diff --git a/t/lib-gpg.sh b/t/lib-gpg.sh
index fd499e7c49..cd2baef383 100755
--- a/t/lib-gpg.sh
+++ b/t/lib-gpg.sh
@@ -18,6 +18,7 @@ else
 		# No password given, to enable non-interactive operation.
 		cp -R "$TEST_DIRECTORY"/lib-gpg ./gpghome
 		chmod 0700 gpghome
+		chmod 0600 gpghome/*
 		GNUPGHOME="$(pwd)/gpghome"
 		export GNUPGHOME
 		test_set_prereq GPG