diff --git a/tests/Unit/ValidatorTest.php b/tests/Unit/ValidatorTest.php
index e456053..348cb3e 100644
--- a/tests/Unit/ValidatorTest.php
+++ b/tests/Unit/ValidatorTest.php
@@ -81,10 +81,18 @@ final class ValidatorTest extends TestCase
 
     #[Test]
 
-    public function enumIsLooseComparison(): void
+    public function inIsLooseComparison(): void
     {
-        $this->assertTrue(Validator::checkRule('1', 'enum:1,2,3'));
-        $this->assertFalse(Validator::checkRule('9', 'enum:1,2,3'));
+        $this->assertTrue(Validator::checkRule('1', 'in:1,2,3'));
+        $this->assertFalse(Validator::checkRule('9', 'in:1,2,3'));
+    }
+
+    #[Test]
+
+    public function enumRuleIsNoLongerRecognized(): void
+    {
+        $this->expectException(\Exception::class);
+        Validator::checkRule('1', 'enum:1,2,3');
     }
 
     #[Test]
@@ -100,7 +108,7 @@ final class ValidatorTest extends TestCase
     public function parseRule(): void
     {
         $this->assertSame(['required', ''], Validator::parseRule('required'));
-        $this->assertSame(['enum', 'a,b'], Validator::parseRule('enum:a,b'));
+        $this->assertSame(['in', 'a,b'], Validator::parseRule('in:a,b'));
         $this->assertSame(['regex', '/^a,b$/'], Validator::parseRule('regex:/^a,b$/'));
     }
 
@@ -168,7 +176,7 @@ final class ValidatorTest extends TestCase
         );
         $this->assertSame(
             'The selected status is invalid. Allowed: a, b, c.',
-            Validator::message('status.enum:a,b,c')
+            Validator::message('status.in:a,b,c')
         );
         $this->assertSame(
             'The reason field is required when mode is other.',