--- title: 'Advanced WebDriver Testing: Intercepting and Mocking Network' description: We've added various new/custom WebDriver commands to our Chrome Browsers. source_url: html: https://testingbot.com/blog/webdriver-network-testing md: https://testingbot.com/blog/webdriver-network-testing.md --- # Mocking with WebDriver By [Jochen D.](https://testingbot.com/about/jochen-d)2019-03-04 Share on Facebook Share on Twitter Post on Reddit Share link We've added various new/custom WebDriver commands to our Chrome Browsers. - Throttle the network speed - Fetch Network requests during your WebDriver tests - Intercept and mock network responses during your tests #### Throttle Network Speed With this new option, you can simulate different network speeds during your test. Simulate a 4G connection, specify a GPRS speed or even test how your page reacts when there's no internet connection (offline mode). You can change these settings during your test, so it makes it very easily to test real life situations. For example; people using their cell-phone suddenly experience a slower connection. #### Fetch Network Requests You can now fetch all network requests and responses during your test. As [WebDriver does not support reading status codes](https://github.com/seleniumhq/selenium-google-code-issue-archive/issues/141), it is now possible to use this command to fetch the status code, response headers and request headers. #### Intercept and Mock With this functionality, you can intercept and change responses during your test: - When a test visits a page, you can configure the browser to redirect to another page. - Configure specific URLs to immediately return an error during your test. Useful to disable ads/trackers during your tests - Change the entire response (body + headers) of any URL during your test. Documentation for this new feature is available on our [Debugging support](https://testingbot.com/support/web-automate/selenium/network) page. [← Previous post Frontend Performance Testing](https://testingbot.com/blog/frontend-performance-testing) [Next post → Launching Real Mobile Device Testing](https://testingbot.com/blog/real-mobile-device-testing) ## Sidebar ### TestingBot Cloud Testing Run automated, manual and visual tests on remote browsers and devices. Sign up for a free trial. [Free Trial](https://testingbot.com/users/sign_up) ### Latest articles [![Announcing AI Test Insights](https://testingbot.com/assets/blog/2026/ai-insights.jpg)](https://testingbot.com/blog/ai-test-insights) #### Announcing AI Test Insights Use AI Insights to quickly discover why an automated test... 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[See all posts by Jochen D. →](https://testingbot.com/about/jochen-d) ## Ready to start testing? [Start a free trial](https://testingbot.com/users/sign_up)