diff --git a/after/syntax/css/css3-cascade.vim b/after/syntax/css/css3-cascade.vim
new file mode 100644
index 0000000..1f05773
--- /dev/null
+++ b/after/syntax/css/css3-cascade.vim
@@ -0,0 +1,2 @@
+" TODO: create cssCascadeProp
+syn keyword cssFontProp all
diff --git a/test/test.css b/test/test.css
index ec40e0f..1106061 100644
--- a/test/test.css
+++ b/test/test.css
@@ -59,6 +59,10 @@
   break-inside: auto;
 }
 
+.cascade {
+  all: default;
+}
+
 .colors {
   opacity: rgba(0, 0, 0, 1);
   display: hsla(0, 0, 0, 1)