[I've never used any mutation testing tools either.] In general it doesn't require language-level support, of course - you can just make a change and rebuild i

[I've never used any mutation testing tools either.] In general it doesn't require language-level support, of course - you can just make a change and rebuild it, à la Stryker https://stryker-mutator.io/docs/stryker-net/technical-reference/research/ https://stryker-mutator.io/docs/stryker-net/technical-refere... . PITest operates on JVM bytecode (https://pitest.org/ https://pitest.org/) for orders of magnitude speedup.