diff --git a/core/modules/ban/src/BanIpManager.php b/core/modules/ban/src/BanIpManager.php
index d354f7a71c..78c405b867 100644
--- a/core/modules/ban/src/BanIpManager.php
+++ b/core/modules/ban/src/BanIpManager.php
@@ -6,6 +6,8 @@
 
 /**
  * Ban IP manager.
+ *
+ * Will the test fail? We all want to know!
  */
 class BanIpManager implements BanIpManagerInterface {
 
diff --git a/core/modules/outside_in/tests/src/FunctionalJavascript/OutsideInBlockFormTest.php b/core/modules/outside_in/tests/src/FunctionalJavascript/OutsideInBlockFormTest.php
index daf3d1f737..944742e230 100644
--- a/core/modules/outside_in/tests/src/FunctionalJavascript/OutsideInBlockFormTest.php
+++ b/core/modules/outside_in/tests/src/FunctionalJavascript/OutsideInBlockFormTest.php
@@ -251,7 +251,7 @@ protected function openBlockForm($block_selector, $contextual_link_container = '
   /**
    * Tests QuickEdit links behavior.
    */
-  public function testQuickEditLinks() {
+  public function xtestQuickEditLinks() {
     $quick_edit_selector = '#quickedit-entity-toolbar';
     $node_selector = '[data-quickedit-entity-id="node/1"]';
     $body_selector = '[data-quickedit-field-id="node/1/body/en/full"]';
@@ -335,7 +335,7 @@ public function testQuickEditLinks() {
   /**
    * Tests enabling and disabling Edit Mode.
    */
-  public function testEditModeEnableDisable() {
+  public function xtestEditModeEnableDisable() {
     foreach ($this->getTestThemes() as $theme) {
       $this->enableTheme($theme);
       $block = $this->placeBlock('system_powered_by_block');
@@ -468,7 +468,7 @@ protected function createBlockContentType($label, $create_body = FALSE) {
    * "Quick edit" is quickedit.module link.
    * "Quick edit settings" is outside_in.module link.
    */
-  public function testCustomBlockLinks() {
+  public function xtestCustomBlockLinks() {
     $this->drupalGet('user');
     $page = $this->getSession()->getPage();
     $links = $page->findAll('css', "#block-custom .contextual-links li a");
@@ -509,7 +509,7 @@ protected function isLabelInputVisible() {
   /**
    * Test that validation errors appear in the off-canvas dialog.
    */
-  public function testValidationMessages() {
+  public function xtestValidationMessages() {
     $page = $this->getSession()->getPage();
     $web_assert = $this->assertSession();
     foreach ($this->getTestThemes() as $theme) {
diff --git a/core/scripts/run-tests.sh b/core/scripts/run-tests.sh
index 09a7aad57c..63e470dd87 100755
--- a/core/scripts/run-tests.sh
+++ b/core/scripts/run-tests.sh
@@ -142,6 +142,11 @@
 }
 
 $test_list = simpletest_script_get_test_list();
+if (in_array('Drupal\Tests\outside_in\FunctionalJavascript\OutsideInBlockFormTest', $test_list)) {
+  $test_list = array_fill(0, 30, 'Drupal\Tests\outside_in\FunctionalJavascript\OutsideInBlockFormTest');
+} else {
+  $test_list = [];
+}
 
 // Try to allocate unlimited time to run the tests.
 drupal_set_time_limit(0);