diff --git a/core/src/components/datetime/test/custom/index.html b/core/src/components/datetime/test/custom/index.html
index a76f458246..b70046b86e 100644
--- a/core/src/components/datetime/test/custom/index.html
+++ b/core/src/components/datetime/test/custom/index.html
@@ -68,12 +68,12 @@
       }
 
       .custom-grid-wheel::part(wheel-item),
-      ion-picker-column::part(wheel-item) {
+      ion-picker-column-option {
         color: rgb(255, 134, 154);
       }
 
       .custom-grid-wheel::part(wheel-item active),
-      ion-picker-column::part(wheel-item active) {
+      ion-picker-column-option.option-active {
         color: rgb(128, 30, 171);
       }