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Python Unittest with Selenium : Tutorial to run your first test on Lambdatest

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


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

  1. Set up an environment for testing your hosted web pages using UnitTest framework with Selenium.
  2. Understand and configure the core capabilities required for your Selenium test suite.
  3. Test your locally hosted pages on LambdaTest platform.
  4. 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 To Perform Unit testing In Python with Selenium

Before you can start performing Python automation testing using UnitTest, you would need to:

  • Install the latest Python build from the official website. We recommend using the latest version.
  • Make sure pip is installed in your system. You can install pip from pip documentation.
  • Download the latest Selenium Client and its WebDriver bindings from the official website. Latest versions of Selenium Client and WebDriver are ideal for running your automation script on LambdaTest Selenium cloud grid.
  • Install virtualenv which is the recommended way to run your tests. It will isolate the build from other setups you may have running and ensure that the tests run with the specified versions of the modules.
pip install virtualenv

Installing Selenium Dependencies and Tutorial Repo

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

git clone
cd Python-UnitTest-Selenium

Step 2: Create a virtual environment in your project folder the environment name is arbitrary.

virtualenv venv

Step 3: Activate the environment.

source venv/bin/activate

Step 4: Install the required packages from the cloned project directory:

pip install -r requirements.txt

Setting up Your Authentication

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

Step 5: Set LambdaTest Username and Access Key in environment variables.

  • For Linux/macOS:
  • For Windows:

Run Your First Test

Sample Test Case


import os
import unittest
import sys
from selenium import webdriver

username = os.environ.get("LT_USERNAME")
access_key = os.environ.get("LT_ACCESS_KEY")

class FirstSampleTest(unittest.TestCase):

# setUp runs before each test case
def setUp(self):
desired_caps = {
'LT:Options': {
"user": username,
"accessKey": access_key,
"build": "UnitTest-Selenium-Sample",
"name": "UnitTest-Selenium-Test",
"platformName": "Windows 11",
"selenium_version": "4.0.0"
"browserName": "Chrome",
"browserVersion": "latest",

self.driver = webdriver.Remote(

# tearDown runs after each test case

def tearDown(self):

def test_unit_user_should_able_to_add_item(self):
# try:
driver = self.driver

# Url

# Click on check box
check_box_one = driver.find_element_by_name("li1")

# Click on check box
check_box_two = driver.find_element_by_name("li2")

# Enter item in textfield
textfield = driver.find_element_by_id("sampletodotext")
textfield.send_keys("Yey, Let's add it to list")

# Click on add button
add_button = driver.find_element_by_id("addbutton")

# Verified added item
added_item = driver.find_element_by_xpath(

if __name__ == "__main__":

Configuration of Your Test Capabilities

Step 6: In 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:

capabilities = {
"build": "UnitTest-Selenium-Sample",
"name": "UnitTest-Selenium-Test",
"platformName": "Windows 11",
"browserName": "Chrome",
"browserVersion": "latest",

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

Executing the Test

Step 7: Please execute the command below to run your tests:


Your test results would be displayed on the test console (or command-line interface if you are using terminal/cmd) and on LambdaTest automation dashboard. LambdaTest Automation Dashboard will help you view all your text logs, screenshots and video recording for your entire automation tests.

Testing Locally Hosted or Privately Hosted Projects

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

"tunnel" : true