diff --git a/tests/FailingTest.php b/tests/FailingTest.php
index <HASH>..<HASH> 100644
--- a/tests/FailingTest.php
+++ b/tests/FailingTest.php
@@ -155,6 +155,18 @@ END_OF_SCSS
     transform: scale(1); } }
 END_OF_EXPECTED
             ),
+            array(
+                '#318 - BEM + parent selector @extend', <<<'END_OF_SCSS'
+.foo{
+   &__bar{background:red;}
+}
+input{@extend .foo__bar;}
+END_OF_SCSS
+                , <<<END_OF_EXPECTED
+.foo__bar, input {
+  background: red; }
+END_OF_EXPECTED
+            ),
 /*************************************************************
             array(
                 '', <<<'END_OF_SCSS'
Add failing test for #<I>