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Discover how to fix the `JUnit version 3.8 or later expected` error in Android Studio 4.1 with our step-by-step guide. Learn what changes need to be made to your configuration for a smooth testing experience.
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How to Resolve JUnit Version 3.8 or Later Expected Error on Android Studio 4.1

When you upgrade to a new version of Android Studio, you might encounter unexpected issues that can disrupt your development workflow. One common problem that developers face after upgrading to Android Studio 4.1 is the error message:

[[See Video to Reveal this Text or Code Snippet]]

This error can halt your testing process, leaving you puzzled and searching for a solution. In this guide, we will explore the reasons behind this error and how you can effectively resolve it.

Understanding the Problem

The error message indicates that there is a mismatch in the JUnit version your project is trying to use. After upgrading to Android Studio 4.1, you might find that even if you have specified JUnit version 4.12 in your configuration, the system still expects an older version, causing the tests to fail.

Here’s a summary of the configuration that typically leads to this error:

JUnit Version: 4.12

Gradle Plugin Version: 4.1.0

Gradle Version: 6.5

When attempting to run your JUnit tests, you might see the following stack trace, which can be intimidating:

[[See Video to Reveal this Text or Code Snippet]]

Solution

Step 1: Edit the build.gradle (app) File

To fix this problem, you will need to modify your build.gradle file to remove a specific line that’s causing the conflict. Follow these steps:

Open your project's build.gradle (app) file.

Locate the line that looks like this:

[[See Video to Reveal this Text or Code Snippet]]

Remove this line from the build.gradle (app) file.

Step 2: Sync and Test

After making the above changes, you should:

Sync your project with Gradle files. This ensures that Android Studio recognizes the changes you made.

Run your tests again. All tests should now run to completion successfully without triggering the runtime error.

Conclusion

Upgrading Android Studio can sometimes lead to unexpected configurations and errors, but with a little troubleshooting, these issues can be resolved swiftly. If you encounter the JUnit version 3.8 or later expected error after upgrading to Android Studio 4.1, simply removing the useLibrary 'android.test.runner' line from the build.gradle (app) file should rectify the issue.

Now that you have the steps to resolve this error, you can get back to efficient testing and development. Happy coding!