If function or IF Then function woes

Hello all, first time poster, long time reader.

I have a formula that I am trying to create that is not working. I’ve searched but can’t find the right formula or I’m going about it all wrong.
It references a cell (A1) and return a function in another cell (D1). It goes like this:

If cell A1 is between 1-10 then “test 1” in cell D1,
If A1 is between 11-20 then “test 2” in cell D1,
If A1 is between 21-30, then “test 3” in cell D1

Thank you in advance for any help.

Try setting up a lookup table, in say E2:F4
E2:E4 = 1, 11, 21
F2:F4 = test 1, test 2, test 3

Then use a lookup formula
=LOOKUP(A1,$E$2:$F$4)