How to escape curly-brackets in f-strings?

I have a string in which I would like curly-brackets, but also take advantage of the f-strings feature. Is there some syntax that works for this?

Here are two ways it does not work. I would like to include the literal text {bar} as part of the string.

foo = "test"
fstring = f"{foo} {bar}"

NameError: name "bar" is not defined

fstring = f"{foo} {bar}"

SyntaxError: f-string expression part cannot include a backslash

Desired result:

"test {bar}"

Edit: Looks like this question has the same answer as How can I print literal curly-brace characters in a string and also use .format on it?, but you can only know that if you know that str.format uses the same rules as the f-string. So hopefully this question has value in tying f-string searchers to this answer.