diff --git a/core/tests/Drupal/Tests/Core/Config/ConfigFactoryOverrideBaseTest.php b/core/tests/Drupal/Tests/Core/Config/ConfigFactoryOverrideBaseTest.php
index 4d860cd..7386ac9 100644
--- a/core/tests/Drupal/Tests/Core/Config/ConfigFactoryOverrideBaseTest.php
+++ b/core/tests/Drupal/Tests/Core/Config/ConfigFactoryOverrideBaseTest.php
@@ -67,6 +67,13 @@ public function providerTestFilterNestedArray() {
       TRUE,
     ];
 
+    $data['original-scalar-array-override'] = [
+      ['key' => 'value'],
+      ['key' => ['value1', 'value2']],
+      [],
+      TRUE,
+    ];
+
     return $data;
   }