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-rw-r--r--tests/guix-system.sh4
1 files changed, 2 insertions, 2 deletions
diff --git a/tests/guix-system.sh b/tests/guix-system.sh
index 4bb866adfa..213864833a 100644
--- a/tests/guix-system.sh
+++ b/tests/guix-system.sh
@@ -123,9 +123,9 @@ else
     then
 	# FIXME: With Guile 2.2.0 the error is reported on line 4.
 	# See <http://bugs.gnu.org/26107>.
-	grep "$tmpfile:[49]:[0-9]: GRUB-config.*[Uu]nbound variable" "$errorfile"
+	grep "$tmpfile:[49]:[0-9]\+: GRUB-config.*[Uu]nbound variable" "$errorfile"
     else
-	grep "$tmpfile:9:[0-9]: GRUB-config.*[Uu]nbound variable" "$errorfile"
+	grep "$tmpfile:9:[0-9]\+: GRUB-config.*[Uu]nbound variable" "$errorfile"
     fi
 fi