diff --git a/after/syntax/css/grid-3.vim b/after/syntax/css/grid-3.vim
new file mode 100644
index 0000000..1eba909
--- /dev/null
+++ b/after/syntax/css/grid-3.vim
@@ -0,0 +1,2 @@
+syn keyword cssFontProp contained masonry-direction masonry-fill masonry-flow masonry masonry-template-tracks masonry-template-areas masonry-auto-tracks masonry-track-start masonry-track-end masonry-track masonry-slack
+syn keyword cssFontAttr contained masonry inline-masonry
diff --git a/test/test.css b/test/test.css
index 1444a4e..7aa22f5 100644
--- a/test/test.css
+++ b/test/test.css
@@ -509,6 +509,22 @@
 	display: auto;
 }
 
+.grid-3 {
+	masonry-direction: auto;
+	masonry-fill: auto;
+	masonry-flow: auto;
+	masonry: auto;
+	masonry-template-tracks: auto;
+	masonry-template-areas: auto;
+	masonry-auto-tracks: auto;
+	masonry-track-start: auto;
+	masonry-track-end: auto;
+	masonry-track: auto;
+	masonry-slack: auto;
+	display: masonry;
+	display: inline-masonry;
+}
+
 .highlight-api-1::highlight(test) {
 	display: auto;
 }