diff --git a/test/unit/fetch_stream_spec.js b/test/unit/fetch_stream_spec.js
index d819b2c6d..2ff1b41ec 100644
--- a/test/unit/fetch_stream_spec.js
+++ b/test/unit/fetch_stream_spec.js
@@ -20,7 +20,7 @@ describe("fetch_stream", function () {
   const pdfUrl = new URL("../pdfs/tracemonkey.pdf", window.location).href;
   const pdfLength = 1016315;
 
-  it("read with streaming", function (done) {
+  it("read with streaming", async function () {
     const stream = new PDFFetchStream({
       url: pdfUrl,
       disableStream: false,
@@ -47,18 +47,14 @@ describe("fetch_stream", function () {
       });
     };
 
-    const readPromise = Promise.all([read(), promise]);
-    readPromise
-      .then(function () {
-        expect(len).toEqual(pdfLength);
-        expect(isStreamingSupported).toEqual(true);
-        expect(isRangeSupported).toEqual(false);
-        done();
-      })
-      .catch(done.fail);
+    await Promise.all([read(), promise]);
+
+    expect(len).toEqual(pdfLength);
+    expect(isStreamingSupported).toEqual(true);
+    expect(isRangeSupported).toEqual(false);
   });
 
-  it("read ranges with streaming", function (done) {
+  it("read ranges with streaming", async function () {
     const rangeSize = 32768;
     const stream = new PDFFetchStream({
       url: pdfUrl,
@@ -98,20 +94,16 @@ describe("fetch_stream", function () {
       });
     };
 
-    const readPromise = Promise.all([
+    await Promise.all([
       read(rangeReader1, result1),
       read(rangeReader2, result2),
       promise,
     ]);
-    readPromise
-      .then(function () {
-        expect(isStreamingSupported).toEqual(true);
-        expect(isRangeSupported).toEqual(true);
-        expect(fullReaderCancelled).toEqual(true);
-        expect(result1.value).toEqual(rangeSize);
-        expect(result2.value).toEqual(tailSize);
-        done();
-      })
-      .catch(done.fail);
+
+    expect(isStreamingSupported).toEqual(true);
+    expect(isRangeSupported).toEqual(true);
+    expect(fullReaderCancelled).toEqual(true);
+    expect(result1.value).toEqual(rangeSize);
+    expect(result2.value).toEqual(tailSize);
   });
 });