1 files changed, 8 insertions, 0 deletions
diff --git a/spec/ruby/core/matchdata/captures_spec.rb b/spec/ruby/core/matchdata/captures_spec.rb
index 8c0d2978b7..58d4620709 100644
--- a/spec/ruby/core/matchdata/captures_spec.rb
+++ b/spec/ruby/core/matchdata/captures_spec.rb
@@ -1,7 +1,15 @@
 require_relative '../../spec_helper'
+require_relative 'fixtures/classes'
 
 describe "MatchData#captures" do
   it "returns an array of the match captures" do
     /(.)(.)(\d+)(\d)/.match("THX1138.").captures.should == ["H","X","113","8"]
   end
+
+  ruby_version_is "3.0" do
+    it "returns instances of String when given a String subclass" do
+      str = MatchDataSpecs::MyString.new("THX1138: The Movie")
+      /(.)(.)(\d+)(\d)/.match(str).captures.each { |c| c.should be_an_instance_of(String) }
+    end
+  end
 end