Set up PDO constant and configuration
diff --git a/tests/mocks/database/config/pdo/mysql.php b/tests/mocks/database/config/pdo/mysql.php
new file mode 100644
index 0000000..cefb6b0
--- /dev/null
+++ b/tests/mocks/database/config/pdo/mysql.php
@@ -0,0 +1,37 @@
+<?php
+
+return array(
+	
+	// Typical Database configuration
+	'pdo/mysql' => array(
+		'dsn' => '',
+		'hostname' => 'localhost',
+		'username' => 'travis',
+		'password' => '',
+		'database' => 'ci_test',
+		'dbdriver' => 'pdo',
+		'pdodriver' => 'mysql',
+	),
+
+	// Database configuration with failover
+	'pdo/mysql_failover' => array(
+		'dsn' => '',
+		'hostname' => 'localhost',
+		'username' => 'not_travis',
+		'password' => 'wrong password',
+		'database' => 'not_ci_test',
+		'dbdriver' => 'pdo',
+		'pdodriver' => 'mysql',
+		'failover' => array(
+			array(
+				'dsn' => '',
+				'hostname' => 'localhost',
+				'username' => 'travis',
+				'password' => '',
+				'database' => 'ci_test',
+				'dbdriver' => 'pdo',
+				'pdodriver' => 'mysql',
+			),
+		),
+	),
+);
\ No newline at end of file