Learn Hardcore Norwegian: Sikkerheten på flyplassen testes hver dag. - The security at the airport is tested every day.

In Norwegian you mark definiteness by adding a suffix. For feminine and masculine nouns you typically add -en (for neuter nouns you add -et). Here sikkerhet (indefinite “security”) becomes sikkerheten (“the security”) because we’re talking about a specific security setup at the airport.

Why do we say på flyplassen instead of something like i flyplassen?

Different locations take different prepositions in Norwegian. You use på with many public places, especially larger areas like an airport, station, or square. So på flyplassen means “at the airport.” I flyplassen would imply “inside the building,” but it isn’t the natural choice here.

What kind of verb form is testes?

That’s the so-called “-s passive.” Many Norwegian verbs form the passive by adding -s to the infinitive: teste → testes (“is tested”). It’s a concise, common way to express that an action happens to the subject without naming who does it.

Could I use blir testet instead of testes?

Yes. Sikkerheten på flyplassen blir testet hver dag is equally correct. This is the “bli-passive” (using bli + past participle), and it’s interchangeable with the -s passive. Choice is mostly stylistic.