Update 2021-08-13 (2): According to media reports from Friday (13 August), Norway will lift most of its COVID-19 restrictions once all adults have been offered a vaccine, which is expected to be around the 06 September.
Update 2021-08-13 (1): A list of Norway’s currently open border crossings can be viewed at the link below. It also mentions whether a test station is available at the border crossing.