Why don't tests run even though the script finds them?

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I'm trying to run the tests, the script writes that No tests found, but at the same time it seems like 58 tests are:

$ yarn unit
yarn run v1.16.0
$ cross-env yarn unit:watch --coverage  --watchAll=false '.*Service.js'
$ react-scripts test --env=jsdom --testMatch '**/?(*.)test.[tj]s?(x)' --coverage --watchAll=false '.*Service.js'
No tests found, exiting with code 1
Run with `--passWithNoTests` to exit with code 0
In /home/...
  229 files checked.
  testMatch: **/?(*.)test.[tj]s?(x) - 58 matches
  testPathIgnorePatterns: /node_modules/ - 229 matches
  testRegex:  - 0 matches
Pattern: .*Service.js - 0 matches
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.