diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 4a2e065..c790203 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -62,7 +62,7 @@ jobs:
           sbcl --disable-debugger --no-userinit \
                --load "$HOME/quicklisp/setup.lisp" \
                --eval "(mapcar 'asdf:load-asd (directory \"*.asd\"))" \
-               --eval "(format *error-output* "~{~A~%~}" (asdf:registered-systems))" \
+               --eval '(format *error-output* "~{~A~%~}" (asdf:registered-systems))' \
                --eval "(handler-case (asdf:test-system :data-lens) (error (c) (format t \"~a\" c) (uiop:quit 42)))" \
                --eval "(handler-case (asdf:test-system :data-lens/transducers) (error (c) (format t \"~a\" c) (uiop:quit 43)))" \
                --quit