What is the name of the testing that helps overcome the pesticide effect?

Regression testing.

This testing verifies that changes in the code (bug fixes, addition of new features) do not damage existing functionality and do not introduce new defects.

The pesticide effect occurs when the same test scenarios are used repeatedly and stop finding new defects. Regression testing counters this because the test suite is constantly updated and supplemented based on the analysis of new changes and identified defects. Automating regression testing is especially effective for its regular and quick execution.