diff -u b/core/modules/views/config/schema/views.display.schema.yml b/core/modules/views/config/schema/views.display.schema.yml
--- b/core/modules/views/config/schema/views.display.schema.yml
+++ b/core/modules/views/config/schema/views.display.schema.yml
@@ -70,6 +70,7 @@
           label: 'Menu name'
     use_admin_theme:
       type: boolean
+      nullable: true
       label: 'Use the administration theme when rendering the view page'
 
 views.display.block:
diff -u b/core/modules/views/src/Plugin/views/display/Page.php b/core/modules/views/src/Plugin/views/display/Page.php
--- b/core/modules/views/src/Plugin/views/display/Page.php
+++ b/core/modules/views/src/Plugin/views/display/Page.php
@@ -254,18 +254,18 @@
     // therefore, we need to set the summary message to reflect this.
     $display_path = $this->getOption('path');
     if (!empty($display_path) && stripos($display_path, 'admin/') === 0) {
-      $admin_theme_text = $this->t("Yes (admin path)");
+      $admin_theme_text = $this->t('Yes (admin path)');
     }
     elseif ($this->getOption('use_admin_theme')) {
-      $admin_theme_text = $this->t("Yes");
+      $admin_theme_text = $this->t('Yes');
     }
     else {
-      $admin_theme_text = $this->t("No");
+      $admin_theme_text = $this->t('No');
     }
 
     $options['use_admin_theme'] = [
       'category' => 'page',
-      'title' => $this->t('Admin theme'),
+      'title' => $this->t('Administration theme'),
       'value' => $admin_theme_text,
       'desc' => $this->t('Use the administration theme when rendering this display.'),
     ];
@@ -475,8 +475,8 @@
         $form['#title'] .= $this->t('Administration theme');
         $form['use_admin_theme'] = [
           '#type' => 'checkbox',
-          '#title' => $this->t('Always use admin theme'),
-          '#description' => $this->t('Paths starting with "admin/" use the admin theme even when this option is not checked.'),
+          '#title' => $this->t('Always use the administration theme'),
+          '#description' => $this->t('Paths starting with "admin/" use the administration theme even when this option is not checked.'),
           '#default_value' => $this->getOption('use_admin_theme'),
         ];
         $display_path = $this->getOption('path');
diff -u b/core/modules/views/tests/src/Functional/Plugin/DisplayPageWebTest.php b/core/modules/views/tests/src/Functional/Plugin/DisplayPageWebTest.php
--- b/core/modules/views/tests/src/Functional/Plugin/DisplayPageWebTest.php
+++ b/core/modules/views/tests/src/Functional/Plugin/DisplayPageWebTest.php
@@ -148,7 +148,7 @@
   }
 
   /**
-   * Tests the 'admin_theme' page display option.
+   * Tests the 'use_admin_theme' page display option.
    */
   public function testAdminTheme() {
     $account = $this->drupalCreateUser(['view the administration theme']);
only in patch2:
unchanged:
--- a/core/modules/views_ui/tests/src/Functional/DisplayPathTest.php
+++ b/core/modules/views_ui/tests/src/Functional/DisplayPathTest.php
@@ -4,7 +4,9 @@
 
 use Drupal\Core\Menu\MenuTreeParameters;
 use Drupal\menu_link_content\Entity\MenuLinkContent;
+use Drupal\Tests\SchemaCheckTestTrait;
 use Drupal\Tests\system\Functional\Cache\AssertPageCacheContextsAndTagsTrait;
+use Drupal\views\Entity\View;
 
 /**
  * Tests the UI of generic display path plugin.
@@ -15,6 +17,7 @@
 class DisplayPathTest extends UITestBase {
 
   use AssertPageCacheContextsAndTagsTrait;
+  use SchemaCheckTestTrait;
 
   /**
    * {@inheritdoc}
@@ -286,4 +289,56 @@ public function testDefaultMenuTabRegression() {
     $this->assertSession()->statusCodeEquals(200);
   }
 
+  /**
+   * Tests the "Always use the administration theme" configuration.
+   *
+   * @see \Drupal\Tests\views\Functional\Plugin\DisplayPageWebTest::testAdminTheme
+   */
+  function testAlwaysAdminTheme() {
+    $this->drupalGet('admin/structure/views/view/test_view');
+
+    // Add a new page display.
+    $this->submitForm([], 'Add Page');
+    $this->assertSession()->pageTextContains('No path is set');
+    $this->assertSession()->pageTextContains('Administration theme: No');
+
+    // Test with a path starting with "/admin".
+    $admin_path = 'admin/test_admin_path';
+    $this->drupalGet('admin/structure/views/nojs/display/test_view/page_1/path');
+    $this->submitForm(['path' => $admin_path], 'Apply');
+    $this->assertSession()->pageTextContains('/' . $admin_path);
+    $this->assertSession()->pageTextContains('Administration theme: Yes (admin path)');
+    $this->submitForm([], 'Save');
+
+    $this->assertConfigSchemaByName('views.view.test_view');
+    $display_options = $this->config('views.view.test_view')->get('display.page_1.display_options');
+    $this->assertArrayNotHasKey('use_admin_theme', $display_options);
+
+    $this->drupalGet('admin/structure/views/nojs/display/test_view/page_1/use_admin_theme');
+    $this->assertSession()->elementExists('css','input[name="use_admin_theme"][disabled="disabled"][checked="checked"]');
+
+    // Test with a non-administration path.
+    $non_admin_path = 'kittens';
+    $this->drupalGet('admin/structure/views/nojs/display/test_view/page_1/path');
+    $this->submitForm(['path' => $non_admin_path], 'Apply');
+    $this->assertSession()->pageTextContains('/' . $non_admin_path);
+    $this->assertSession()->pageTextContains('Administration theme: No');
+    $this->submitForm([], 'Save');
+
+    $this->assertConfigSchemaByName('views.view.test_view');
+    $display_options = $this->config('views.view.test_view')->get('display.page_1.display_options');
+    $this->assertArrayNotHasKey('use_admin_theme', $display_options);
+
+    // Enable administration theme.
+    $this->drupalGet('admin/structure/views/nojs/display/test_view/page_1/use_admin_theme');
+    $this->submitForm(['use_admin_theme' => TRUE], 'Apply');
+    $this->assertSession()->pageTextContains('Administration theme: Yes');
+    $this->submitForm([], 'Save');
+
+    $this->assertConfigSchemaByName('views.view.test_view');
+    $display_options = $this->config('views.view.test_view')->get('display.page_1.display_options');
+    $this->assertArrayHasKey('use_admin_theme', $display_options);
+    $this->assertTrue($display_options['use_admin_theme']);
+  }
+
 }