diff --git a/src/webkit/wkExecutionContext.ts b/src/webkit/wkExecutionContext.ts
index 1e843cb842..547e22e6bd 100644
--- a/src/webkit/wkExecutionContext.ts
+++ b/src/webkit/wkExecutionContext.ts
@@ -219,9 +219,9 @@ export class WKExecutionContext implements js.ExecutionContextDelegate {
   }
 
   private _returnObjectByValue(objectId: Protocol.Runtime.RemoteObjectId) {
-    const serializeFunction = function(stringify: (o: any) => string) {
+    const serializeFunction = function() {
       try {
-        return stringify(this);
+        return JSON.stringify(this);
       } catch (e) {
         if (e instanceof TypeError)
           return void 0;
@@ -232,7 +232,6 @@ export class WKExecutionContext implements js.ExecutionContextDelegate {
       // Serialize object using standard JSON implementation to correctly pass 'undefined'.
       functionDeclaration: serializeFunction + '\n' + suffix + '\n',
       objectId: objectId,
-      arguments: [ { objectId: this._jsonStringifyObjectId } ],
       returnByValue: true
     }).catch(e => {
       if (isSwappedOutError(e))
diff --git a/src/webkit/wkPage.ts b/src/webkit/wkPage.ts
index adb737d74b..a413697190 100644
--- a/src/webkit/wkPage.ts
+++ b/src/webkit/wkPage.ts
@@ -37,8 +37,6 @@ import { getAccessibilityTree } from './wkAccessibility';
 
 const UTILITY_WORLD_NAME = '__playwright_utility_world__';
 const BINDING_CALL_MESSAGE = '__playwright_binding_call__';
-const JSON_CALL_MESSAGE = '__playwright_json_call__';
-const JSON_SAVE_SCRIPT = `console.debug('${JSON_CALL_MESSAGE}', JSON.stringify.bind(JSON))`;
 
 export class WKPage implements PageDelegate {
   readonly rawMouse: RawMouseImpl;
@@ -50,7 +48,7 @@ export class WKPage implements PageDelegate {
   private readonly _contextIdToContext: Map<number, dom.FrameExecutionContext>;
   private _isolatedWorlds: Set<string>;
   private _sessionListeners: RegisteredListener[] = [];
-  private readonly _bootstrapScripts: string[] = [ JSON_SAVE_SCRIPT ];
+  private readonly _bootstrapScripts: string[] = [];
 
   constructor(browser: WKBrowser, browserContext: BrowserContext) {
     this._browser = browser;
@@ -111,7 +109,6 @@ export class WKPage implements PageDelegate {
     if (this._page._state.viewport)
       promises.push(WKPage._setViewport(session, this._page._state.viewport));
     await Promise.all(promises);
-    await this._page.evaluate(JSON_SAVE_SCRIPT);
   }
 
   didClose(crashed: boolean) {
@@ -224,12 +221,6 @@ export class WKPage implements PageDelegate {
       this._page._onBindingCalled(parameters[2].value, context);
       return;
     }
-    if (level === 'debug' && parameters && parameters[0].value === JSON_CALL_MESSAGE) {
-      const parsedObjectId = JSON.parse(parameters[1].objectId);
-      const context = this._contextIdToContext.get(parsedObjectId.injectedScriptId);
-      (context._delegate as WKExecutionContext)._jsonStringifyObjectId = parameters[1].objectId;
-      return;
-    }
     if (level === 'error' && source === 'javascript') {
       const error = new Error(text);
       error.stack = '';
diff --git a/test/evaluation.spec.js b/test/evaluation.spec.js
index 7fd2730575..6cf803f756 100644
--- a/test/evaluation.spec.js
+++ b/test/evaluation.spec.js
@@ -259,7 +259,7 @@ module.exports.describe = function({testRunner, expect, FFOX, CHROME, WEBKIT}) {
       })).catch(e => error = e);
       expect(error.message).toContain('Error in promise');
     });
-    it('should work even when JSON is set to null', async ({ page }) => {
+    it.skip(WEBKIT)('should work even when JSON is set to null', async ({ page }) => {
       await page.evaluate(() => { window.JSON.stringify = null; window.JSON = null; });
       const result = await page.evaluate(() => ({abc: 123}));
       expect(result).toEqual({abc: 123});