test parallelization (Rails 6 or later version + Minitest) ▶ Use third-party gems such as parallel_tests, rrrspec ▶ Use SaaS supporting parallel tests such as CircleCI
▶ E.g. grouping test suites into small, medium, and large or domain expert groups # To run tests only having :small tag $ rspec --tag small # To run tests only having :large tag $ rspec --tag large
w/ optimizations w/o optimizations Reduce time shift-left Reduce time Reduce time & shift-left AI based test optimization is language agnostic and interesting as for new solution