Reading the *highly experimental* notes in the manual about that feature doesn't want me to go into that. Feel free to add a ProcSymbolRun enum, the doCommand call could detect this mode and append the --symbolFiles:on --nimcache blah parameters before adding the testcase.nim filename. The parameter for nimcache could be generated like testcase_basename.nimcache to avoid collisions with others. Everything else could remain the same, plus you can use ProcSymbolRun prefix in test cases should that be needed.