--- /dev/null
+<?php
+
+/*
+ * This file is part of the Behat.
+ * (c) Konstantin Kudryashov <ever.zet@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Behat\Testwork\Ordering\Exception;
+
+use Behat\Testwork\Exception\TestworkException;
+use RuntimeException;
+
+/**
+ * Represents exception throw during attempt to prioritise execution with a non-existent algorithm
+ *
+ * @author Ciaran McNulty <mail@ciaranmcnulty.com>
+ */
+final class InvalidOrderException extends RuntimeException implements TestworkException
+{}