diff --git a/acct-group/mock/metadata.xml b/acct-group/mock/metadata.xml
new file mode 100644
index 0000000000..b831170d7e
--- /dev/null
+++ b/acct-group/mock/metadata.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+	<maintainer type="person">
+		<email>pastalian46@gmail.com</email>
+		<name>Takuya Wakazono</name>
+	</maintainer>
+</pkgmetadata>
diff --git a/acct-group/mock/mock-0.ebuild b/acct-group/mock/mock-0.ebuild
new file mode 100644
index 0000000000..c62d194eed
--- /dev/null
+++ b/acct-group/mock/mock-0.ebuild
@@ -0,0 +1,8 @@
+# Copyright 2023 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit acct-group
+
+ACCT_GROUP_ID=-1