diff --git a/test/unit/toBuffer.js b/test/unit/toBuffer.js
index 3759f524..8c9da6ef 100644
--- a/test/unit/toBuffer.js
+++ b/test/unit/toBuffer.js
@@ -6,22 +6,19 @@ const sharp = require('../../');
 const fixtures = require('../fixtures');
 
 describe('toBuffer', () => {
-  it('reusing same sharp object does not reset previously passed parameters to toBuffer', (done) => {
+  it('reusing same sharp object does not reset previously passed parameters to toBuffer', async () => {
     const image = sharp(fixtures.inputJpg);
-    image.toBuffer({ resolveWithObject: true }).then((obj) => {
-      image.toBuffer().then((buff) => {
-        assert.strictEqual(Buffer.isBuffer(buff), true);
-        assert.strictEqual(typeof obj, 'object');
-        done();
-      });
-    });
+    const obj = await image.toBuffer({ resolveWithObject: true });
+    assert.strictEqual(typeof obj, 'object');
+    assert.strictEqual(typeof obj.info, 'object');
+    assert.strictEqual(Buffer.isBuffer(obj.data), true);
+    const data = await image.toBuffer();
+    assert.strictEqual(Buffer.isBuffer(data), true);
   });
 
-  it('correctly process animated webp with height > 16383', (done) => {
-    const image = sharp(fixtures.inputWebPAnimatedBigHeight, { animated: true });
-    image.toBuffer().then((buff) => {
-      assert.strictEqual(Buffer.isBuffer(buff), true);
-      done();
-    });
+  it('correctly process animated webp with height > 16383', async () => {
+    const data = await sharp(fixtures.inputWebPAnimatedBigHeight, { animated: true })
+      .toBuffer();
+    assert.strictEqual(Buffer.isBuffer(data), true);
   });
 });