diff --git a/tests/template/template_includejs_test.php b/tests/template/template_includejs_test.php
index b644c8b6f0..d4a384a1c5 100644
--- a/tests/template/template_includejs_test.php
+++ b/tests/template/template_includejs_test.php
@@ -84,6 +84,10 @@ class phpbb_template_template_includejs_test extends phpbb_template_template_tes
 				array('TEST' => 16),
 				'<script type="text/javascript" src="http://phpbb.com/b.js?c=d&assets_version=1&assets_version=1#f"></script>',
 			),
+			array(
+				array('TEST' => 17),
+				'<script type="text/javascript" src="//phpbb.com/b.js?assets_version=1"></script>',
+			),
 		);
 	}
 
diff --git a/tests/template/templates/includejs.html b/tests/template/templates/includejs.html
index 030681337b..3bcad76af5 100644
--- a/tests/template/templates/includejs.html
+++ b/tests/template/templates/includejs.html
@@ -32,5 +32,7 @@
 	<!-- INCLUDEJS http://phpbb.com/b.js?c=d#f -->
 <!-- ELSEIF TEST === 16 -->
 	<!-- INCLUDEJS http://phpbb.com/b.js?c=d&assets_version=1#f -->
+<!-- ELSEIF TEST === 17 -->
+	<!-- INCLUDEJS //phpbb.com/b.js -->
 <!-- ENDIF -->
 {$SCRIPTS}