diff --git a/composer.json b/composer.json
index d0eece4..809ed65 100644
--- a/composer.json
+++ b/composer.json
@@ -13,6 +13,9 @@
 		"ext-curl": "*",
 		"rhumsaa/array_column": "~1.1"
 	},
+	"require-dev": {
+		"phpunit/phpunit": "4.6.*@dev"
+	},
 	"autoload": {
 		"psr-0": {
 			"Communibase": "src/"
diff --git a/phpunit.xml b/phpunit.xml
new file mode 100644
index 0000000..e1c53df
--- /dev/null
+++ b/phpunit.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit backupGlobals="false"
+         backupStaticAttributes="false"
+         colors="true"
+         convertErrorsToExceptions="true"
+         convertNoticesToExceptions="true"
+         convertWarningsToExceptions="true"
+         processIsolation="false"
+         stopOnFailure="false"
+         syntaxCheck="false"
+         bootstrap="vendor/autoload.php"
+        >
+    <testsuites>
+        <testsuite name="Test Suite">
+            <directory>./test/</directory>
+        </testsuite>
+    </testsuites>
+</phpunit>
\ No newline at end of file
diff --git a/test/Communibase/FinalizeTest.php b/test/Communibase/FinalizeTest.php
new file mode 100644
index 0000000..b42d0ae
--- /dev/null
+++ b/test/Communibase/FinalizeTest.php
@@ -0,0 +1,26 @@
+<?php
+namespace Communibase;
+
+/**
+ * @package Communibase
+ * @author Kingsquare (source@kingsquare.nl)
+ * @copyright Copyright (c) Kingsquare BV (http://www.kingsquare.nl)
+ */
+class FinalizeTest extends \PHPUnit_Framework_TestCase {
+
+	/**
+	 * @TODO Test schould also check the reversed.
+	 * @expectedException Exception
+	 * @expectedExceptionMessage Cannot call finalize on Person
+	 */
+	public function testFinalizeCallIsPossibleForInvoiceOnly() {
+		$stub = $this->getMockBuilder('Communibase\Connector')
+				->setMethods(null)
+				->disableOriginalConstructor()
+				->getMock();
+
+		// must throw exception
+		$stub->finalize('Person', 'id');
+	}
+
+}