--- grep-3.1/gnulib-tests/test-vc-list-files-git.sh.old	2018-01-03 18:36:29.000000000 -0600
+++ grep-3.1/gnulib-tests/test-vc-list-files-git.sh	2018-06-18 21:57:08.305562148 -0500
@@ -32,6 +32,7 @@
   touch d/a b c &&
   git config user.email "you@example.com" &&
   git config user.name "Your Name" &&
+  git config commit.gpgsign false &&
   git add . > /dev/null &&
   git commit -q -a -m log &&
   printf '%s\n' b c d/a > expected &&