Hello, I think I found a bug in (srfi srfi-64) module shipped with GNU Guile.
The specification says the following regarding the test-assert: > Though the test-name is a string literal in the examples, it is an > expression. It is evaluated only once. However the test-name is evaluated multiple times: (use-modules (srfi srfi-64)) (test-begin "x") (test-assert (pk "t") #t) Leading to: ;;; ("t") ;;; ("t") Have a nice day Tomas Volf