Balint Pekker
--- a/tests/src/Functional/CoreVersionUiTestTrait.php
+++ b/tests/src/Functional/CoreVersionUiTestTrait.php
        $edit['status[value]'] = 1;
      }
    }
-    $this->drupalPostForm($path, $edit, $submit);
+    if (!is_null($path)) {
+      $this->drupalGet($path);
+    }
+    $this->submitForm($edit, $submit);
--- a/src/Plugin/diff/Field/TextWithSummaryFieldBuilder.php
+++ b/src/Plugin/diff/Field/TextWithSummaryFieldBuilder.php
      if ($this->configuration['compare_format'] == 1) {
        if (isset($values['format'])) {
          $controller = $this->entityTypeManager->getStorage('filter_format');
+          /** @var \Drupal\filter\Entity\FilterFormat $format */
          $format = $controller->load($values['format']);
          // The format loaded successfully.
          $label = $this->t('Format');
          if ($format != NULL) {
-            $result[$field_key][] = $label . ": " . $format->name;
+            $result[$field_key][] = $label . ": " . $format->get('name')->value;
--- a/src/DiffBuilderManager.php
+++ b/src/DiffBuilderManager.php
        $bundles = $field_storage_definition->getBundles();
        $query->condition('bundle', (array) $bundles, 'IN');
      }
-      $result = $query->exists($field_key)->range(0, 1)->execute();
+      $result = $query
+        ->exists($field_key)
+        ->range(0, 1)
+        ->accessCheck()
+        ->execute();
--- a/tests/src/Functional/DiffRevisionTest.php
+++ b/tests/src/Functional/DiffRevisionTest.php
    $this->submitForm([], 'Compare selected revisions');
    $this->clickLink('Split fields');
    // Assert breadcrumbs are properly displayed.
-    $this->assertSession()->responseContains('<nav class="breadcrumb"');
+    $this->assertSession()->responseContains('<h2 id="system-breadcrumb" class="visually-hidden">Breadcrumb</h2>');