The most common way to use t.throws is to match against the error message. However, sometimes part of the error message varies by Node.js versions or operating systems. Currently, you would use regex matching for this. But with regex, you have to be careful to escape special symbols.

I suggest adding support for a function as the message. This would make it easy to:

• Check is a message contains a certain string
• Check if the error message is one of multiple messages

Examples:

await t.throwsAsync(async () => {
	throw new TypeError('🦄');
}, {
	message: message => ['🦄', '🐴'].includes(message)
});

await t.throwsAsync(async () => {
	throw new TypeError(`${process.platform} is not supported`);
}, {
	message: message => message.includes('is not supported')
});