diff --git a/tests/guix-package.sh b/tests/guix-package.sh
index f9fb31033ecd7215537bceacbd3e53e6d2d5a1a4..1f955257be2bfe03a95cc5411d964e798063eacd 100644
--- a/tests/guix-package.sh
+++ b/tests/guix-package.sh
@@ -189,8 +189,7 @@ emacs_tarball="$module_dir/emacs-42.5.9rc7.tar.gz"
 touch "$emacs_tarball"
 guix package -p "$profile" -i emacs --with-source="$emacs_tarball" -n \
      2> "$tmpfile"
-grep -E 'emacs[[:blank:]]+42\.5\.9rc7[[:blank:]]+.*-emacs-42.5.9rc7' \
-     "$tmpfile"
+grep -E 'emacs[[:blank:]]+42\.5\.9rc7' "$tmpfile"
 rm "$emacs_tarball" "$tmpfile"
 rmdir "$module_dir"
 
diff --git a/tests/ui.scm b/tests/ui.scm
index 05eace67211f7902de75d0f8df7b8ab5face9fd6..3dc6952e1f81ea3a6274b7314be9a2a8125d9fbf 100644
--- a/tests/ui.scm
+++ b/tests/ui.scm
@@ -252,12 +252,12 @@ (define guile-2.0.9
   (let* ((m (manifest (list guile-1.8.8)))
          (t (manifest-transaction (install (list guile-2.0.9)))))
     (with-store store
-      (and (string-match "guile\t1.8.8 → 2.0.9"
+      (and (string-match "guile +1.8.8 → 2.0.9"
                          (with-fluids ((%default-port-encoding "UTF-8"))
                            (with-error-to-string
                             (lambda ()
                               (show-manifest-transaction store m t)))))
-           (string-match "guile\t1.8.8 -> 2.0.9"
+           (string-match "guile +1.8.8 -> 2.0.9"
                          (with-error-to-string
                            (lambda ()
                              ;; In Guile 2.2, %DEFAULT-PORT-ENCODING doesn't