diff --git a/after/syntax/css/contain-2.vim b/after/syntax/css/contain-2.vim
new file mode 100644
index 0000000..e69de29
diff --git a/test/test.css b/test/test.css
index 221c259..be20608 100644
--- a/test/test.css
+++ b/test/test.css
@@ -145,6 +145,10 @@
   display: size;
 }
 
+.contain-2 {
+  display: auto;
+}
+
 .content-3 {
   string-set: auto;
   bookmark-level: auto;