diff --git a/modules/opencase_cases/src/Form/OCCaseRevisionRevertForm.php b/modules/opencase_cases/src/Form/OCCaseRevisionRevertForm.php
index f36b44f..0db390c 100644
--- a/modules/opencase_cases/src/Form/OCCaseRevisionRevertForm.php
+++ b/modules/opencase_cases/src/Form/OCCaseRevisionRevertForm.php
@@ -56,10 +56,10 @@ class OCCaseRevisionRevertForm extends ConfirmFormBase {
    * {@inheritdoc}
    */
   public static function create(ContainerInterface $container) {
-    return new static(
-      $container->get('entity.manager')->getStorage('oc_case'),
-      $container->get('date.formatter')
-    );
+    return new static($container
+      ->get('entity_type.manager')
+      ->getStorage('oc_case'), $container
+      ->get('date.formatter'));
   }
 
   /**
diff --git a/tests/src/Unit/OCCaseRevisionRevertFormTest.php b/tests/src/Unit/OCCaseRevisionRevertFormTest.php
new file mode 100644
index 0000000..b68904d
--- /dev/null
+++ b/tests/src/Unit/OCCaseRevisionRevertFormTest.php
@@ -0,0 +1,40 @@
+<?php declare(strict_types = 1);
+
+namespace Drupal\Tests\opencase\Unit;
+
+use Drupal\opencase_cases\Form\OCCaseRevisionRevertForm;
+use Drupal\Tests\UnitTestCase;
+use Drupal\Core\Form\FormState;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\RequestStack;
+use Drupal\Core\DependencyInjection\ContainerBuilder;
+
+class OCCaseRevisionRevertFormTest extends UnitTestCase{
+    public function setUp(): void {
+        $container = new ContainerBuilder();
+        $entityTypeManager = $this->getMockBuilder('\\Drupal\\Core\\Entity\\EntityTypeManager')->disableOriginalConstructor()->getMock();
+        $dateFormatter = $this->getMockBuilder('\\Drupal\\Core\\Datetime\\DateFormatterInterface')->disableOriginalConstructor()->getMock();
+        $storage = $this->getMockBuilder('\\Drupal\\Core\\Entity\\EntityStorageInterface')->disableOriginalConstructor()->getMock();
+        $revision = $this->getMockBuilder('\\Drupal\\opencase_cases\\Entity\OCCase')->disableOriginalConstructor()->getMock();
+        $request = new Request([], [], [], [], [], [], [], json_encode([
+            'foo' => 'bar'
+        ]));
+        $requestStack = new RequestStack();
+        $requestStack->push($request);
+        $dateFormatter->method('format');
+        $container->set('entity_type.manager', $entityTypeManager);
+        $container->set('date.formatter', $dateFormatter);
+        $entityTypeManager->method('getStorage')->willReturn($storage);
+        $storage->method('loadRevision')->willReturn($revision);
+        $container->set('string_translation', self::getStringTranslationStub());
+        $container->set('request_stack', $requestStack);
+        \Drupal::setContainer($container);
+        $this->reverter = OCCaseRevisionRevertForm::create($container);
+    }
+
+    public function testBuildForm():void {
+        $form = [];
+        $this->assertTrue(is_array($this->reverter->buildForm($form, new FormState())));
+    }
+
+}