Escaped Mutant for Mutator "CastString": --- Original +++ New @@ @@ return $argument; } $values = implode(',', $this->reject); - throw new InvalidArgumentException((string) message('Argument value provided `%provided%` is on rejected list `%value%`', provided: strval($argument), value: "[{$values}]")); + throw new InvalidArgumentException(message('Argument value provided `%provided%` is on rejected list `%value%`', provided: strval($argument), value: "[{$values}]")); } if ($this->min() !== null && $argument < $this->min()) { throw new InvalidArgumentException((string) message('Argument value provided `%provided%` is less than `%min%`', provided: strval($argument), min: strval($this->min())));