diff --git a/tests/dbal/write_test.php b/tests/dbal/write_test.php
index 6e76e08802..f94aebd85b 100644
--- a/tests/dbal/write_test.php
+++ b/tests/dbal/write_test.php
@@ -77,6 +77,13 @@ class phpbb_dbal_write_test extends phpbb_database_test_case
 	{
 		$db = $this->new_dbal();
 
+		$is_myisam = false;
+		if ($db->get_sql_layer() === 'mysqli')
+		{
+			$table_status = $db->get_table_status('phpbb_config');
+			$is_myisam = isset($table_status['Engine']) && $table_status['Engine'] === 'MyISAM';
+		}
+
 		$db->sql_transaction('begin');
 
 		$sql = "DELETE FROM phpbb_config
@@ -92,8 +99,21 @@ class phpbb_dbal_write_test extends phpbb_database_test_case
 		$rows = $db->sql_fetchrowset($result);
 		$db->sql_freeresult($result);
 
-		$this->assertEquals(2, count($rows));
-		$this->assertEquals('config1', $rows[0]['config_name']);
+		if (!$is_myisam)
+		{
+			$this->assertEquals(2, count($rows));
+			$this->assertEquals('config1', $rows[0]['config_name']);
+		}
+		else
+		{
+			// Rollback does not work on MyISAM
+			$this->assertEquals(1, count($rows));
+			$this->assertEquals('config2', $rows[0]['config_name']);
+
+			// Restore deleted config value on MyISAM
+			$sql = "INSERT INTO phpbb_config (config_name, config_value, is_dynamic) VALUES ('config1', 'foo', 0)";
+			$db->sql_query($sql);
+		}
 
 		$db->sql_transaction('begin');