junit-team/junit5 · error · ParameterException

Missing required subcommand

Error message

Missing required subcommand

What it means

Error "Missing required subcommand" thrown in junit-team/junit5.

Source

Thrown at junit-platform-console/src/main/java/org/junit/platform/console/command/MainCommand.java:80

	@Nullable
	CommandResult<?> commandResult;

	MainCommand(ConsoleTestExecutor.Factory consoleTestExecutorFactory) {
		this.consoleTestExecutorFactory = consoleTestExecutorFactory;
	}

	@Override
	public void run() {
		if (helpRequested) {
			commandSpec.commandLine().usage(commandSpec.commandLine().getOut());
			commandResult = CommandResult.success();
		}
		else if (versionRequested) {
			commandSpec.commandLine().printVersionHelp(commandSpec.commandLine().getOut());
			commandResult = CommandResult.success();
		}
		else {
			throw new ParameterException(commandSpec.commandLine(), "Missing required subcommand");
		}
	}

	@Override
	public int getExitCode() {
		return requireNonNull(commandResult).getExitCode();
	}

	CommandResult<?> run(String[] args,
			@SuppressWarnings("OptionalUsedAsFieldOrParameterType") Optional<OutputStreamConfig> outputStreamConfig) {
		CommandLine commandLine = new CommandLine(this) //
				.addSubcommand(new DiscoverTestsCommand(consoleTestExecutorFactory)) //
				.addSubcommand(new ExecuteTestsCommand(consoleTestExecutorFactory)) //
				.addSubcommand(new ListTestEnginesCommand());
		return runCommand(commandLine, args, outputStreamConfig);
	}

	private static CommandResult<?> runCommand(CommandLine commandLine, String[] args,

View on GitHub (pinned to 956246301e)

When it happens

Trigger: Thrown at junit-platform-console/src/main/java/org/junit/platform/console/command/MainCommand.java:80 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of junit-team/junit5@956246301e (2026-08-04). Data as JSON: /data/errors/49ac0219a4ce3639.json. Report an issue: GitHub.