diff --git a/testsuite/css/parser/color-mix.css b/testsuite/css/parser/color-mix.css
index 79dba1ddbd..29b17651a6 100644
--- a/testsuite/css/parser/color-mix.css
+++ b/testsuite/css/parser/color-mix.css
@@ -51,11 +51,11 @@ m {
 }
 
 n {
-  color: color-mix(in oklch shorter hue, red, blue);
+  color: color-mix(in oklch shorter hue, oklch(1 0 0), oklch(0 1 0));
 }
 
 o {
-  color: color-mix(in oklab, red, blue);
+  color: color-mix(in oklab, oklab(1 0 0), oklab(0 1 0));
 }
 
 p {
diff --git a/testsuite/css/parser/color-mix.ref.css b/testsuite/css/parser/color-mix.ref.css
index d17ff80b87..dd93325d46 100644
--- a/testsuite/css/parser/color-mix.ref.css
+++ b/testsuite/css/parser/color-mix.ref.css
@@ -51,11 +51,11 @@ m {
 }
 
 n {
-  color: oklch(0.539985 0.285449 326.643);
+  color: oklch(0.5 0.5 0);
 }
 
 o {
-  color: oklab(0.539985 0.096203 -0.0928409);
+  color: oklab(0.5 0.5 0);
 }
 
 v {