Selenium 16: How to Run Parallel Tests Using Selenium Grid and TestNG

Hi all, in previous article I explained and showed two common techniques to run your selenium tests in parallel with Selenium Grid and JUnit. In this post, I will show you to run your tests in parallel with another popular testing framework, TestNG.

Test Scenario:

We have two test classes. First one opens and get title of the page and check that it is equal to “Yahoo”. The second test opens and check that title is “Google”. Tests are very simple but our aim is to run them in parallel with different browsers. We will run first test with Chrome and the second one with Firefox. We will configure this within TestNG.xml file.

Making Your TestNG Tests Thread-Safe:

It is very important to construct our tests thread-safe in order to run them in parallel without problem. We have to make sure that shared resources are isolated within each thread. Thus, we need to initialize all related resources within test method. Also, we need to keep test specific resources thread local and keep your static class members as static that are really need to be static. Apply these to all the classes that are loading during the test execution.

Test Architecture:

I used three JAVA files for our test. These are, and Also, I did the configurations in TestNG.xml file., I created ThreadLocal <>() webdriver for thread-safe test execution and I got TestNG parameters (browser, platform) with @Parameter annotation. In setupTest method I created and configured Desired Capabilities and set our local grid address. getDriver() method returns the created driver. FirstTest and SecondTest classes extends TestBase class and comprise of their test code.

Test Code:

Before run the test, you need to trigger Selenium Grid!
It is described at first section of this article.



Test Results:




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About the Author:

Onur Baskirt
Onur Baskirt is a senior IT professional with 10+ years of experience. He worked at Bahçesehir University, ST Microelectronics, Huawei and Ericsson as research assistant, design verification engineer and software test leader. Also, he worked as software test leader and software operations manager at Turkey's biggest technology retailer, Teknosa. Now, he is working as Head of Software Testing and Manager of two Development Teams at His current research areas are technical software testing, programming, and computer science. Formerly, he has several research works and papers on digital chip design & verification. His hobbies are sport, dancing, traveling, and nutrition. You can find detailed information about him on his linked-in page.


  1. Rahul Rana October 10, 2017 at 7:55 am - Reply

    How do you implement parallel testing with page factory. I tried this with page factory and its throwing thread safety issues.
    Can you write a post for parallel testing when page factory is used

    • Onur Baskirt
      Onur Baskirt October 10, 2017 at 11:29 am - Reply

      What kind of errors you faced with? Would you share your error messages or details of your problems?

  2. pooja October 10, 2017 at 8:02 pm - Reply

    hi Sir,

    Dont we have to set system.set property in base class?from where does it take browser exe files?

    • Onur Baskirt
      Onur Baskirt October 11, 2017 at 12:15 am - Reply

      Hi Pooja, You don’t need to do it. Open a directory on C:\ driver as “drivers”. Download and put chrome and firefox driver executables in that folder. After that, open environmental variables on windows. Add “C:\drivers” location into path variable. Then restart the PC. After that, you do not need to declare line for driver executables in your automation codes.

      For parallel tests, you need to do it in grid configuration also. You can find details in this article.

  3. Rahul Rana October 17, 2017 at 12:14 pm - Reply

    use above project. will make life much easier

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