Can't figure out why I'm passing this test? (but it says I am)

I’m doing the Responsive Web Design Projects - Build a Product Landing Page.

User Story #13 requires that “The navbar should always be at the top of the viewport”.

I ran the tests and I passed them all, but it does not seem to me that my navbar is as the top (my logo is above it), and I don’t think I coded anything that would make it fixed to the top. Is my passing of this test an error, or am I missing something?

Here’s my pen:

It is because the page doesn’t have enough content so it doesn’t scroll. If you give the body some height it will fail the test. It is not really an error, more like a false positive.

body {
  height: 1200px;
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