diff --git a/after/syntax/css/conditional-5.vim b/after/syntax/css/conditional-5.vim
index 5f22acd..1a2e61c 100644
--- a/after/syntax/css/conditional-5.vim
+++ b/after/syntax/css/conditional-5.vim
@@ -1 +1,3 @@
+syn keyword cssFontProp contained container-type container-name container
+syn keyword cssFontAttr contained inline-size
 syn match cssFontDescriptor "@\(when\|else\)\>" nextgroup=cssFontDescriptorBlock skipwhite skipnl
diff --git a/test/test.css b/test/test.css
index 5ae1d7e..2adda7c 100644
--- a/test/test.css
+++ b/test/test.css
@@ -198,8 +198,8 @@
 }
 
 @supports (display: auto) or
-(display: auto) not
-(display: auto) {
+	(display: auto) not
+	(display: auto) {
 	.conditional-3 {
 		display: auto;
 	}
@@ -213,7 +213,10 @@
 
 @when media(screen) {
 	.conditional-5 {
-		display: auto;
+		container-type: auto;
+		container-name: auto;
+		container: auto;
+		display: inline-size;
 	}
 } @else {
 	.conditional-5 {