diff -u b/core/modules/views/tests/src/Kernel/Plugin/StyleFieldsTest.php b/core/modules/views/tests/src/Kernel/Plugin/StyleFieldsTest.php
--- b/core/modules/views/tests/src/Kernel/Plugin/StyleFieldsTest.php
+++ b/core/modules/views/tests/src/Kernel/Plugin/StyleFieldsTest.php
@@ -46,7 +46,6 @@
     $view->destroy();
 
     // Check that unsafe separators are stripped.
-    $unsafe_separator = '<script>alert("escape me!")</script>';
     $view->setDisplay();
     $row = $view->display_handler->getOption('row');
     $row['options'] = [
@@ -55,14 +54,15 @@
         'id' => 'id',
         'name' => 'name',
       ],
-      'separator' => $unsafe_separator,
+      'separator' => '<script>alert("escape me!")</script>',
     ];
     $view->display_handler->setOption('row', $row);
     $view->initDisplay();
     $view->initStyle();
     $output = $view->preview();
     $output = $renderer->renderRoot($output);
-    $this->assertNotContains($unsafe_separator, (string) $output);
+    $this->assertNotContains('<script>', (string) $output);
+    $this->assertContains('alert("escape me!")', (string) $output);
   }
 
 }
diff -u b/core/modules/views/views.theme.inc b/core/modules/views/views.theme.inc
--- b/core/modules/views/views.theme.inc
+++ b/core/modules/views/views.theme.inc
@@ -140,7 +140,7 @@
 
       if (!empty($variables['options']['separator']) && $previous_inline && $object->inline && $object->content) {
         $object->separator = [
-          '#markup' => Xss::filterAdmin($variables['options']['separator']),
+          '#markup' => $variables['options']['separator'],
         ];
       }