diff --git a/tests/extension/ext/vendor2/bar/migrations/bar.php b/tests/extension/ext/vendor2/bar/migrations/bar.php
new file mode 100644
index 0000000000..ea5ddb6b8b
--- /dev/null
+++ b/tests/extension/ext/vendor2/bar/migrations/bar.php
@@ -0,0 +1,7 @@
+<?php
+
+namespace vendor2\foo\migrations;
+
+class bar
+{
+}
diff --git a/tests/extension/ext/vendor2/bar/migrations/foo.php b/tests/extension/ext/vendor2/bar/migrations/foo.php
new file mode 100644
index 0000000000..d727c2f954
--- /dev/null
+++ b/tests/extension/ext/vendor2/bar/migrations/foo.php
@@ -0,0 +1,54 @@
+<?php
+
+namespace vendor2\foo\migrations;
+
+class foo implements \phpbb\db\migration\migration_interface
+{
+	/**
+	 * {@inheritdoc}
+	 */
+	static public function depends_on()
+	{
+		return array();
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function effectively_installed()
+	{
+		return false;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function update_schema()
+	{
+		return array();
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function revert_schema()
+	{
+		return array();
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function update_data()
+	{
+		return array();
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function revert_data()
+	{
+		return array();
+	}
+}
diff --git a/tests/extension/extension_base_test.php b/tests/extension/extension_base_test.php
index 898c11d902..1e74efc1fa 100644
--- a/tests/extension/extension_base_test.php
+++ b/tests/extension/extension_base_test.php
@@ -11,6 +11,9 @@
 *
 */
 require_once dirname(__FILE__) . '/../../phpBB/includes/functions.php';
+require_once dirname(__FILE__) . '/ext/vendor2/bar/migrations/bar.php';
+require_once dirname(__FILE__) . '/ext/vendor2/bar/migrations/foo.php';
+require_once dirname(__FILE__) . '/ext/vendor2/bar/migrations/migration.php';
 
 class phpbb_extension_extension_base_test extends phpbb_test_case
 {
@@ -61,19 +64,29 @@ class phpbb_extension_extension_base_test extends phpbb_test_case
 		return array(
 			array(
 				'vendor2/bar',
+				false,
 				array(
+					'\vendor2\bar\migrations\bar',
+					'\vendor2\bar\migrations\foo',
 					'\vendor2\bar\migrations\migration',
 				),
 			),
+			array(
+				'vendor2/bar',
+				true,
+				array(
+					2	=> '\vendor2\bar\migrations\migration',
+				),
+			),
 		);
 	}
 
 	/**
 	* @dataProvider data_test_suffix_get_classes
 	*/
-	public function test_suffix_get_classes($extension_name, $expected)
+	public function test_suffix_get_classes($extension_name, $validate_classes, $expected)
 	{
 		$extension = $this->extension_manager->get_extension($extension_name);
-		$this->assertEquals($expected, self::$reflection_method_get_migration_file_list->invoke($extension, false));
+		$this->assertEquals($expected, self::$reflection_method_get_migration_file_list->invoke($extension, $validate_classes));
 	}
 }