diff --git a/.eslintrc.cjs b/.eslintrc.cjs
index 56cc67455..c4c923004 100644
--- a/.eslintrc.cjs
+++ b/.eslintrc.cjs
@@ -85,7 +85,6 @@ module.exports = {
     'unicorn/no-unreadable-array-destructuring': 'off',
     'unicorn/no-useless-promise-resolve-reject': 'off',
     'unicorn/no-useless-undefined': 'off',
-    'unicorn/numeric-separators-style': 'off',
     'unicorn/prefer-module': 'off',
     'unicorn/prefer-number-properties': 'off',
     'unicorn/prefer-regexp-test': 'off',
diff --git a/src/utils/__tests__/createUniqueId.test.js b/src/utils/__tests__/createUniqueId.test.js
index b2f5fc187..bdeeb89af 100644
--- a/src/utils/__tests__/createUniqueId.test.js
+++ b/src/utils/__tests__/createUniqueId.test.js
@@ -3,7 +3,7 @@ import createUniqueId from '../createUniqueId.js'
 
 describe('createUniqueId', () => {
   it('should be unique', () => {
-    const items = 100000
+    const items = 100_000
     const set = new Set(Array.from(new Array(items)).map(createUniqueId))
 
     assert.equal(set.size, items)
diff --git a/tests/manual/nodejs/subprocess.js b/tests/manual/nodejs/subprocess.js
index 7b6a0277c..662f678d9 100644
--- a/tests/manual/nodejs/subprocess.js
+++ b/tests/manual/nodejs/subprocess.js
@@ -12,4 +12,4 @@ subprocess.stdout.pipe(process.stdout)
 setTimeout(() => {
   console.log('Stopping main process and sending SIGTERM to subprocess...')
   subprocess.kill()
-}, 10000)
+}, 10_000)
diff --git a/tests/runtimes/python/python-big-json/python-big-json.test.js b/tests/runtimes/python/python-big-json/python-big-json.test.js
index 7cc8fcbc1..914fcc9c2 100644
--- a/tests/runtimes/python/python-big-json/python-big-json.test.js
+++ b/tests/runtimes/python/python-big-json/python-big-json.test.js
@@ -25,7 +25,7 @@ describe('Python 3 tests', function desc() {
       expected: Array.from(new Array(1000)).map((_, index) => ({
         a: index,
         b: true,
-        c: 1234567890,
+        c: 1_234_567_890,
         d: 'foo',
       })),
       path: '/dev/hello',