diff --git a/tests/load/parallel.compose.js b/tests/load/parallel.compose.js
index 6d8e7a1c..91787b57 100644
--- a/tests/load/parallel.compose.js
+++ b/tests/load/parallel.compose.js
@@ -8,22 +8,22 @@ const metasync = require('../..');
 const testCompose = done => {
   let i = 0;
   const p1 = (context, callback) => {
-    setImmediate(() => callback(null, ++i * 2));
+    queueMicrotask(() => callback(null, ++i * 2));
   };
   const p2 = (context, callback) => {
-    setImmediate(() => callback(null, ++i * 3));
+    queueMicrotask(() => callback(null, ++i * 3));
   };
   const p3 = (context, callback) => {
-    setImmediate(() => callback(null, ++i * 5));
+    queueMicrotask(() => callback(null, ++i * 5));
   };
   const p4 = (context, callback) => {
-    setImmediate(() => callback(null, 'key ' + ++i));
+    queueMicrotask(() => callback(null, 'key ' + ++i));
   };
   const p5 = (context, callback) => {
-    setImmediate(() => callback(null, ++i === 5));
+    queueMicrotask(() => callback(null, ++i === 5));
   };
   const p6 = (context, callback) => {
-    setImmediate(() => callback(null, 'key' + ++i * 2));
+    queueMicrotask(() => callback(null, 'key' + ++i * 2));
   };
 
   const f1 = metasync([[p1, p2, p3, p4, p5, p6]]);
diff --git a/tests/load/parallel.promise.js b/tests/load/parallel.promise.js
index 0d8ec77b..e3a6da61 100644
--- a/tests/load/parallel.promise.js
+++ b/tests/load/parallel.promise.js
@@ -7,22 +7,22 @@ const benchmark = require('./benchmark.js');
 const PromiseAll = done => {
   let i = 0;
   const p1 = new Promise(resolve => {
-    setImmediate(() => resolve(++i * 2));
+    resolve(++i * 2);
   });
   const p2 = new Promise(resolve => {
-    setImmediate(() => resolve(++i * 3));
+    resolve(++i * 3);
   });
   const p3 = new Promise(resolve => {
-    setImmediate(() => resolve(++i * 5));
+    resolve(++i * 5);
   });
   const p4 = new Promise(resolve => {
-    setImmediate(() => resolve('key ' + ++i));
+    resolve('key ' + ++i);
   });
   const p5 = new Promise(resolve => {
-    setImmediate(() => resolve(++i === 5));
+    resolve(++i === 5);
   });
   const p6 = new Promise(resolve => {
-    setImmediate(() => resolve('key' + ++i * 2));
+    resolve('key' + ++i * 2);
   });
 
   Promise.all([p1, p2, p3, p4, p5, p6]).then(done.bind(null, null));
diff --git a/tests/load/sequential.compose.js b/tests/load/sequential.compose.js
index 3b7ca9ef..6ed75ce8 100644
--- a/tests/load/sequential.compose.js
+++ b/tests/load/sequential.compose.js
@@ -8,22 +8,22 @@ const metasync = require('../..');
 const composeSequential = done => {
   let i = 0;
   const p1 = (context, callback) => {
-    setImmediate(() => callback(null, ++i * 2));
+    queueMicrotask(() => callback(null, ++i * 2));
   };
   const p2 = (context, callback) => {
-    setImmediate(() => callback(null, ++i * 3));
+    queueMicrotask(() => callback(null, ++i * 3));
   };
   const p3 = (context, callback) => {
-    setImmediate(() => callback(null, ++i * 5));
+    queueMicrotask(() => callback(null, ++i * 5));
   };
   const p4 = (context, callback) => {
-    setImmediate(() => callback(null, 'key ' + ++i));
+    queueMicrotask(() => callback(null, 'key ' + ++i));
   };
   const p5 = (context, callback) => {
-    setImmediate(() => callback(null, ++i === 5));
+    queueMicrotask(() => callback(null, ++i === 5));
   };
   const p6 = (context, callback) => {
-    setImmediate(() => callback(null, 'key' + ++i * 2));
+    queueMicrotask(() => callback(null, 'key' + ++i * 2));
   };
 
   const f1 = metasync([p1, p2, p3, p4, p5, p6]);
diff --git a/tests/load/sequential.promise.js b/tests/load/sequential.promise.js
index cda53c5a..5079346e 100644
--- a/tests/load/sequential.promise.js
+++ b/tests/load/sequential.promise.js
@@ -7,22 +7,22 @@ const benchmark = require('./benchmark.js');
 const PromiseThen = done => {
   let i = 0;
   const p1 = new Promise(resolve => {
-    setImmediate(() => resolve({ p1: ++i * 2 }));
+    resolve(++i * 2);
   });
   const p2 = new Promise(resolve => {
-    setImmediate(() => resolve({ p2: ++i * 3 }));
+    resolve(++i * 3);
   });
   const p3 = new Promise(resolve => {
-    setImmediate(() => resolve({ p3: ++i * 5 }));
+    resolve(++i * 5);
   });
   const p4 = new Promise(resolve => {
-    setImmediate(() => resolve({ p4: 'key ' + ++i }));
+    resolve('key ' + ++i);
   });
   const p5 = new Promise(resolve => {
-    setImmediate(() => resolve({ p5: ++i === 5 }));
+    resolve(++i === 5);
   });
   const p6 = new Promise(resolve => {
-    setImmediate(() => resolve({ p6: 'key' + ++i * 2 }));
+    resolve('key' + ++i * 2);
   });
   Promise.resolve()
     .then(p1)