only in patch2:
unchanged:
--- a/core/modules/block/src/Tests/Views/DisplayBlockTest.php
+++ b/core/modules/block/src/Tests/Views/DisplayBlockTest.php
@@ -288,8 +288,13 @@ public function testBlockContextualLinks() {
     $response = $this->drupalPost('contextual/render', 'application/json', $post, array('query' => array('destination' => 'test-page')));
     $this->assertResponse(200);
     $json = Json::decode($response);
-    $this->assertIdentical($json[$id], '<ul class="contextual-links"><li class="block-configure"><a href="' . base_path() . 'admin/structure/block/manage/' . $block->id() . '">Configure block</a></li><li class="entityviewedit-form"><a href="' . base_path() . 'admin/structure/views/view/test_view_block/edit/block_1">Edit view</a></li></ul>');
-    $this->assertIdentical($json[$cached_id], '<ul class="contextual-links"><li class="block-configure"><a href="' . base_path() . 'admin/structure/block/manage/' . $cached_block->id() . '">Configure block</a></li><li class="entityviewedit-form"><a href="' . base_path() . 'admin/structure/views/view/test_view_block/edit/block_1">Edit view</a></li></ul>');
+    $this->setRawContent($json[$id]);
+    $result = $this->xpath('//ul/li/a[contains(@href, :block) and text()="Configure block"]', [':block' => "admin/structure/block/manage/" . $block->id()]);
+    $this->assertTrue($result, 'The contextual links are present.');
+    $this->setRawContent($json[$cached_id]);
+    $result = $this->xpath('//ul/li/a[contains(@href, :cached_block) and text()="Configure block"]', [':cached_block' => "admin/structure/block/manage/" . $cached_block->id()]);
+    $this->assertTrue($result, 'The contextual links are present.');
+
   }
 
 }