diff --git a/core/modules/config/src/Tests/ConfigImportUITest.php b/core/modules/config/src/Tests/ConfigImportUITest.php
index 9bc30e3..4f3aea5 100644
--- a/core/modules/config/src/Tests/ConfigImportUITest.php
+++ b/core/modules/config/src/Tests/ConfigImportUITest.php
@@ -68,6 +68,8 @@ function testImport() {
       'label' => 'New',
       'weight' => 0,
       'style' => '',
+      'size' => '',
+      'size_value' => '',
       'protected_property' => '',
     );
     $staging->write($dynamic_name, $original_dynamic_data);
@@ -373,7 +375,9 @@ function testImportErrorLog() {
       'label' => 'Primary',
       'weight' => 0,
       'style' => NULL,
-      'protected_property' => null,
+      'size' => NULL,
+      'size_value' => NULL,
+      'protected_property' => NULL,
     );
     $staging->write($name_primary, $values_primary);
     $values_secondary = array(
@@ -388,7 +392,9 @@ function testImportErrorLog() {
       'label' => 'Secondary Sync',
       'weight' => 0,
       'style' => NULL,
-      'protected_property' => null,
+      'size' => NULL,
+      'size_value' => NULL,
+      'protected_property' => NULL,
     );
     $staging->write($name_secondary, $values_secondary);
     // Verify that there are configuration differences to import.
diff --git a/core/modules/config/src/Tests/ConfigImporterTest.php b/core/modules/config/src/Tests/ConfigImporterTest.php
index 581b5c4..a6b2312 100644
--- a/core/modules/config/src/Tests/ConfigImporterTest.php
+++ b/core/modules/config/src/Tests/ConfigImporterTest.php
@@ -173,6 +173,8 @@ function testNew() {
       'label' => 'New',
       'weight' => 0,
       'style' => '',
+      'size' => '',
+      'size_value' => '',
       'protected_property' => '',
     );
     $staging->write($dynamic_name, $original_dynamic_data);