Clone this repo:
  1. f1d7a67 Apply feedback for RegExp.prototype.flags (#1196) by Leo Balter · 4 hours ago master
  2. 9875641 Add BigInt into the known features list (#1195) by Josh Wolfe · 5 hours ago
  3. d91044c Improve RegExp.prototype.flags coverage (#1149) by Aleksey Shvayka · 5 hours ago
  4. ccaf340 silence the clean command on Travis (#1194) by Leo Balter · 6 hours ago
  5. 8422147 Revert "Tests for NumericSeparatorLiteral. Closes gh-1051" (#1188) by Leo Balter · 2 days ago

Test262 is the official ECMAScript (ECMA-262) conformance suite.

Test262 tests conformance to the continually maintained draft future ECMAScript standard found at , together with any Stage 3 or later TC39 proposals. It is maintained by Tom Care (@tcare) and Leo Balter (@leobalter) with significant contributions from many in the ECMAScript community.

This project is also described by the Ecma Technical Report 104.

Contributing to Test262


  1. Sign the Test262 CLA.
  2. Send a pull request. Please make sure you have one commit per pull request. If you have multiple commits, squash them before sending the pull request.

Running Test262


There are a number of volunteer-maintained projects that may be used to execute Test262 in various ECMAScript hosts: