* (unintern :test :keyword)
T
* (make-hash-table :test #'equal)

debugger invoked on a UNKNOWN-KEYWORD-ARGUMENT in thread
#<THREAD "main thread" RUNNING {1000518083}>:
  Unknown &KEY argument: :TEST

Type HELP for debugger help, or (SB-EXT:EXIT) to exit from SBCL.

restarts (invokable by number or by possibly-abbreviated name):
  0: [CONTINUE] Ignore all unknown keywords
  1: [ABORT   ] Exit debugger, returning to top level.

(MAKE-HASH-TABLE :TEST #<FUNCTION EQUAL>) [more]