Exclude charset from response content-type

src/Validation/ResponseValidator.php

@@ -124,7 +124,9 @@ protected function response(): Response
 
     protected function contentType(): ?string
     {
-        return $this->response->headers->get('Content-Type');
+        return $this->response->headers->get('Content-Type') !== null
+            ? Str::before($this->response->headers->get('Content-Type'), ';')
+            : null;
     }
 
     protected function schemaType(Schema $schema): ?string

tests/ResponseValidatorTest.php

@@ -173,6 +173,23 @@ public function test_validates_valid_problem_json_response()
             ->assertValidResponse(422);
     }
 
+    public function test_validates_valid_response_with_charset()
+    {
+        Route::get('/users', function () {
+            return response()->json([
+                [
+                    'id' => 1,
+                    'name' => 'Jim',
+                    'email' => '[email protected]',
+                ],
+            ], 422, ['Content-Type' => 'application/json; charset=utf-8']);
+        })->middleware(Middleware::class);
+
+        $this->getJson('/users')
+            ->assertValidRequest()
+            ->assertValidResponse(422);
+    }
+
     public function test_validates_invalid_content_type(): void
     {
         Route::get('/users', static function () {