testem.json

{
    "launchers": {
      "unit-node": {
        "exe": "node",
        "args": ["--icu-data-dir=node_modules/full-icu", "tests/runners/unit-node.js"],
        "protocol": "tap"
      },
      "firefox-web-ext-stresstest": {
        "exe": "node",
        "args": ["tests/runners/firefox-web-ext-stresstest.js"],
        "protocol": "tap"
      },
      "firefox-web-ext": {
        "exe": "node",
        "args": ["tests/runners/firefox-web-ext.js"],
        "protocol": "tap"
      },
      "ghostery-headless": {
        "exe": "node",
        "args": ["tests/runners/ghostery-headless.js"],
        "protocol": "tap"
      },
      "chromium-headless": {
        "exe": "node",
        "args": ["tests/runners/chromium-headless.js"],
        "protocol": "tap"
      }
    },
    "browser_args": {
      "chromium": [
        "--no-sandbox"
      ]
    },
    "test_page": "tests/index.mustache"
}