diff --git a/dev-ruby/digest/digest-3.2.0.ebuild b/dev-ruby/digest/digest-3.2.0.ebuild
index 23fece05559af..f31da6b084ad3 100644
--- a/dev-ruby/digest/digest-3.2.0.ebuild
+++ b/dev-ruby/digest/digest-3.2.0.ebuild
@@ -1,4 +1,4 @@
-# Copyright 1999-2024 Gentoo Authors
+# Copyright 1999-2025 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=8
@@ -19,6 +19,9 @@ SRC_URI="https://github.com/ruby/digest/archive/v${PV}.tar.gz -> ${P}.tar.gz"
 LICENSE="BSD-2"
 SLOT="0"
 KEYWORDS="~alpha amd64 arm arm64 ~hppa ~loong ~mips ppc ppc64 ~riscv ~s390 sparc x86 ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~x64-solaris"
+IUSE="test"
+
+ruby_add_depend "test? ( dev-ruby/test-unit dev-ruby/test-unit-ruby-core )"
 
 all_ruby_prepare() {
 	sed -i -e 's/__dir__/"."/' ${RUBY_FAKEGEM_GEMSPEC} || die