diff --git a/dev-ruby/sourcemap/sourcemap-0.1.1-r1.ebuild b/dev-ruby/sourcemap/sourcemap-0.1.1-r1.ebuild
index e26d856d55fb..a42f42ac68c9 100644
--- a/dev-ruby/sourcemap/sourcemap-0.1.1-r1.ebuild
+++ b/dev-ruby/sourcemap/sourcemap-0.1.1-r1.ebuild
@@ -1,8 +1,9 @@
-# Copyright 1999-2025 Gentoo Authors
+# Copyright 1999-2026 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=8
-USE_RUBY="ruby31 ruby32 ruby33 ruby34"
+
+USE_RUBY="ruby32 ruby33 ruby34 ruby40"
 
 RUBY_FAKEGEM_EXTRADOC="README.md"
 
@@ -17,5 +18,7 @@ KEYWORDS="~amd64 ~arm ~arm64 ~ppc ~ppc64 ~riscv ~sparc ~x86"
 
 all_ruby_prepare() {
 	sed -i -e '/bundler/ s:^:#:' Rakefile || die
-	sed -i -e 's/MiniTest/Minitest/' test/test_*.rb || die
+	sed -e 's/MiniTest/Minitest/' \
+		-e '1igem "minitest", "~> 5.0"' \
+		-i test/test_*.rb || die
 }