diff --git a/LESS.sublime-syntax b/LESS.sublime-syntax
index c93f3a1..b6b85a3 100644
--- a/LESS.sublime-syntax
+++ b/LESS.sublime-syntax
@@ -212,6 +212,7 @@ contexts:
         - include: string-double
         - include: string-single
         - include: less-variables
+        - include: css-variables
         - include: less-operators
         - include: commas
         - include: terminator
@@ -259,6 +260,7 @@ contexts:
         - include: string-double
         - include: string-single
         - include: less-variables
+        - include: css-variables
         - include: less-operators
         - include: commas
         - include: terminator
diff --git a/syntax_test_less.less b/syntax_test_less.less
index 6d15dd9..a040227 100755
--- a/syntax_test_less.less
+++ b/syntax_test_less.less
@@ -136,6 +136,10 @@ html::before {
   color: @link-color;
   text-decoration: none;
   &:hover {
+    .message-mixin(success; var(--green); var(--green-dark));
+/*                          ^^^ support.function.var.css */
+/*                              ^^ punctuation.definition.custom-property.css*/
+/*                                ^ support.type.custom-property.name.css */
     object-fit: scale-down;
 /*  ^^^^^^^^^^ support.type.property-name.css */
 /*              ^^^^^^^^^^ meta.property-value.css support.constant.property-value.css */