diff --git a/core/modules/link/src/Tests/LinkFieldUITest.php b/core/modules/link/src/Tests/LinkFieldUITest.php
index d9531ce..99b3357 100644
--- a/core/modules/link/src/Tests/LinkFieldUITest.php
+++ b/core/modules/link/src/Tests/LinkFieldUITest.php
@@ -58,8 +58,12 @@ function testFieldUI() {
     // Add a link field to the newly-created type. It defaults to allowing both
     // internal and external links.
     $label = $this->randomMachineName();
+    $description = $this->randomMachineName();
     $field_name = Unicode::strtolower($label);
-    $this->fieldUIAddNewField($type_path, $field_name, $label, 'link');
+    $field_edit = [
+      'description' => $description,
+    ];
+    $this->fieldUIAddNewField($type_path, $field_name, $label, 'link', array(), $field_edit);
 
     // Load the formatter page to check that the settings summary does not
     // generate warnings.
@@ -67,31 +71,80 @@ function testFieldUI() {
     $this->drupalGet("$type_path/display");
     $this->assertText(t('Link text trimmed to @limit characters', array('@limit' => 80)));
 
-    // Test the help text displays when the link field allows both internal and
-    // external links.
-    $this->drupalLogin($this->drupalCreateUser(['create ' . $type->id() . ' content']));
-    $this->drupalGet($add_path);
-    $this->assertRaw('You can also enter an internal path such as <em class="placeholder">/node/add</em> or an external URL such as <em class="placeholder">http://example.com</em>.');
-
-    // Log in an admin to set up the next content type.
-    $this->drupalLogin($this->adminUser);
-
-    // Add a different content type.
-    $type = $this->drupalCreateContentType();
-    $type_path = 'admin/structure/types/manage/' . $type->id();
-    $add_path = 'node/add/' . $type->id();
-
-    // Add a link field to the newly-created type. Specify it must allow
-    // external only links.
-    $label = $this->randomMachineName();
-    $field_name = Unicode::strtolower($label);
-    $field_edit = ['settings[link_type]' => LinkItemInterface::LINK_EXTERNAL];
-    $this->fieldUIAddNewField($type_path, $field_name, $label, 'link', array(), $field_edit);
-
-    // Test the help text displays when link allows only external links.
-    $this->drupalLogin($this->drupalCreateUser(['create ' . $type->id() . ' content']));
-    $this->drupalGet($add_path);
-    $this->assertRaw('This must be an external URL such as <em class="placeholder">http://example.com</em>.');
+    // There are many combinations of UI settings, where the description should
+    // show: variation on internal, external, both; cardinality (where the
+    // fieldset is hidden or used); and link text shown (required or optional)
+    // or disabled. There are two descriptions: field and URL help text.
+    $cardinalities = [1, 2];
+    $title_settings = [
+      DRUPAL_DISABLED,
+      DRUPAL_OPTIONAL,
+    ];
+    $link_types = [
+      LinkItemInterface::LINK_EXTERNAL,
+      LinkItemInterface::LINK_GENERIC,
+      LinkItemInterface::LINK_INTERNAL,
+    ];
+    // Test all variations of link types on all cardinalities.
+    foreach ($cardinalities as $cardinality) {
+      foreach ($link_types as $link_type) {
+        // Now, test this with both the title enabled and disabled.
+        foreach ($title_settings as $title_setting) {
+          // Log in an admin to set up a content type for this test.
+          $this->drupalLogin($this->adminUser);
+
+          // Add a new content type.
+          $type = $this->drupalCreateContentType();
+          $type_path = 'admin/structure/types/manage/' . $type->id();
+          $add_path = 'node/add/' . $type->id();
+
+          // Create a field for this content type with the current cardinality
+          // and link field settings.
+          $label = $this->randomMachineName();
+          $description = $this->randomMachineName();
+          $field_name = Unicode::strtolower($label);
+          $storage_edit = ['cardinality_number' => $cardinality];
+          $field_edit = [
+            'settings[link_type]' => $link_type,
+            'description' => $description,
+            'settings[title]' => $title_setting,
+          ];
+          $this->fieldUIAddNewField($type_path, $field_name, $label, 'link', $storage_edit, $field_edit);
+
+          // Log in a user that is allowed to create this content type, see if
+          // the user can see the expected help text.
+          $this->drupalLogin($this->drupalCreateUser(['create ' . $type->id() . ' content']));
+          $this->drupalGet($add_path);
+
+          // Check that the help texts we assume should be there, is there.
+          switch ($link_type) {
+            case LinkItemInterface::LINK_GENERIC:
+              // Check that the text for allowing both internal and external is
+              // present.
+              $this->assertRaw('You can also enter an internal path such as <em class="placeholder">/node/add</em> or an external URL such as <em class="placeholder">http://example.com</em>.');
+              break;
+
+            case LinkItemInterface::LINK_EXTERNAL:
+              // Check the external only link help text.
+              $this->assertRaw('This must be an external URL such as <em class="placeholder">http://example.com</em>.');
+              break;
+
+            case LinkItemInterface::LINK_INTERNAL:
+              // Internal links have no "system" description. Test that none of
+              // the above shows here.
+              $this->assertNoRaw('This must be an external URL such as <em class="placeholder">http://example.com</em>.');
+              $this->assertNoRaw('You can also enter an internal path such as <em class="placeholder">/node/add</em> or an external URL such as <em class="placeholder">http://example.com</em>.');
+              // And assert that the field prefix is the internal URL.
+              $this->assertRaw(rtrim(\Drupal::url('<front>', array(), array('absolute' => TRUE)), '/'));
+              break;
+
+          }
+          // Also assert that the description we made is here, no matter what
+          // the cardinality or link setting.
+          $this->assertRaw($description);
+        }
+      }
+    }
   }
 
 }
diff --git a/core/modules/menu_link_content/src/Tests/MenuLinkContentFormTest.php b/core/modules/menu_link_content/src/Tests/MenuLinkContentFormTest.php
index 7129d38..d60cca7 100644
--- a/core/modules/menu_link_content/src/Tests/MenuLinkContentFormTest.php
+++ b/core/modules/menu_link_content/src/Tests/MenuLinkContentFormTest.php
@@ -42,6 +42,8 @@ public function testMenuLinkContentForm() {
     $element = $this->xpath('//select[@id = :id]/option[@selected]', array(':id' => 'edit-menu-parent'));
     $this->assertTrue($element, 'A default menu parent was found.');
     $this->assertEqual('admin:', $element[0]['value'], '<Administration> menu is the parent.');
+    // Test the field description is present.
+    $this->assertRaw('The location this menu link points to.');
 
     $this->drupalPostForm(
       NULL,
diff --git a/core/modules/shortcut/src/Tests/ShortcutLinksTest.php b/core/modules/shortcut/src/Tests/ShortcutLinksTest.php
index f910da5..6cc1c09 100644
--- a/core/modules/shortcut/src/Tests/ShortcutLinksTest.php
+++ b/core/modules/shortcut/src/Tests/ShortcutLinksTest.php
@@ -55,6 +55,11 @@ public function testShortcutLinkAdd() {
       '/admin/config/system/site-information',
     ];
 
+    // Test the add shortcut form UI. Test that the base field description is
+    // there.
+    $this->drupalGet('admin/config/user-interface/shortcut/manage/' . $set->id() . '/add-link');
+    $this->assertRaw('The location this shortcut points to.');
+
     // Check that each new shortcut links where it should.
     foreach ($test_cases as $test_path) {
       $title = $this->randomMachineName();