You mentioned that you were able to significantly reduce the test run time. How did you achieve this?

Several approaches can be used to significantly reduce test run time:

• Parallel test execution. Utilize the capabilities of the testing framework (e.g., JUnit 5, TestNG) to run tests simultaneously on multiple threads or machines.

• Test optimization. Remove duplicate or redundant tests, reduce data preparation and cleanup time.

• Use of mocks and stubs. Instead of real integrations, use stubs to speed up tests.

• Incremental testing. Run only the tests that are affected by the changed code.

• Caching and reusing data. For example, prepare test data once and reuse it.

• Profiling and bottleneck elimination. Analyze which tests or parts of tests take the most time and optimize them.

Example of setting up parallel execution in TestNG:

<suite name="Suite" parallel="tests" thread-count="4">
    <test name="Test1">...</test>
    <test name="Test2">...</test>
</suite>

This approach can significantly reduce the overall test run time.