Introduction to the special issue on automation of software test and test code quality.

However, if on the one side it is now generally accepted that disciplined procedures and quality standards should be applied in production code development, on the other side, comparable levels of rigor and quality are not demanded for the code written for testing that production code. Recently, both researchers and practitioners have proposed solutions toward this problem by identifying test code smells or test code quality issues and providing techniques to automatically detect and repair test code bugs and flakiness. We are pleased to present the papers selected for inclusion in the special issue devoted to the 1st International Conference on Automation of Software Test, which was held virtually in colocation with the 42nd IEEE/ACM International Conference on Software Engineering (ICSE 2020). [Extracted from the article]