.js
index 889e2d8633..a0052be227 100644
--- a/test/jest/playwrightEnvironment.js
+++ b/test/jest/playwrightEnvironment.js
@@ -16,17 +16,25 @@
 
 const NodeEnvironment = require('jest-environment-node');
 const registerFixtures = require('./fixtures');
+const os = require('os');
+
+const platform = os.platform();
 
 class PlaywrightEnvironment extends NodeEnvironment {
   constructor(config, context) {
     super(config, context);
     this.fixturePool = new FixturePool();
-    this.global.CHROMIUM = process.env.BROWSER === 'chromium' || !process.env.BROWSER;
-    this.global.FFOX = process.env.BROWSER === 'firefox';
-    this.global.WEBKIT = process.env.BROWSER === 'webkit';
-    this.global.USES_HOOKS = process.env.PWCHANNEL === 'wire';
-    this.global.CHANNEL = !!process.env.PWCHANNEL;
-    this.global.HEADLESS = !!valueFromEnv('HEADLESS', true);
+    const testOptions = {};
+    testOptions.MAC = platform === 'darwin';
+    testOptions.LINUX = platform === 'linux';
+    testOptions.WIN = platform === 'win32';
+    testOptions.CHROMIUM = process.env.BROWSER === 'chromium' || !process.env.BROWSER;
+    testOptions.FFOX = process.env.BROWSER === 'firefox';
+    testOptions.WEBKIT = process.env.BROWSER === 'webkit';
+    testOptions.USES_HOOKS = process.env.PWCHANNEL === 'wire';
+    testOptions.CHANNEL = !!process.env.PWCHANNEL;
+    testOptions.HEADLESS = !!valueFromEnv('HEADLESS', true);
+    this.global.testOptions = testOptions;
 
     this.global.registerFixture = (name, fn) => {
       this.fixturePool.registerFixture(name, 'test', fn);
@@ -51,6 +59,24 @@ class PlaywrightEnvironment extends NodeEnvironment {
   }
 
   async handleTestEvent(event, state) {
+    if (event.name === 'setup') {
+      const describeSkip = this.global.describe.skip;
+      this.global.describe.skip = (...args) => {
+        if (args.length = 1)
+          return args[0] ? describeSkip : this.global.describe;
+        return describeSkip(...args);
+      };
+      this.global.describe.fail = this.global.describe.skip;
+
+      const itSkip = this.global.it.skip;
+      this.global.it.skip = (...args) => {
+        if (args.length = 1)
+          return args[0] ? itSkip : this.global.it;
+        return itSkip(...args);
+      };
+      this.global.it.fail = this.global.it.skip;
+      this.global.it.slow = () => this.global.it;
+    }
     if (event.name === 'test_start') {
       const fn = event.test.fn;
       event.test.fn = async () => {
@@ -161,7 +187,7 @@ exports.default = exports.getPlaywrightEnv();
 
 function fixtureParameterNames(fn) {
   const text = fn.toString();
-  const match = text.match(/async\s*\(\s*{\s*([^}]*)\s*}/);
+  const match = text.match(/async(?:\s+function)?\s*\(\s*{\s*([^}]*)\s*}/);
   if (!match || !match[1].trim())
     return [];
   let signature = match[1];
diff --git a/test/network.spec.js b/test/network.jest.js
similarity index 99%
rename from test/network.spec.js
rename to test/network.jest.js
index f726647b65..9adc548c83 100644
--- a/test/network.spec.js
+++ b/test/network.jest.js
@@ -18,7 +18,7 @@
 const fs = require('fs');
 const path = require('path');
 const utils = require('./utils');
-const {FFOX, CHROMIUM, WEBKIT, MAC, WIN} = utils.testOptions(browserType);
+const {FFOX, CHROMIUM, WEBKIT, MAC, WIN} = testOptions;
 
 describe('Page.Events.Request', function() {
   it('should fire for navigation requests', async({page, server}) => {
diff --git a/test/page.spec.js b/test/page.jest.js
similarity index 99%
rename from test/page.spec.js
rename to test/page.jest.js
index 58187085f1..a94ee48cea 100644
--- a/test/page.spec.js
+++ b/test/page.jest.js
@@ -18,7 +18,7 @@
 const path = require('path');
 const util = require('util');
 const vm = require('vm');
-const {FFOX, CHROMIUM, WEBKIT, WIN, USES_HOOKS, CHANNEL} = require('./utils').testOptions(browserType);
+const {FFOX, CHROMIUM, WEBKIT, WIN, USES_HOOKS, CHANNEL} = testOptions;
 
 describe('Page.close', function() {
   it('should reject all promises when page is closed', async({context}) => {
@@ -113,7 +113,7 @@ describe('Async stacks', () => {
   });
 });
 
-describe.fail(FFOX && WIN).skip(USES_HOOKS)('Page.Events.Crash', function() {
+describe.fail(FFOX && WIN || USES_HOOKS)('Page.Events.Crash', function() {
   // Firefox Win: it just doesn't crash sometimes.
 
   function crash(pageImpl) {
@@ -329,12 +329,12 @@ describe('Page.waitForRequest', function() {
     ]);
     expect(request.url()).toBe(server.PREFIX + '/digits/2.png');
   });
-  it('should respect timeout', async({page, server}) => {
+  it('should respect timeout', async({page, playwright}) => {
     let error = null;
     await page.waitForEvent('request', { predicate: () => false, timeout: 1 }).catch(e => error = e);
     expect(error).toBeInstanceOf(playwright.errors.TimeoutError);
   });
-  it('should respect default timeout', async({page, server}) => {
+  it('should respect default timeout', async({page, playwright}) => {
     let error = null;
     page.setDefaultTimeout(1);
     await page.waitForEvent('request', () => false).catch(e => error = e);
@@ -400,12 +400,12 @@ describe('Page.waitForResponse', function() {
     ]);
     expect(response.url()).toBe(server.PREFIX + '/digits/2.png');
   });
-  it('should respect timeout', async({page, server}) => {
+  it('should respect timeout', async({page, playwright}) => {
     let error = null;
     await page.waitForEvent('response', { predicate: () => false, timeout: 1 }).catch(e => error = e);
     expect(error).toBeInstanceOf(playwright.errors.TimeoutError);
   });
-  it('should respect default timeout', async({page, server}) => {
+  it('should respect default timeout', async({page, playwright}) => {
     let error = null;
     page.setDefaultTimeout(1);
     await page.waitForEvent('response', () => false).catch(e => error = e);
@@ -663,7 +663,7 @@ describe('Page.setContent', function() {
     const result = await page.content();
     expect(result).toBe(`${doctype}${expectedOutput}`);
   });
-  it('should respect timeout', async({page, server}) => {
+  it('should respect timeout', async({page, server, playwright}) => {
     const imgPath = '/img.png';
     // stall for image
     server.setRoute(imgPath, (req, res) => {});
@@ -671,7 +671,7 @@ describe('Page.setContent', function() {
     await page.setContent(`<img src="${server.PREFIX + imgPath}"></img>`, {timeout: 1}).catch(e => error = e);
     expect(error).toBeInstanceOf(playwright.errors.TimeoutError);
   });
-  it('should respect default navigation timeout', async({page, server}) => {
+  it('should respect default navigation timeout', async({page, server, playwright}) => {
     page.setDefaultNavigationTimeout(1);
     const imgPath = '/img.png';
     // stall for image
diff --git a/test/test.config.js b/test/test.config.js
index 73bcee3c25..d7a860b82f 100644
--- a/test/test.config.js
+++ b/test/test.config.js
@@ -71,11 +71,6 @@ module.exports = {
   specs: [
     {
       files: [
-        './accessibility.spec.js',
-        './autowaiting.spec.js',
-        './click.spec.js',
-        './cookies.spec.js',
-        './coverage.spec.js',
         './dialog.spec.js',
         './dispatchevent.spec.js',
         './download.spec.js',
@@ -88,8 +83,6 @@ module.exports = {
         './keyboard.spec.ts',
         './mouse.spec.js',
         './navigation.spec.js',
-        './network.spec.js',
-        './page.spec.js',
         './pdf.spec.js',
         './queryselector.spec.js',
         './screenshot.spec.js',