Amsterdam has special corona test busses available. One is used alternately at Kraaiennest and Ganzenhoef (At the locations where the markets are normally). There you can get tested without an appointment and for free.
Undocumented people can also get tested. All you need is a phone number and email address to send the results to (can also be the number or email of an acquaintance).
Residents with minor complaints can have themselves tested in the bus for corona without an appointment and free of charge.
More info at: https://www.ggd.amsterdam.nl/nieuwsoverzicht/testen-afspraak-coronatestbus/
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