Mocha.js: Timeouts Cheat Sheet

Suite-level

describe('a suite of tests', function() {
  this.timeout(500);

  it('should take less than 500ms', function(done){
    setTimeout(done, 300);
  });

  it('should take less than 500ms as well', function(done){
    setTimeout(done, 250);
  });
})

Test-level

it('should take less than 500ms', function(done){
  this.timeout(500);
  setTimeout(done, 300);
});

Hook-level

describe('a suite of tests', function() {
  beforeEach(function(done) {
    this.timeout(3000); // A very long environment setup.
    setTimeout(done, 2500);
  });
});