Use unicode characters CCL is happy with
    
        | author | Steve Losh <steve@stevelosh.com> | 
    
        | date | Mon, 10 Aug 2020 23:15:25 -0400 | 
    
    
        | parents | 4c59ba2362d8 | 
    
        | children | 88008e9aeac3 | 
    
        | branches/tags | (none) | 
    
        | files | test/tests.lisp | 
Changes
    
--- a/test/tests.lisp	Mon Aug 10 22:54:14 2020 -0400
+++ b/test/tests.lisp	Mon Aug 10 23:15:25 2020 -0400
@@ -94,7 +94,7 @@
   ((format nil "foo~Abar" #\tab) "'foo\\tbar'")
   ((format nil "u: ~A" (code-char #x1234)) "'u: \\u1234'")
   ((format nil "(~A)" (code-char #xCAFE)) "'(\\uCaFe)'")
-  ((format nil "~A~A" (code-char #xDEAD) (code-char #xBEEF)) "'\\uDEAD\\ubeef'"))
+  ((format nil "~A~A" (code-char #xABCD) (code-char #xBEEF)) "'\\uABCD\\ubeef'"))
 
 (define-basic-tests vectors
   (#() "[]")