diff --git a/testsuite/css/parser/color.css b/testsuite/css/parser/color.css
index 61c19b77f1..6a25899c7c 100644
--- a/testsuite/css/parser/color.css
+++ b/testsuite/css/parser/color.css
@@ -111,3 +111,15 @@ aa {
 ab {
   color: color(srgb-linear 1 0.5 0 / 50%);
 }
+
+ac {
+  color: oklab(0.8 0 0.3 / 0.5);
+}
+
+ad {
+  color: oklch(0.8 0.3 200 / 0.5);
+}
+
+ae {
+  color: hwb(200 10 90 / 0.5);
+}
diff --git a/testsuite/css/parser/color.ref.css b/testsuite/css/parser/color.ref.css
index 1c3feb436a..71f83b9190 100644
--- a/testsuite/css/parser/color.ref.css
+++ b/testsuite/css/parser/color.ref.css
@@ -111,3 +111,15 @@ aa {
 ab {
   color: color(srgb-linear 1 0.5 0 / 0.5);
 }
+
+ac {
+  color: oklab(0.80000001192092896 0 0.30000001192092896 / 0.5);
+}
+
+ad {
+  color: oklch(0.80000001192092896 0.30000001192092896 200 / 0.5);
+}
+
+ae {
+  color: rgba(26,26,26,0.5);
+}