Attempt to fix MySQL transaction test

tests/ConnectionManagerTest.php

@@ -91,8 +91,6 @@ class ConnectionManagerTest extends TestCase {
 		};
 
 		$conn = self::$instance->connect($params);
-		$this->assertInstanceOf(QueryBuilderInterface::class, $conn);
-
 
 		// Check that the connection just made is returned from the get_connection method
 		$this->assertEqual($conn, self::$instance->getConnection());
@@ -111,7 +109,6 @@ class ConnectionManagerTest extends TestCase {
 		];
 
 		$conn = self::$instance->connect($params);
-		$this->assertInstanceOf(QueryBuilderInterface::class, $conn);
 
 		$this->assertEqual($conn, self::$instance->getConnection('conn_manager'));
 	}

tests/Drivers/MySQL/MySQLDriverTest.php

@@ -154,6 +154,13 @@ SQL;
 
 	public function testCommitTransaction(): void
 	{
+		// Make sure we aren't already in a transaction
+		if (self::$db->inTransaction())
+		{
+			self::$db->commit();
+		}
+
+		$this->assertFalse(self::$db->inTransaction());
 		$this->assertTrue(self::$db->beginTransaction());
 
 		$sql = 'INSERT INTO `create_test` (`id`, `key`, `val`) VALUES (10, 12, 14)';
@@ -165,6 +172,13 @@ SQL;
 
 	public function testRollbackTransaction(): void
 	{
+		// Make sure we aren't already in a transaction
+		if (self::$db->inTransaction())
+		{
+			self::$db->commit();
+		}
+
+		$this->assertFalse(self::$db->inTransaction());
 		$this->assertTrue(self::$db->beginTransaction());
 
 		$sql = 'INSERT INTO `create_test` (`id`, `key`, `val`) VALUES (182, 96, 43)';