diff --git a/gnu/packages/emacs-xyz.scm b/gnu/packages/emacs-xyz.scm
index f2225a1027..e2d1707744 100644
--- a/gnu/packages/emacs-xyz.scm
+++ b/gnu/packages/emacs-xyz.scm
@@ -9859,7 +9859,7 @@ (define-public emacs-wucuo
         (base32 "03a6jlbv9axrd9yr0xscq3ni7fipm20ppc51kxy0sn241rplv0pg"))))
     (build-system emacs-build-system)
     (arguments
-     `(#:tests? #tn
+     `(#:tests? #t
        #:test-command '("make" "test")
        #:phases (modify-phases %standard-phases
                   ;; Set HOME, otherwise tests fail on loading aspell dict.