diff --git a/dev-ruby/minitar/minitar-0.12.1.ebuild b/dev-ruby/minitar/minitar-0.12.1.ebuild
index 5fd7160281b9b..87d09cbba78ca 100644
--- a/dev-ruby/minitar/minitar-0.12.1.ebuild
+++ b/dev-ruby/minitar/minitar-0.12.1.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
@@ -35,5 +35,5 @@ all_ruby_prepare() {
 }
 
 each_ruby_test() {
-	${RUBY} -Ilib:test:. -e 'Dir["test/test_*.rb"].each{|f| require f}' || die
+	MT_NO_PLUGINS=true ${RUBY} -Ilib:test:. -e 'Dir["test/test_*.rb"].each{|f| require f}' || die
 }
diff --git a/dev-ruby/minitar/minitar-1.0.2.ebuild b/dev-ruby/minitar/minitar-1.0.2.ebuild
index 2a76c5fb2004f..05b4aab9146da 100644
--- a/dev-ruby/minitar/minitar-1.0.2.ebuild
+++ b/dev-ruby/minitar/minitar-1.0.2.ebuild
@@ -37,5 +37,5 @@ all_ruby_prepare() {
 }
 
 each_ruby_test() {
-	${RUBY} -Ilib:test:. -e 'Dir["test/test_*.rb"].each{|f| require f}' || die
+	MT_NO_PLUGINS=true ${RUBY} -Ilib:test:. -e 'Dir["test/test_*.rb"].each{|f| require f}' || die
 }