diff --git a/js/timers_test.ts b/js/timers_test.ts
index 8d5245f11b..78f6610c48 100644
--- a/js/timers_test.ts
+++ b/js/timers_test.ts
@@ -32,25 +32,21 @@ test(async function timeoutSuccess() {
 });
 
 test(async function timeoutArgs() {
+  const { promise, resolve } = deferred();
   const arg = 1;
-  await new Promise((resolve, reject) => {
-    setTimeout(
-      (a, b, c) => {
-        try {
-          assertEqual(a, arg);
-          assertEqual(b, arg.toString());
-          assertEqual(c, [arg]);
-          resolve();
-        } catch (e) {
-          reject(e);
-        }
-      },
-      10,
-      arg,
-      arg.toString(),
-      [arg]
-    );
-  });
+  setTimeout(
+    (a, b, c) => {
+      assertEqual(a, arg);
+      assertEqual(b, arg.toString());
+      assertEqual(c, [arg]);
+      resolve();
+    },
+    10,
+    arg,
+    arg.toString(),
+    [arg]
+  );
+  await promise;
 });
 
 test(async function timeoutCancelSuccess() {
@@ -151,16 +147,8 @@ test(async function intervalOrdering() {
       clearTimeout(timers[i]);
     }
   }
-  await new Promise((resolve, reject) => {
-    setTimeout(() => {
-      try {
-        assertEqual(timeouts, 1);
-        resolve();
-      } catch (e) {
-        reject(e);
-      }
-    }, 100);
-  });
+  await waitForMs(100);
+  assertEqual(timeouts, 1);
 });
 
 test(async function intervalCancelInvalidSilentFail() {