testx¶

One command. Any language. Beautiful tests.

testx is a universal test runner that auto-detects your project's language and test framework, runs your tests, and shows clean, unified output. No configuration needed.

testx · Python (pytest)
────────────────────────────────────────────────────────────

  ✓ tests/test_math.py
    ✓ test_add                                         1ms
    ✓ test_subtract                                    0ms
    ✗ test_divide_by_zero                              1ms

────────────────────────────────────────────────────────────
  FAIL  2 passed, 1 failed (3 total) in 120ms

Why testx?¶

Zero config — just run testx in any project
11 languages — Rust, Go, Python, JS/TS, Java, C/C++, Ruby, Elixir, PHP, .NET, Zig
CI-ready — sharding, caching, impact analysis, JUnit/JSON/TAP output
Flaky test detection — stress test mode runs N times and reports pass rates
Fast — smart caching skips re-runs when nothing changed

Quick example¶

# Run tests (auto-detects framework)
testx

# Only test what changed
testx --affected

# Split across 4 CI nodes
testx --partition slice:1/4

# Find flaky tests
testx stress -n 20

# Fuzzy-pick tests to run
testx pick

Getting started¶

See the installation guide to get started.