Hi Guillaume, I gave it a go and your suggestion indeed cuts it for cleavir and cl-gamepad. It did not fix it for the tests though. I did some more testing, and this is what I found out on one of the failing systems (cl-reexport): from a --pure sbcl repl, if I load the .asd files manually then run test-system, I can reproduce the issue. However, if I run --8<---------------cut here---------------start------------->8--- (asdf:initialize-source-registry `(:source-registry (:tree ,(uiop:getcwd)) :inherit-configuration)) (asdf:test-system :cl-reexport) --8<---------------cut here---------------end--------------->8--- then it works! In other words, I believe that `asdf:load-asd' is yet another under-used ASDF function, and we should probably go with the officially recommended way, namely adding the source folder to the ASDF registry. Thoughts? I'll try it out then send a patch. Cheers!