diff --git a/tests/codeigniter/database/DB_test.php b/tests/codeigniter/database/DB_test.php
index 546d5fa..d5a9369 100644
--- a/tests/codeigniter/database/DB_test.php
+++ b/tests/codeigniter/database/DB_test.php
@@ -2,9 +2,6 @@
 
 class DB_test extends CI_TestCase {
 
-	/**
-	 * @expectedException	InvalidArgumentException
-	 */
 	public function test_db_invalid()
 	{
 		$connection = new Mock_Database_DB(array(
@@ -18,7 +15,7 @@
 			),
 		));
 
-		$this->setExpectedException('InvalidArgumentException', 'CI Error: Invalid DB driver');
+		$this->setExpectedException('RuntimeException', 'CI Error: Invalid DB driver');
 
 		Mock_Database_DB::DB($connection->set_dsn('undefined'), TRUE);
 	}
@@ -37,20 +34,20 @@
 
 	// ------------------------------------------------------------------------
 
+/*
+	This test is unusable, because whoever wrote it apparently thought that
+	an E_WARNING should equal an Exception and based the whole test suite
+	around that bogus assumption.
+
 	public function test_db_failover()
 	{
 		$config = Mock_Database_DB::config(DB_DRIVER);
 		$connection = new Mock_Database_DB($config);
+		$db = Mock_Database_DB::DB($connection->set_dsn(DB_DRIVER.'_failover'), TRUE);
 
-		try
-		{
-			$db = Mock_Database_DB::DB($connection->set_dsn(DB_DRIVER.'_failover'), TRUE);
-		}
-		catch (RuntimeException $e)
-		{
-			$this->assertTrue($db instanceof CI_DB);
-			$this->assertTrue($db instanceof CI_DB_Driver);
-		}
+		$this->assertTrue($db instanceof CI_DB);
+		$this->assertTrue($db instanceof CI_DB_Driver);
 	}
+*/
 
 }
\ No newline at end of file