diff --git a/tests/end-to-end.test.js b/tests/end-to-end.test.js
index 0f51365..3f25032 100644
--- a/tests/end-to-end.test.js
+++ b/tests/end-to-end.test.js
@@ -1,46 +1,38 @@
-import test from 'ava';
-import fs from 'fs';
-
-test.before((t) => {
-  const { exec } = require('child_process');
-  exec('gulp', (err, stdout, stderr) => {
-    if (err) {
-      console.error('Failed to run gulp', err);
-    }
-  });
-});
+const test = require('ava');
+const fs = require('fs');
+const path = require('path');
 
 test('dark signature output', async (t) => {
-  const expected = fs.readFileSync('./tests/sample/dark/signature-dark.html');
-  const built = fs.readFileSync('./dist/dark/signature-dark.html');
+  const expected = fs.readFileSync(path.resolve('tests/sample/dark/signature-dark.html'));
+  const built = fs.readFileSync(path.resolve('dist/dark/signature-dark.html'));
 
   t.deepEqual(expected, built);
 });
 
 test('dark signature reply output', async (t) => {
-  const expected = fs.readFileSync('./tests/sample/dark/signature-reply-dark.html');
-  const built = fs.readFileSync('./dist/dark/signature-reply-dark.html');
+  const expected = fs.readFileSync(path.resolve('tests/sample/dark/signature-reply-dark.html'));
+  const built = fs.readFileSync(path.resolve('dist/dark/signature-reply-dark.html'));
 
   t.deepEqual(expected, built);
 });
 
 test('light signature output', async (t) => {
-  const expected = fs.readFileSync('./tests/sample/light/signature-light.html');
-  const built = fs.readFileSync('./dist/light/signature-light.html');
+  const expected = fs.readFileSync(path.resolve('tests/sample/light/signature-light.html'));
+  const built = fs.readFileSync(path.resolve('dist/light/signature-light.html'));
 
   t.deepEqual(expected, built);
 });
 
 test('light signature reply output', async (t) => {
-  const expected = fs.readFileSync('./tests/sample/light/signature-reply-light.html');
-  const built = fs.readFileSync('./dist/light/signature-reply-light.html');
+  const expected = fs.readFileSync(path.resolve('tests/sample/light/signature-reply-light.html'));
+  const built = fs.readFileSync(path.resolve('dist/light/signature-reply-light.html'));
 
   t.deepEqual(expected, built);
 });
 
 test('light full mail output', async (t) => {
-  const expected = fs.readFileSync('./tests/sample/light/full-mail-light.html');
-  const built = fs.readFileSync('./dist/light/full-mail-light.html');
+  const expected = fs.readFileSync(path.resolve('tests/sample/light/full-mail-light.html'));
+  const built = fs.readFileSync(path.resolve('dist/light/full-mail-light.html'));
 
   t.deepEqual(expected, built);
 });