intern.json

{
    // Test in Chrome by default.
    "environments": "chrome",

    // Resource properties such as 'suites' must point to the built files
    // rather than the TypeScript sources.
    "suites": "tests/unit/**/*.js",
    "functionalSuites": "tests/functional/**/*.js",
    "coverage": "src/**/*.js",

    "browser": {
        // SystemJS is needed to load the application modules in the browser
        "loader": "systemjs",

        // The application's SystemJS config is loaded here as it's necessary
        // when loading individual application modules. The 'useLoader' flag
        // indicates that the file should be loaded using the SystemJS loader.
        "plugins": { "script": "src/config.js", "useLoader": true }
    },

    // Convenience configs for using various browsers
    "configs": {
        "firefox": {
            "environments": "firefox",
            "tunnelOptions": {
                "drivers": ["firefox"]
            }
        },
        "ie": {
            "environments": "internet explorer",
            "tunnelOptions": {
                "drivers": ["ie"]
            }
        },
        "edge": {
            "environments": "MicrosoftEdge",
            "tunnelOptions": {
                "drivers": ["edge"]
            }
        },
        "safari": {
            "environments": {
                "browser": "safari",
                // This disables Intern's browser feature detection, which can
                // make Safari 11 unresponsive.
                "fixSessionCapabilities": "no-detect"
            }
        }
    }
}