Zalenium Docker with LambdaTest

I am trying to setup LambdaTest in the Zalenium Docker. I have followed the steps mentioned in Zalenium - A flexible and scalable Selenium Grid. to setup the Zalenium docker and it was installed successfully.

However, when I try to use LambdaTest with Zalenium docker, I get 401 unauthorized error. I am running all the commands mentioned below as an administrator

These are steps that I have followed so far:

  1. Pull the docker image of the Lambda Tunnel by running the command (Source -

docker pull lambdatest/tunnel:latest

  1. Set the required environment variables mentioned in the LambdaTest Zalenium setup page:

set LT_USERNAME= “” set LT_ACCESS_KEY=“access.key” set LT_URL=“

I am using the port number as 9002.

  1. Followed the steps mentioned on the Zalenium site (for using the Zalenium Docker with LambdaTest):

Same steps are also mentioned here.

Once I run the command, I get the error as shown below:

Looks like the authorization is not going through. Can the LamdaTest team help me figure this out since it is blocking the usage of the Zalenium docker.

Thanks in advance.


Thanks, Himanshu for bringing this to our notice. We are looking into it at our end. :slightly_smiling_face:


Hello Himanshu

Could you please define your LT_ACCESS_KEY and LT_USERNAME in your environment variables like this

and then connecting through this command:

docker run --rm -ti --name zalenium -p 4444:4444 -e LT_USERNAME -e LT_ACCESS_KEY -e -v /tmp/videos:/home/seluser/videos -v /var/run/docker.sock:/var/run/docker.sock --privileged dosel/zalenium start --lambdaTestEnabled true


Thanks for the reply, it worked after I set the required details via Cygwin

export LT_USERNAME=user-name export LT_ACCESS_KEY=access-key export LT_URL=

Once these are set, I run the following command:

docker run --rm -ti --name zalenium -p 4447:4444 -e LT_USERNAME -e LT_ACCESS_KEY -e LT_URL -v /c/Test_Videos:/home/seluser/videos -v /var/run/docker.sock:/var/run/docker.sock --privileged dosel/zalenium start --lambdaTestEnabled true

where recorded test video is available in C:\Test_Videos

Assuming that I am server is running at port 4447 and I want to use the LambdaTest capabilities (e.g. Safari 13.0 on MacOS Catalina), is it possible to do it with the Docker? If so, please share the code snippet.

I am currently using LambdaTest with Docker in the following manner:

public void setupLTCombination (String build, String name, String platformName,
                                    String browserName, String browserVersion) throws MalformedURLException
        DesiredCapabilities capabilities = new DesiredCapabilities();

        capabilities.setCapability("build", build);
        capabilities.setCapability("name", name);
        capabilities.setCapability("platformName", platformName);
        capabilities.setCapability("browserName", browserName);
        String[] customTags = {""};
        customTags[0] = platformName + " " + browserName + " " + browserVersion;
        /* Setting Custom Tags */
        capabilities.setCapability("tags", customTags);
        /* End - Setting Custom Tags */

        //This will not be hardcoded to Chrome for Safari (and other browsers), it is only for reference
         ChromeOptions options = new ChromeOptions();
        //driver.set(new RemoteWebDriver(new URL("http://" + username + ":" + access_key + ""), capabilities));
        driver.set(new RemoteWebDriver(new URL(remote_url), options));

where remote_url is set to “http://localhost:4447/wd/hub” I have installed the Selenium Hub and Firefox & Chrome nodes in the Hub but I wanted to check if I can run the test in Docker for other browser & OS combinations (using LambdaTest).

Here is what I see in the Grid Console

As expected, tests work fine with Firefox and Chrome (using Desired Capabilities or Options) but how I can use LambdaTest and Docker for other browser and OS combinations?


Himanshu, seems to be you can do that by changing browser and platform in desired capabilities

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Hi LambdaTest Team, Is there any update on this front?

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I am sharing a sample. Please try defining the URL like this

URL url= new URL("http://localhost:4444/wd/hub");

driver = new RemoteWebDriver(url,capabilities);

Please let me know if this works for you.



Hello Himanshu,

Could you please try using this to code to run zalenium rather than using LT_URL

docker run --rm -ti --name zalenium -p 4444:4444 -e LT_USERNAME -e LT_ACCESS_KEY -e -v /tmp/videos:/home/seluser/videos -v /var/run/docker.sock:/var/run/docker.sock --privileged dosel/zalenium start --lambdaTestEnabled true


@sakshama Bit late in replying, I could finally come up with a detailed blog on How to run Selenium Tests in Docker where I added a separate section on leveraging cloud-based Selenium Grid and Docker to expedite the automation testing process.

Thanks for your support.

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