diff --git a/tests/phpunit/tests/theme/wpThemeJsonSchema.php b/tests/phpunit/tests/theme/wpThemeJsonSchema.php
index dcd876908cb29..aa6f78eb03439 100644
--- a/tests/phpunit/tests/theme/wpThemeJsonSchema.php
+++ b/tests/phpunit/tests/theme/wpThemeJsonSchema.php
@@ -229,6 +229,20 @@ public function test_migrate_v2_to_latest() {
 						),
 					),
 				),
+				'spacing'    => array(
+					'spacingSizes' => array(
+						array(
+							'name' => 'Small',
+							'slug' => 20,
+							'size' => '20px',
+						),
+						array(
+							'name' => 'Large',
+							'slug' => 80,
+							'size' => '80px',
+						),
+					),
+				),
 			),
 		);
 
@@ -252,6 +266,21 @@ public function test_migrate_v2_to_latest() {
 						),
 					),
 				),
+				'spacing'    => array(
+					'defaultSpacingSizes' => false,
+					'spacingSizes'        => array(
+						array(
+							'name' => 'Small',
+							'slug' => 20,
+							'size' => '20px',
+						),
+						array(
+							'name' => 'Large',
+							'slug' => 80,
+							'size' => '80px',
+						),
+					),
+				),
 			),
 		);