diff --git a/tests/guix-build-branch.sh b/tests/guix-build-branch.sh
index 2556a0cdb9..c5b07e07c6 100644
--- a/tests/guix-build-branch.sh
+++ b/tests/guix-build-branch.sh
@@ -1,5 +1,5 @@
 # GNU Guix --- Functional package management for GNU
-# Copyright © 2018, 2019 Ludovic Courtès <ludo@gnu.org>
+# Copyright © 2018, 2019, 2020 Ludovic Courtès <ludo@gnu.org>
 #
 # This file is part of GNU Guix.
 #
@@ -54,7 +54,7 @@ test "$v0_1_0_drv" != "$orig_drv"
 
 v0_1_0_drv="`guix build guix --with-commit=guile-gcrypt=v0.1.0 -d`"
 guix gc -R "$v0_1_0_drv" | grep guile-gcrypt-0.1.0
-guix gc -R "$v0_1_0_drv" | grep guile-gcrypt-9e3eacd
+guix gc -R "$v0_1_0_drv" | grep guile-gcrypt-8fe64e8 # this is the tag ID
 test "$v0_1_0_drv" != "$latest_drv"
 test "$v0_1_0_drv" != "$orig_drv"