Test #:READTABLE-CASE.CASE-* have names without a home backage
https://gitlab.common-lisp.net/ansi-test/ansi-test/blob/master/reader/readtable-case.lsp#L67-L68
`(deftest ,(make-symbol (concatenate 'string "READTABLE-CASE.CASE-"
(symbol-name reader-case)))
MAKE-SYMBOL
creates a symbol without a home package that is then used as a test name.