diff --git a/dev-ruby/test-unit/test-unit-3.7.6.ebuild b/dev-ruby/test-unit/test-unit-3.7.6.ebuild
index 90baad0c368ff..477e6c87a942f 100644
--- a/dev-ruby/test-unit/test-unit-3.7.6.ebuild
+++ b/dev-ruby/test-unit/test-unit-3.7.6.ebuild
@@ -3,7 +3,7 @@
 
 EAPI=8
 
-USE_RUBY="ruby32 ruby33 ruby34"
+USE_RUBY="ruby32 ruby33 ruby34 ruby40"
 
 RUBY_FAKEGEM_EXTRADOC="README.md doc-install/text/*.md"