vlib/v/checker/tests/test_functions_wrong_signature_test.vv:9:1: error: test functions should either return nothing at all, or be marked to return `?` or `!`
    7 | 
    8 | // should be disallowed:
    9 | fn test_returning_int() int {
      | ~~~~~~~~~~~~~~~~~~~~~~~~~~~
   10 | }
   11 |
vlib/v/checker/tests/test_functions_wrong_signature_test.vv:9:1: error: missing return at end of function `test_returning_int`
    7 | 
    8 | // should be disallowed:
    9 | fn test_returning_int() int {
      | ~~~~~~~~~~~~~~~~~~~~~~~~~~~
   10 | }
   11 |
vlib/v/checker/tests/test_functions_wrong_signature_test.vv:19:1: error: test functions should take 0 parameters
   17 | 
   18 | // should be disallowed:
   19 | fn test_take_parameters(v int) {
      | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   20 | }