diff --git a/test/integration/accessibility_spec.mjs b/test/integration/accessibility_spec.mjs
index 4dde9779b..9ed7eda50 100644
--- a/test/integration/accessibility_spec.mjs
+++ b/test/integration/accessibility_spec.mjs
@@ -13,7 +13,7 @@
  * limitations under the License.
  */
 
-const { closePages, loadAndWait } = require("./test_utils.js");
+import { closePages, loadAndWait } from "./test_utils.mjs";
 
 describe("accessibility", () => {
   describe("structure tree", () => {
diff --git a/test/integration/annotation_spec.mjs b/test/integration/annotation_spec.mjs
index 06e5562ce..7c35b1e6e 100644
--- a/test/integration/annotation_spec.mjs
+++ b/test/integration/annotation_spec.mjs
@@ -13,12 +13,12 @@
  * limitations under the License.
  */
 
-const {
+import {
   closePages,
-  getSelector,
   getQuerySelector,
+  getSelector,
   loadAndWait,
-} = require("./test_utils.js");
+} from "./test_utils.mjs";
 
 describe("Annotation highlight", () => {
   describe("annotation-highlight.pdf", () => {
diff --git a/test/integration/copy_paste_spec.mjs b/test/integration/copy_paste_spec.mjs
index 721cfe585..e8fc78347 100644
--- a/test/integration/copy_paste_spec.mjs
+++ b/test/integration/copy_paste_spec.mjs
@@ -13,13 +13,13 @@
  * limitations under the License.
  */
 
-const {
+import {
   closePages,
   loadAndWait,
   mockClipboard,
   waitForEvent,
   waitForTextLayer,
-} = require("./test_utils.js");
+} from "./test_utils.mjs";
 
 const selectAll = async page => {
   const promise = waitForEvent(page, "selectionchange");
diff --git a/test/integration/find_spec.mjs b/test/integration/find_spec.mjs
index c5c0e29fb..c761094f0 100644
--- a/test/integration/find_spec.mjs
+++ b/test/integration/find_spec.mjs
@@ -13,7 +13,7 @@
  * limitations under the License.
  */
 
-const { closePages, loadAndWait } = require("./test_utils.js");
+import { closePages, loadAndWait } from "./test_utils.mjs";
 
 function fuzzyMatch(a, b, browserName, pixelFuzz = 3) {
   expect(a)
diff --git a/test/integration/freetext_editor_spec.mjs b/test/integration/freetext_editor_spec.mjs
index 7a2889b76..5d6da3fce 100644
--- a/test/integration/freetext_editor_spec.mjs
+++ b/test/integration/freetext_editor_spec.mjs
@@ -13,24 +13,23 @@
  * limitations under the License.
  */
 
-const {
+import {
   closePages,
   dragAndDropAnnotation,
   getEditors,
   getEditorSelector,
-  getSelectedEditors,
   getFirstSerialized,
+  getSelectedEditors,
   getSerialized,
   loadAndWait,
   scrollIntoView,
   waitForEvent,
   waitForSelectedEditor,
-  waitForUnselectedEditor,
   waitForSerialized,
   waitForStorageEntries,
-} = require("./test_utils.js");
-
-const PNG = require("pngjs").PNG;
+  waitForUnselectedEditor,
+} from "./test_utils.mjs";
+import { PNG } from "pngjs";
 
 const copyPaste = async page => {
   let promise = waitForEvent(page, "copy");
diff --git a/test/integration/ink_editor_spec.mjs b/test/integration/ink_editor_spec.mjs
index 890a04f97..7ab235ea9 100644
--- a/test/integration/ink_editor_spec.mjs
+++ b/test/integration/ink_editor_spec.mjs
@@ -13,12 +13,12 @@
  * limitations under the License.
  */
 
-const {
+import {
   closePages,
   getSelectedEditors,
   loadAndWait,
   waitForStorageEntries,
-} = require("./test_utils.js");
+} from "./test_utils.mjs";
 
 const waitForPointerUp = page =>
   page.evaluate(
diff --git a/test/integration/scripting_spec.mjs b/test/integration/scripting_spec.mjs
index 4117249ed..0a714f994 100644
--- a/test/integration/scripting_spec.mjs
+++ b/test/integration/scripting_spec.mjs
@@ -13,16 +13,16 @@
  * limitations under the License.
  */
 
-const {
+import {
   clearInput,
   closePages,
-  getSelector,
-  getQuerySelector,
   getComputedStyleSelector,
-  loadAndWait,
   getFirstSerialized,
+  getQuerySelector,
+  getSelector,
+  loadAndWait,
   scrollIntoView,
-} = require("./test_utils.js");
+} from "./test_utils.mjs";
 
 describe("Interaction", () => {
   async function actAndWaitForInput(page, selector, action, clear = true) {
diff --git a/test/integration/stamp_editor_spec.mjs b/test/integration/stamp_editor_spec.mjs
index e57677d3c..4d88abc93 100644
--- a/test/integration/stamp_editor_spec.mjs
+++ b/test/integration/stamp_editor_spec.mjs
@@ -13,7 +13,7 @@
  * limitations under the License.
  */
 
-const {
+import {
   closePages,
   getEditorDimensions,
   getEditorSelector,
@@ -21,11 +21,14 @@ const {
   loadAndWait,
   serializeBitmapDimensions,
   waitForAnnotationEditorLayer,
-  waitForStorageEntries,
   waitForSelectedEditor,
-} = require("./test_utils.js");
-const path = require("path");
-const fs = require("fs");
+  waitForStorageEntries,
+} from "./test_utils.mjs";
+import { fileURLToPath } from "url";
+import fs from "fs";
+import path from "path";
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
 
 const selectAll = async page => {
   await page.keyboard.down("Control");
diff --git a/test/integration/test_utils.mjs b/test/integration/test_utils.mjs
index bc79c60d0..b71e75049 100644
--- a/test/integration/test_utils.mjs
+++ b/test/integration/test_utils.mjs
@@ -13,8 +13,8 @@
  * limitations under the License.
  */
 
-exports.loadAndWait = (filename, selector, zoom, pageSetup) =>
-  Promise.all(
+function loadAndWait(filename, selector, zoom, pageSetup) {
+  return Promise.all(
     global.integrationSessions.map(async session => {
       const page = await session.browser.newPage();
 
@@ -49,40 +49,42 @@ exports.loadAndWait = (filename, selector, zoom, pageSetup) =>
       return [session.name, page];
     })
   );
+}
 
-exports.closePages = pages =>
-  Promise.all(
+function closePages(pages) {
+  return Promise.all(
     pages.map(async ([_, page]) => {
       // Avoid to keep something from a previous test.
       await page.evaluate(() => window.localStorage.clear());
       await page.close();
     })
   );
+}
 
-exports.clearInput = async (page, selector) => {
+async function clearInput(page, selector) {
   await page.click(selector);
   await page.keyboard.down("Control");
   await page.keyboard.press("A");
   await page.keyboard.up("Control");
   await page.keyboard.press("Backspace");
   await page.waitForTimeout(10);
-};
+}
 
 function getSelector(id) {
   return `[data-element-id="${id}"]`;
 }
-exports.getSelector = getSelector;
 
 function getQuerySelector(id) {
   return `document.querySelector('${getSelector(id)}')`;
 }
-exports.getQuerySelector = getQuerySelector;
 
 function getComputedStyleSelector(id) {
   return `getComputedStyle(${getQuerySelector(id)})`;
 }
-exports.getComputedStyleSelector = getComputedStyleSelector;
-exports.getEditorSelector = n => `#pdfjs_internal_editor_${n}`;
+
+function getEditorSelector(n) {
+  return `#pdfjs_internal_editor_${n}`;
+}
 
 function getSelectedEditors(page) {
   return page.evaluate(() => {
@@ -95,7 +97,6 @@ function getSelectedEditors(page) {
     return results;
   });
 }
-exports.getSelectedEditors = getSelectedEditors;
 
 async function waitForEvent(page, eventName, timeout = 5000) {
   const hasTimedout = await Promise.race([
@@ -119,40 +120,35 @@ async function waitForEvent(page, eventName, timeout = 5000) {
     console.log(`waitForEvent: timeout waiting for ${eventName}`);
   }
 }
-exports.waitForEvent = waitForEvent;
 
-const waitForStorageEntries = async (page, nEntries) => {
-  await page.waitForFunction(
+async function waitForStorageEntries(page, nEntries) {
+  return page.waitForFunction(
     n => window.PDFViewerApplication.pdfDocument.annotationStorage.size === n,
     {},
     nEntries
   );
-};
-exports.waitForStorageEntries = waitForStorageEntries;
+}
 
-const waitForSerialized = async (page, nEntries) => {
-  await page.waitForFunction(
+async function waitForSerialized(page, nEntries) {
+  return page.waitForFunction(
     n =>
       (window.PDFViewerApplication.pdfDocument.annotationStorage.serializable
         .map?.size ?? 0) === n,
     {},
     nEntries
   );
-};
-exports.waitForSerialized = waitForSerialized;
+}
 
-const waitForSelectedEditor = async (page, selector) => {
-  await page.waitForSelector(`${selector}.selectedEditor`);
-};
-exports.waitForSelectedEditor = waitForSelectedEditor;
+async function waitForSelectedEditor(page, selector) {
+  return page.waitForSelector(`${selector}.selectedEditor`);
+}
 
-const waitForUnselectedEditor = async (page, selector) => {
-  await page.waitForSelector(`${selector}:not(.selectedEditor)`);
-};
-exports.waitForUnselectedEditor = waitForUnselectedEditor;
+async function waitForUnselectedEditor(page, selector) {
+  return page.waitForSelector(`${selector}:not(.selectedEditor)`);
+}
 
-const mockClipboard = async pages => {
-  await Promise.all(
+async function mockClipboard(pages) {
+  return Promise.all(
     pages.map(async ([_, page]) => {
       await page.evaluate(() => {
         let data = null;
@@ -164,8 +160,7 @@ const mockClipboard = async pages => {
       });
     })
   );
-};
-exports.mockClipboard = mockClipboard;
+}
 
 async function getSerialized(page, filter = undefined) {
   const values = await page.evaluate(() => {
@@ -175,11 +170,10 @@ async function getSerialized(page, filter = undefined) {
   });
   return filter ? values.map(filter) : values;
 }
-exports.getSerialized = getSerialized;
 
-const getFirstSerialized = async (page, filter = undefined) =>
-  (await getSerialized(page, filter))[0];
-exports.getFirstSerialized = getFirstSerialized;
+async function getFirstSerialized(page, filter = undefined) {
+  return (await getSerialized(page, filter))[0];
+}
 
 function getEditors(page, kind) {
   return page.evaluate(aKind => {
@@ -191,7 +185,6 @@ function getEditors(page, kind) {
     return results;
   }, kind);
 }
-exports.getEditors = getEditors;
 
 function getEditorDimensions(page, id) {
   return page.evaluate(n => {
@@ -205,7 +198,6 @@ function getEditorDimensions(page, id) {
     };
   }, id);
 }
-exports.getEditorDimensions = getEditorDimensions;
 
 async function serializeBitmapDimensions(page) {
   await page.waitForFunction(() => {
@@ -229,7 +221,6 @@ async function serializeBitmapDimensions(page) {
       : [];
   });
 }
-exports.serializeBitmapDimensions = serializeBitmapDimensions;
 
 async function dragAndDropAnnotation(page, startX, startY, tX, tY) {
   await page.mouse.move(startX, startY);
@@ -239,7 +230,6 @@ async function dragAndDropAnnotation(page, startX, startY, tX, tY) {
   await page.mouse.up();
   await page.waitForSelector("#viewer:not(.noUserSelect)");
 }
-exports.dragAndDropAnnotation = dragAndDropAnnotation;
 
 async function waitForAnnotationEditorLayer(page) {
   return page.evaluate(() => {
@@ -251,7 +241,6 @@ async function waitForAnnotationEditorLayer(page) {
     });
   });
 }
-exports.waitForAnnotationEditorLayer = waitForAnnotationEditorLayer;
 
 async function waitForTextLayer(page) {
   return page.evaluate(() => {
@@ -260,7 +249,6 @@ async function waitForTextLayer(page) {
     });
   });
 }
-exports.waitForTextLayer = waitForTextLayer;
 
 async function scrollIntoView(page, selector) {
   const promise = page.evaluate(
@@ -296,4 +284,29 @@ async function scrollIntoView(page, selector) {
     selector
   );
 }
-exports.scrollIntoView = scrollIntoView;
+
+export {
+  clearInput,
+  closePages,
+  dragAndDropAnnotation,
+  getComputedStyleSelector,
+  getEditorDimensions,
+  getEditors,
+  getEditorSelector,
+  getFirstSerialized,
+  getQuerySelector,
+  getSelectedEditors,
+  getSelector,
+  getSerialized,
+  loadAndWait,
+  mockClipboard,
+  scrollIntoView,
+  serializeBitmapDimensions,
+  waitForAnnotationEditorLayer,
+  waitForEvent,
+  waitForSelectedEditor,
+  waitForSerialized,
+  waitForStorageEntries,
+  waitForTextLayer,
+  waitForUnselectedEditor,
+};