diff --git a/core/modules/outside_in/outside_in.module b/core/modules/outside_in/outside_in.module
index 298b994..dfba07e 100644
--- a/core/modules/outside_in/outside_in.module
+++ b/core/modules/outside_in/outside_in.module
@@ -39,6 +39,10 @@ function outside_in_contextual_links_view_alter(&$element, $items) {
       'data-dialog-type' => 'dialog',
       'data-dialog-renderer' => 'offcanvas',
     ];
+    // If this is content block change title to avoid duplicate "Quick Edit".
+    if (isset($element['#links']['block-contentblock-edit'])) {
+      $element['#links']['outside-inblock-configure']['title'] .= ' settings';
+    }
 
     $element['#attached']['library'][] = 'outside_in/drupal.off_canvas';
   }
diff --git a/core/modules/outside_in/tests/src/FunctionalJavascript/OutsideInBlockFormTest.php b/core/modules/outside_in/tests/src/FunctionalJavascript/OutsideInBlockFormTest.php
index dd79fc2..7044e9a 100644
--- a/core/modules/outside_in/tests/src/FunctionalJavascript/OutsideInBlockFormTest.php
+++ b/core/modules/outside_in/tests/src/FunctionalJavascript/OutsideInBlockFormTest.php
@@ -2,6 +2,9 @@
 
 namespace Drupal\Tests\outside_in\FunctionalJavascript;
 
+use Drupal\block_content\Entity\BlockContent;
+use Drupal\block_content\Entity\BlockContentType;
+
 /**
  * Testing opening and saving block forms in the off-canvas tray.
  *
@@ -22,6 +25,7 @@ class OutsideInBlockFormTest extends OutsideInJavascriptTestBase {
     'outside_in',
     'quickedit',
     'search',
+    'block_content',
   ];
 
   /**
@@ -29,6 +33,10 @@ class OutsideInBlockFormTest extends OutsideInJavascriptTestBase {
    */
   protected function setUp() {
     parent::setUp();
+
+    $this->createBlockContentType('basic', TRUE);
+    $block_content = $this->createBlockContent('Custom Block', 'basic', TRUE);
+
     // @todo Ensure that this test class works against bartik and stark:
     //   https://www.drupal.org/node/2784881.
     $this->enableTheme('bartik');
@@ -42,6 +50,7 @@ protected function setUp() {
     ]);
     $this->drupalLogin($user);
 
+    $this->placeBlock('block_content:' . $block_content->uuid(), ['id' => 'custom']);
     $this->placeBlock('system_powered_by_block', ['id' => 'powered']);
     $this->placeBlock('system_branding_block', ['id' => 'branding']);
     $this->placeBlock('search_form_block', ['id' => 'search']);
@@ -116,6 +125,20 @@ public function testBlocks() {
       // Exit edit mode.
       $this->toggleEditingMode();
     }
+
+    // Check custom block labels.
+    // "Quick edit" is quickedit.module link.
+    // "Quick edit settings" is outside_in.module link.
+    $links = $page->findAll('css', "#block-custom .contextual-links li a");
+    $link_labels = [];
+    /** @var \Behat\Mink\Element\NodeElement $link */
+    foreach ($links as $link) {
+      $link_labels[$link->getAttribute('href')] = $link->getText();
+    }
+    $href = array_search('Quick edit', $link_labels);
+    self::assertEquals('', $href);
+    $href = array_search('Quick edit settings', $link_labels);
+    self::assertEquals('/admin/structure/block/manage/custom/offcanvas?destination=user/2', $href);
   }
 
   /**
@@ -155,4 +178,60 @@ protected function openBlockForm($block_selector) {
     $this->waitForOffCanvasToOpen();
     $this->assertOffCanvasBlockFormIsValid();
   }
+
+  /**
+   * Creates a custom block.
+   *
+   * @param bool|string $title
+   *   (optional) Title of block. When no value is given uses a random name.
+   *   Defaults to FALSE.
+   * @param string $bundle
+   *   (optional) Bundle name. Defaults to 'basic'.
+   * @param bool $save
+   *   (optional) Whether to save the block. Defaults to TRUE.
+   *
+   * @return \Drupal\block_content\Entity\BlockContent
+   *   Created custom block.
+   */
+  protected function createBlockContent($title = FALSE, $bundle = 'basic', $save = TRUE) {
+    $title = $title ?: $this->randomMachineName();
+    $block_content = BlockContent::create([
+      'info' => $title,
+      'type' => $bundle,
+      'langcode' => 'en',
+      'body' => [
+        'value' => 'The name "llama" was adopted by European settlers from native Peruvians.',
+        'format' => 'plain_text',
+      ],
+    ]);
+    if ($block_content && $save === TRUE) {
+      $block_content->save();
+    }
+    return $block_content;
+  }
+
+  /**
+   * Creates a custom block type (bundle).
+   *
+   * @param string $label
+   *   The block type label.
+   * @param bool $create_body
+   *   Whether or not to create the body field.
+   *
+   * @return \Drupal\block_content\Entity\BlockContentType
+   *   Created custom block type.
+   */
+  protected function createBlockContentType($label, $create_body = FALSE) {
+    $bundle = BlockContentType::create([
+      'id' => $label,
+      'label' => $label,
+      'revision' => FALSE,
+    ]);
+    $bundle->save();
+    if ($create_body) {
+      block_content_add_body_field($bundle->id());
+    }
+    return $bundle;
+  }
+
 }