• Install phpunit or have phpunit installed through composer.
• Set the config values:

{
    "phpunit.execPath": "path/to/phpunit", // If this value is set to '' it will try to use the composer phpunit installation.
    "phpunit.args": [
        "--configuration", "./phpunit.xml.dist"
    ],
    "phpunit.envVars": {
        // Here you can define the environment variables to be set before executing phpunit
    },
    "phpunit.excludedGroups": [
        // Groups to be excluded when running the TestSuiteWithExclusions command
    ],
    "phpunit.scriptsAfterTests": {
        "ok": [
            {
            "command": "some-command-with-args",
            "args": ["-status=ok"]
            },
            "another-command-without-args"
        ],
        "error": []
    },
    "phpunit.showOutput": "always" // always, error, ok
}

Run with (Cmd+Shift+P on OSX or Ctrl+Shift+P on Windows and Linux) and execute:

• PHPUnit Test Nearest: This command will search the nearest function from the cursor position until the file's beginning.

• PHPUnit Test Current File: This command will test the current active file.

• PHPUnit Test All Suite: This command will run all the test suite.

• PHPUnit Test All Suite With Exclusions: This command will run the test suite without the excluded groups set in the configuration.

• PHPUnit Test: This command will show a window to pick the test to run.

• PHPUnit Run Last Test: This command will run the last test ran.

• PHPUnit Cancel Current Test: This command will cancel the current running test.

• args is recommended to set in your 'workspace settings'. You can add any phpunit args, check phpunit --help.
• To hook into the debugger (github.com/felixfbecker/vscode-php-debug). Add Key:XDEBUG_CONFIG, Value:idekey=VSCODE to your phpunit.envVars object.