diff --git a/gnu/packages/gnupg.scm b/gnu/packages/gnupg.scm
index a3a42cc2f2..82932489de 100644
--- a/gnu/packages/gnupg.scm
+++ b/gnu/packages/gnupg.scm
@@ -260,6 +260,7 @@ (define-public gnupg
         (add-before 'check 'set-home
           ;; Some tests require write access to $HOME, otherwise leading to
           ;; 'failed to create directory /homeless-shelter/.asy' error.
+          ;; TODO Try removing this phase for GnuPG 2.1.16.
           (lambda _
             (setenv "HOME" "/tmp")
             #t)))))