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SpecFlow with Selenium: Tutorial to Run Your First Test on LambdaTest

In this topic, you will learn how to configure and run your C# automation testing scripts on LambdaTest Selenium cloud platform using C# framework SpecFlow.


By the end of this topic, you will be able to:

  1. Set up an environment for testing your hosted web pages using SpecFlow framework with Selenium.
  2. Understand and configure the core capabilities required for your Selenium test suite.
  3. Run test cases in parallel using SpecFlow with Selenium to reduce build times.
  4. Test your locally hosted pages on LambdaTest platform.
  5. Explore advanced features of LambdaTest.

Note: All the code samples in this documentation can be found in the LambdaTest's Repository on GitHub. You can either download or clone the repository to quickly run your tests.

Prerequisites For Running SpecFlow Selenium

Note: This tutorial is specifically for Windows users using Microsoft Visual Studio.

Before you can start performing SpecFlow automation testing with Selenium, you would need to:

  • Download and Install Selenium WebDriver from the official website.
  • Make sure you work with latest version of SpecFlow.
  • .Net framework to deliver guidelines while developing a range of application using C#.
  • Download Selenium WebDriver Language Binding for C# and extract them to appropriate folder. A .NET Core SDK of 2.1 or greater version.
  • You would also need LambdaTest tunnel binary file for testing your locally hosted or privately hosted projects.

Installing Selenium Dependencies and Tutorial Repo

Step 1: Clone the LambdaTest’s SpecFlow-Selenium-Sample repository and navigate to the code directory as shown below:

git clone
cd SpecFlow-Selenium-Sample

Setting up Your Authentication

Make sure you have your LambdaTest credentials with you to run test automation scripts with C# on LambdaTest Selenium Grid. You can obtain these credentials from the LambdaTest Automation Dashboard or through LambdaTest Profile.

Step 2: Set LambdaTest Username and Access Key in environment variables.


Run Your First Test

Configuration of Your Test Capabilites

Step 3: n the test script, you need to update your test capabilities. In this code, we are passing browser, browser version, and operating system information, along with LambdaTest Selenium grid capabilities via capabilities object. The capabilities object in the above code are defined as:

DesiredCapabilities capabilities = new DesiredCapabilities();
capabilities.SetCapability(CapabilityType.BrowserName, "Chrome");
capabilities.SetCapability(CapabilityType.Version, "96");
capabilities.SetCapability(CapabilityType.Platform, "Windows 10");

Note: You can generate capabilities for your test requirements with the help of our inbuilt Capabilities Generator tool.

Executing Your First Test

Step 4: Build the solution by clicking in Build > Build Solution.

Step 5: As shown below click on Test Explorer on your MS Visual Studio:


Step 6: Click on Run from the Test Explorer to run the sample test as shown below:


Your results would be displayed on the test console and on the LambdaTest dashboard. LambdaTest Dashboard will help you view all your text logs, screenshots and video recording for your entire Selenium tests.

Running Your Parallel Tests Using SpecFlow Testing Framework

Executing the Test

To run parallel tests, you may go to Test Explorer on Visual Studio as mentioned above and click on Run All tests to execute the tests. Your results would be displayed on the test console and on the LambdaTest dashboard. LambdaTest Dashboard will help you view all your text logs, screenshots and video recording for your entire Selenium tests.

Testing Locally Hosted Projects Using MSTest Selenium

You can test your locally hosted or privately hosted projects with LambdaTest Selenium grid cloud using LambdaTest Tunnel app. All you would have to do is set up an SSH tunnel using LambdaTest Tunnel app and pass toggle tunnel = True via desired capabilities. LambdaTest Tunnel establishes a secure SSH protocol based tunnel that allows you in testing your locally hosted or privately hosted pages, even before they are made live.

Refer our LambdaTest Tunnel documentation for more information.

Here’s how you can establish LambdaTest Tunnel.

Download the binary file of:

Open command prompt and navigate to the binary folder.

Run the following command:

LT -user {user’s login email} -key {user’s access key}

So if your user name is and key is 123456, the command would be:

LT -user -key 123456

Once you are able to connect LambdaTest Tunnel successfully, you would just have to pass on tunnel capabilities in the code shown below :

Tunnel Capability

DesiredCapabilities capabilities = new DesiredCapabilities();
capabilities.SetCapability("tunnel", true);