Fix tests

app/Form/Models/Form.php

@@ -41,11 +41,12 @@ class Form extends Model implements HasMedia
         'needs_prevention' => 'boolean',
         'prevention_text' => EditorData::class,
         'prevention_conditions' => Condition::class,
+        'from' => 'datetime',
+        'to' => 'datetime',
+        'registration_from' => 'datetime',
+        'registration_until' => 'datetime',
     ];
 
-    /** @var array<int, string> */
-    public $dates = ['from', 'to', 'registration_from', 'registration_until'];
-
     /**
      * @return SluggableConfig
      */

app/Invoice/Models/Invoice.php

@@ -28,12 +28,8 @@ class Invoice extends Model
         'to' => 'json',
         'status' => InvoiceStatus::class,
         'via' => BillKind::class,
-    ];
-
-    /** @var array<int, string> */
-    public $dates = [
-        'sent_at',
-        'last_remembered_at',
+        'sent_at' => 'datetime',
+        'last_remembered_at' => 'datetime',
     ];
 
     /**

tests/Feature/Invoice/InvoiceStoreActionTest.php

@@ -55,7 +55,7 @@ class InvoiceStoreActionTest extends TestCase
         ], $invoice->to);
     }
 
-    public function validationDataProvider(): Generator
+    public static function validationDataProvider(): Generator
     {
         yield [
             ['to.address' => ''],

tests/Feature/Invoice/InvoiceUpdateActionTest.php

@@ -98,7 +98,7 @@ class InvoiceUpdateActionTest extends TestCase
         $this->assertDatabaseCount('invoice_positions', 0);
     }
 
-    public function validationDataProvider(): Generator
+    public static function validationDataProvider(): Generator
     {
         yield [
             ['to.address' => ''],