./errors.tests: line 246: kill: -s: option requires an argument
./errors.tests: line 248: kill: S: invalid signal specification
./errors.tests: line 250: kill: `': not a pid or valid job spec
./errors.tests: line 246: kill: -s: option requires an argument
./errors.tests: line 248: kill: S: invalid signal specification
./errors.tests: line 250: kill: `': not a pid or valid job spec