diff -u b/core/modules/contextual/tests/src/FunctionalJavascript/ContextualLinksTest.php b/core/modules/contextual/tests/src/FunctionalJavascript/ContextualLinksTest.php
--- b/core/modules/contextual/tests/src/FunctionalJavascript/ContextualLinksTest.php
+++ b/core/modules/contextual/tests/src/FunctionalJavascript/ContextualLinksTest.php
@@ -30,7 +30,7 @@
   /**
    * Tests the visibility of contextual links.
    */
-  public function testContextualLinksVisibilityAccessGained() {
+  public function testContextualLinksVisibility() {
     $this->drupalLogin($this->drupalCreateUser([
       'access contextual links'
     ]));
@@ -49,6 +49,9 @@
       'administer blocks',
     ]);
 
+    // Ensure the buttons have loaded.
+    $this->assertSession()->assertWaitOnAjaxRequest();
+
     $this->drupalGet('user');
     $this->assertSession()->elementExists('css', '.contextual button');