5 Common Mistakes To Avoid In Playwright Automation Testing


Playwright is an open-source Node.js library used for automating web browser interactions. It was developed by Microsoft and provides a single API for automating Chrome, Firefox, Safari, and Edge browsers. Playwright design philosophy is to provide fast, reliable, and stable automation for modern web applications. Playwright’s architecture is based on the Chromium DevTools Protocol, which allows it to control and manipulate web browsers using high-level API calls.

This enables developers and testers to write scripts in JavaScript or TypeScript to simulate user actions, perform automated testing, and extract data from web applications.  Playwright requires careful usage to avoid common mistakes that can lead to inaccurate results and wasted time.

In this article, we will discuss five common mistakes to avoid in Playwright Automation Testing.


Failing to wait for page elements to load

One common mistake that can occur during Playwright automation testing is failing to wait for page elements to load. This mistake can cause automated tests to fail or produce inaccurate results, as the script may attempt to interact with elements on the page before they have finished loading. To avoid this mistake, it is important to use proper waiting strategies when automating interactions with web pages.

Playwright provides several options for waiting for page elements to load, including waiting for a specific element to appear, waiting for the page to finish loading, or waiting for a specific amount of time before continuing with the script.One way to wait for an element to appear is to use the waitForSelector() method, which waits for a specific element to appear in the DOM before proceeding with the script. This method takes a selector string as its argument, which can be a CSS selector or an XPath expression.

Another waiting strategy is to use the waitForNavigation() method, which waits for the page to finish loading after a navigation event, such as clicking a link or submitting a form. This method takes an optional timeout parameter, which specifies how long to wait for the page to finish loading before timing out.

Hard-coding test data

One common mistake that can occur during Playwright automation testing is hard coding test data. Hard coding test data refers to the practice of embedding specific data values directly into the test script, rather than using external data sources or variables.

Hard coding test data can be problematic for a few reasons. Firstly, it can make test scripts less flexible and more difficult to maintain. If the test data needs to be changed, the script must be updated manually, which can be time-consuming and error-prone. Additionally, hard-coded data can lead to false positives or false negatives in test results, as the test data may not accurately reflect the range of values that the system may encounter in production.

To avoid this mistake, it is important to use external data sources or variables when defining test data in Playwright automation testing. For example, test data could be stored in a CSV or JSON file, or retrieved from a database or API. This approach allows for more flexible test data management, as data can be updated or modified independently of the test script.

In Playwright, one way to use external test data is to create a data-driven test, which iterates over a set of test data values and performs the same set of actions for each value. This approach can be useful for testing variations of the same functionality, or for testing different input values for a form or input field.

Ignoring cross-browser compatibility

Cross-browser compatibility is the ability of a website or application to function as intended across different web browsers such as Google Chrome, Mozilla Firefox, Microsoft Edge, and others. It is a crucial aspect of web development as users may access the same website using different browsers on various devices, such as laptops, tablets, and mobile phones.

In the context of Playwright Automation Testing, ignoring cross-browser compatibility can lead to several issues. For example different browsers may interpret HTML, CSS, and JavaScript differently, leading to inconsistent behavior of the website or application. This means that a particular feature or functionality may work correctly in one browser but may not work as intended in another browser. Ignoring cross-browser compatibility may result in overlooking these issues, leading to a website or application that works only in specific browsers.

Ignoring cross-browser compatibility can lead to broken functionality, meaning that certain features or functionality may not work in some browsers. For example, a button that works correctly in Chrome may not work in Firefox. These broken functionalities can result in a poor user experience and may impact the overall performance of the website or application.

LambdaTest offers a cloud-based cross-browser testing platform that allows you to perform Playwright automation testing on a variety of browser configurations, ensuring that your website or application is compatible with all major browsers.

Not reporting test results

One of the most common mistakes in Playwright automation testing is not reporting test results. Test results are critical in determining the success or failure of automated tests. By not reporting test results, developers and testers are unable to analyze the performance of the application and identify any bugs or issues that need to be fixed. This can lead to delays in identifying and resolving critical issues, ultimately affecting the quality of the application.

There are several reasons why not reporting test results can be problematic. Without test results, it becomes challenging for developers and testers to understand what happened during the test, and where the issues may be. This lack of visibility can result in delays in identifying and resolving issues, which can affect the overall quality of the application.

If a test fails and the results are not reported, it can be challenging to reproduce the issue. This can result in significant delays in resolving the problem, which can impact the development schedule. Test results provide accountability for developers and testers, allowing them to track progress and identify areas that need improvement. Without this visibility, it becomes difficult to hold team members accountable for their work.

To avoid this mistake, it is essential to ensure that test results are reported accurately and consistently. This can be done by setting up a reliable and robust test reporting system that provides clear and concise feedback on the results of each test. It is also important to establish clear reporting standards and guidelines to ensure that all team members report their results consistently.

Test results

Failing to handle exceptions

In Playwright automation testing, handling exceptions is a crucial aspect that needs to be taken into consideration. Failing to handle exceptions can have a significant impact on the effectiveness of the testing process and lead to incomplete and unreliable test results.

Exceptions occur when an unexpected or unforeseen event occurs during the test execution process. This can happen due to a variety of reasons such as incorrect inputs, network connectivity issues, server errors, or unexpected system behaviors. If these exceptions are not handled properly, they can cause the testing process to stop abruptly, and any further testing will not be possible.

Failing to handle exceptions can also result in false-positive or false-negative test results. This can happen if an exception is thrown but not properly handled, leading the test script to continue executing as if everything is working correctly. As a result, it can give a false sense of security that the application is functioning as expected when in reality, it is not.

LambdaTest offers several solutions to address this problem. One solution is the ability to run tests on multiple browsers and operating systems simultaneously. This allows developers to identify and isolate issues that may be specific to certain configurations. Additionally, LambdaTest provides access to a vast library of pre-built integrations, including several popular bug tracking tools like JIRA and Trello. This helps users to efficiently track issues and resolve them quickly.

Handling exceptions is an integral part of the Playwright automation testing process. It ensures that the testing process continues to run smoothly and that any exceptions that occur are properly handled, leading to accurate and reliable test results. By properly handling exceptions, developers can identify and fix any issues in the application quickly, ensuring that it is ready for deployment.


Playwright automation testing is a powerful tool that enables developers to test web applications and improve their quality. However, testers should avoid common mistakes to ensure accurate and reliable results. Testers should wait for page elements to load, separate test data from scripts, test on all supported browsers, report test results, and handle exceptions. By following these best practices, testers can create robust and maintainable test suites that improve the quality of web applications.

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