diff --git a/tests/WP_SQLite_Translator_Tests.php b/tests/WP_SQLite_Translator_Tests.php
index 4886aaf..c21478c 100644
--- a/tests/WP_SQLite_Translator_Tests.php
+++ b/tests/WP_SQLite_Translator_Tests.php
@@ -368,7 +368,7 @@ public function testCreateTable() {
 					'Type'    => 'bigint(20) unsigned',
 					'Null'    => 'NO',
 					'Key'     => 'PRI',
-					'Default' => null,
+					'Default' => 'NULL',
 					'Extra'   => '',
 				),
 				(object) array(
@@ -1085,7 +1085,7 @@ public function testNestedTransactionWorkComplexModify() {
 					'Type'    => 'integer',
 					'Null'    => 'NO',
 					'Key'     => 'PRI',
-					'Default' => null,
+					'Default' => 'NULL',
 					'Extra'   => '',
 				),
 				(object) array(