diff --git a/src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php b/src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php
index 14baa4d22a5c..22dde6e6f9d0 100644
--- a/src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php
+++ b/src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php
@@ -1308,7 +1308,7 @@ protected function isClassDeviable($key)
     protected function isClassSerializable($key)
     {
         return $this->isClassCastable($key) &&
-            method_exists($this->parseCasterClass($this->getCasts()[$key]), 'serialize');
+            method_exists($this->resolveCasterClass($key), 'serialize');
     }
 
     /**
diff --git a/tests/Integration/Database/DatabaseEloquentModelCustomCastingTest.php b/tests/Integration/Database/DatabaseEloquentModelCustomCastingTest.php
index 474b5682fc7e..87133f6d4353 100644
--- a/tests/Integration/Database/DatabaseEloquentModelCustomCastingTest.php
+++ b/tests/Integration/Database/DatabaseEloquentModelCustomCastingTest.php
@@ -230,6 +230,7 @@ public function testWithCastableInterface()
         ]);
 
         $this->assertInstanceOf(ValueObject::class, $model->value_object_with_caster);
+        $this->assertSame(serialize(new ValueObject('hello')), $model->toArray()['value_object_with_caster']);
 
         $model->setRawAttributes([
             'value_object_caster_with_argument' => null,
@@ -418,7 +419,7 @@ public function __construct(string $name)
 
     public static function castUsing(array $arguments)
     {
-        return new class(...$arguments) implements CastsAttributes
+        return new class(...$arguments) implements CastsAttributes, SerializesCastableAttributes
         {
             private $argument;
 
@@ -440,6 +441,11 @@ public function set($model, $key, $value, $attributes)
             {
                 return serialize($value);
             }
+
+            public function serialize($model, $key, $value, $attributes)
+            {
+                return serialize($value);
+            }
         };
     }
 }