diff --git a/ui2abc/ets-tests/ets/utils.ets b/ui2abc/ets-tests/ets/utils.ets
index 09ac4c5ba0b88907ce1583fb9376eb0a5dc9f24e..9b90c3103c7fff97c6c314107375771d3943e737 100644
--- a/ui2abc/ets-tests/ets/utils.ets
+++ b/ui2abc/ets-tests/ets/utils.ets
@@ -37,8 +37,8 @@ export function testPageOnLoad(
     assert.equal(result, expectedStr, message || page + " is not properly updated")
 }
 
-function sleep(ms: int32): Promise<NullishType> {
-    return new Promise<NullishType>((resolve: (value: NullishType) => void) => {
+function sleep(ms: int32): Promise<Any> {
+    return new Promise<Any>((resolve: (value: Any) => void) => {
         setTimeout(() => {
             resolve(undefined);
         }, ms)