diff --git a/web_src/js/utils.test.js b/web_src/js/utils.test.js
index b7691b8d3..c49bb2a11 100644
--- a/web_src/js/utils.test.js
+++ b/web_src/js/utils.test.js
@@ -177,10 +177,6 @@ test('serializeXml', () => {
 });
 
 test('sleep', async () => {
-  // Test 500 ms sleep
-  await testSleep(500);
-
-  // Test 2000 ms sleep
   await testSleep(2000);
 });
 
@@ -189,5 +185,5 @@ async function testSleep(ms) {
   await sleep(ms);
   const endTime = Date.now();    // Record the end time
   const actualSleepTime = endTime - startTime;
-  expect(Math.abs(actualSleepTime - ms) <= 15).toBeTruthy();
+  expect(actualSleepTime >= ms).toBeTruthy();
 }