diff --git a/core/modules/config/tests/src/FunctionalJavascript/ConfigEntityTest.php b/core/modules/config/tests/src/FunctionalJavascript/ConfigEntityTest.php
index b58c6a8..e05528a 100644
--- a/core/modules/config/tests/src/FunctionalJavascript/ConfigEntityTest.php
+++ b/core/modules/config/tests/src/FunctionalJavascript/ConfigEntityTest.php
@@ -51,7 +51,7 @@ public function testCRUDUI() {
     $assert_session->statusCodeEquals(200);
     $assert_session->responseContains($message_insert);
     $assert_session->responseNotContains($message_update);
-    $this->assertNotNull($page->find('css', 'a[href="/admin/structure/config_test/manage/' . $id . '"]'));
+    $assert_session->linkByHrefExists("admin/structure/config_test/manage/$id");
 
     // Update the configuration entity.
     $this->drupalGet("admin/structure/config_test/manage/$id");
@@ -61,8 +61,8 @@ public function testCRUDUI() {
     $assert_session->statusCodeEquals(200);
     $assert_session->responseNotContains($message_insert);
     $assert_session->responseContains($message_update);
-    $this->assertNotNull($page->find('css', 'a[href="/admin/structure/config_test/manage/' . $id . '"]'));
-    $this->assertNotNull($page->find('css', 'a[href="/admin/structure/config_test/manage/' . $id . '/delete"]'));
+    $assert_session->linkByHrefExists("admin/structure/config_test/manage/$id");
+    $assert_session->linkByHrefExists("admin/structure/config_test/manage/$id/delete");
 
     // Delete the configuration entity.
     $this->drupalGet("admin/structure/config_test/manage/$id");
@@ -75,7 +75,7 @@ public function testCRUDUI() {
     $assert_session->responseNotContains($message_update);
     $assert_session->responseContains($message_delete);
     $assert_session->responseNotContains($label1);
-    $this->assertNull($page->find('css', 'a[href="/admin/structure/config_test/manage/' . $id . '"]'));
+    $assert_session->linkByHrefNotExists("admin/structure/config_test/manage/$id");
 
     // Re-create a configuration entity.
     $this->drupalGet('admin/structure/config_test/add');
@@ -86,7 +86,7 @@ public function testCRUDUI() {
     $assert_session->addressEquals('admin/structure/config_test');
     $assert_session->statusCodeEquals(200);
     $assert_session->responseContains($label1);
-    $this->assertNotNull($page->find('css', 'a[href="/admin/structure/config_test/manage/' . $id . '"]'));
+    $assert_session->linkByHrefExists("admin/structure/config_test/manage/$id");
 
     // Rename the configuration entity's ID/machine name.
     $new_id = strtolower($this->randomMachineName());
@@ -100,10 +100,8 @@ public function testCRUDUI() {
     $assert_session->responseNotContains($label1);
     $assert_session->responseNotContains($label2);
     $assert_session->responseContains($label3);
-    $this->assertNull($page->find('css', 'a[href="/admin/structure/config_test/manage/' . $id . '"]'));
-
-    $id = $new_id;
-    $this->assertNotNull($page->find('css', 'a[href="/admin/structure/config_test/manage/' . $id . '"]'));
+    $assert_session->linkByHrefNotExists("admin/structure/config_test/manage/$id");
+    $assert_session->linkByHrefExists("admin/structure/config_test/manage/$new_id");
 
     // Create a configuration entity with '0' machine name.
     $this->drupalGet('admin/structure/config_test/add');
@@ -114,8 +112,7 @@ public function testCRUDUI() {
     $assert_session->statusCodeEquals(200);
     $message_insert = new FormattableMarkup('%label configuration has been created.', ['%label' => '0']);
     $assert_session->responseContains($message_insert);
-
-    $this->assertNotNull($page->find('css', 'a[href="/admin/structure/config_test/manage/0"]'));
+    $assert_session->linkByHrefExists("admin/structure/config_test/manage/0");
     $delete_link = $page->find('css', 'a[href="/admin/structure/config_test/manage/0/delete"]');
 
     // Expand the options.