diff --git a/tests/template/template_test.php b/tests/template/template_test.php
index 111a02ebc6..17fb665eaf 100644
--- a/tests/template/template_test.php
+++ b/tests/template/template_test.php
@@ -367,6 +367,21 @@ class phpbb_template_template_test extends phpbb_template_template_test_case
 				"Value'\n1 O'Clock\nValue\\u0027\n1\\u0020O\\u0027Clock",
 				array('VARIABLE' => "Value'", '1_VARIABLE' => "1 O'Clock"),
 			),
+			array(
+				'lang_twig.html',
+				array(),
+				array(),
+				array(),
+				"VARIABLE\n1_VARIABLE\nVARIABLE\n1_VARIABLE",
+			),
+			array(
+				'lang_twig.html',
+				array(),
+				array(),
+				array(),
+				"Value'\n1 O'Clock\nValue\\u0027\n1\\u0020O\\u0027Clock",
+				array('VARIABLE' => "Value'", '1_VARIABLE' => "1 O'Clock"),
+			),
 			array(
 				'loop_nested_multilevel_ref.html',
 				array(),
diff --git a/tests/template/templates/lang_twig.html b/tests/template/templates/lang_twig.html
new file mode 100644
index 0000000000..bf31012819
--- /dev/null
+++ b/tests/template/templates/lang_twig.html
@@ -0,0 +1,5 @@
+{{ lang('VARIABLE') }}
+{{ lang('1_VARIABLE') }}
+
+{{ lang_js('VARIABLE') }}
+{{ lang_js('1_VARIABLE') }}