diff --git a/test/test.js b/test/test.js
index b1ba8c7..f8fd4f1 100644
--- a/test/test.js
+++ b/test/test.js
@@ -1,17 +1,23 @@
-const assert = require("assert");
-const path = require("path");
+import assert from "assert";
 
-const { readFile, writeFile } = require("fs").promises;
+import path from "path";
+import { fileURLToPath } from 'url';
+import { dirname } from 'path';
 
-const { getThumbnail } = require("../src/lib");
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = dirname(__filename);
+
+import { readFile, writeFile } from "fs/promises";
+
+import { getThumbnail } from "../src/lib.js";
 
 describe("ProcessFeaturedArticle", function () {
   it("should successfully generate from wikipedia featured article", async function () {
     const data = await readFile("test/Herja.pdf");
-    const jpegBuffer = await getThumbnail(data);
+    const jpegBuffer = await getThumbnail(new Uint8Array(data));
 
     await writeFile(path.join(__dirname, "thumbnail.jpg"), jpegBuffer);
 
-    assert.strictEqual(jpegBuffer.length, 51013);
+    assert.strictEqual(jpegBuffer.length, 51133);
   });
 });