Mutations are not getting created

[schroderd]

Hello,

I followed the official documentation when trying to Mutation-Test my project. But there are no Mutations created. Has anyone else had this problem or knows of a solution?

I am using Pest v3.0.6.

./vendor/bin/pest --group="registration" --mutate --covered-only

  ...........................................................................................................................s...

  Tests:    1 skipped, 126 passed (304 assertions)
  Duration: 99.80s

  Mutating application files...
  0 Mutations for 0 Files created
  Mutations: 0 tested
  Score:     0.00%
  Duration:  0.01s

   INFO  No mutations created.

Thank you for your help.