Features

Ctrl+c stops tests and prints failures
pastable rerun snippet for failures (disabled/integrated on rails 5)
multiple before & after blocks
before :all blocks
around blocks around { |t| Dir.chdir(...) { t.call } }
red-green output (disabled/integrated on rails 5)
mtest executable to run by line number and by folder (disabled/integrated on rails 5)
full backtrace for errors and assertions with verbose (-v)
let!
let_all execute once for all tests in a class and it's subclasses
order_dependent! to make your tests run in given order
Maxitest.static_class_order = true no longer sort tests class/sub-classes in random order
context for more expression
pending { assert false } is skip when it fails, but fails when it passes
implicit subject via require 'maxitest/implicit_subject'
xit to skip test (also does not call setup or teardown)
with_env to change environment variables during test run
capture_stdout and capture_stderr to capture stdout or stderr but not both (like capture_io does)
require 'maxitest/timeout' to make hanging tests fail after Maxitest.timeout seconds
require 'maxitest/threads' fail tests that leave extra threads running
require 'maxitest/global_must' (before autorun) disable deprecation on global must_* or global_expectations gem

Install

gem install maxitest

require "maxitest/autorun"

... normal tests ...

pending "need to fix" do to show why something is pending
pending "need to fix", if: ENV["CI"] do to only skip on CI (if something is supposed to work locally)