feat(mutate): requires it by default

src/PendingCalls/TestCall.php

@@ -636,14 +636,9 @@ final class TestCall
     /**
      * Mutates the test.
      */
-    public function mutate(string $profile = 'default'): self|MutationTestCallDecorator // @phpstan-ignore-line
+    public function mutate(string $profile = 'default'): self|MutationTestCallDecorator
     {
-        if (class_exists(MutationTestCallDecorator::class)) {
-            return (new MutationTestCallDecorator($this))
-                ->mutate($profile);
-        }
-
-        return $this->__call('mutate', [$profile]);
+        return (new MutationTestCallDecorator($this))->mutate($profile);
     }
 
     /**

tests/Arch.php

@@ -37,6 +37,7 @@ arch('dependencies')
         'Termwind',
         'ParaTest',
         'Pest\Arch',
+        'Pest\Mutate\Decorators\TestCallDecorator',
         'Pest\Plugin',
         'NunoMaduro\Collision',
         'Whoops',