Oops, try again. Font-family errors



I keep getting the "Oops, try again.
Did you remember to change the first li to the font Arial?" error. I cannot find the error in my code.

<!DOCTYPE html>
		<title>Loving the font changes</title>
		<h1 style="font-family: Arial">Big title</h1>
		 	<li style="font-size: 16px; font-family: Arial">This item is big Arial.</li>
		 	<li style="font-family:verdana; font-size: 12px">This item is medium Verdana.</li>
		 	<li style="font-size: 10px; font-family: impact">This item is small Impact.</li>


I don't see anything wrong, reload the page and try again.


Are proper names that should be capitalized. Otherwise, I don't see an issue.


Turns out my browser had a default font setting, I turned that off and it worked just fine. Thanks @mtf, @mohamadbahaa