CSS import fonts from otf

Question

guys, I'm having trouble with importing fonts from an otf file

main.css

@font-face {
    font-family: 'testfont';
    src: url('fonts/test.otf');
}

.fonttest {
    font-family: 'testfont';
}

main.html

<p class="fonttest">TESTtest</p>

But still when I try start the homepage it shows the standard font of html. When I use the inspector on my browser opera and chrome it says that the font was accepted

Answer 1

use this;

@font-face {
    font-family: testfont;
    src: url("fonts/test.otf") format("opentype");
}