2 files changed, 11 insertions, 1 deletions
diff --git a/spec/ruby/core/string/start_with_spec.rb b/spec/ruby/core/string/start_with_spec.rb
index 81eed47f96..35e33b46a6 100644
--- a/spec/ruby/core/string/start_with_spec.rb
+++ b/spec/ruby/core/string/start_with_spec.rb
@@ -11,7 +11,14 @@ describe "String#start_with?" do
     "\xA9".should.start_with?("\xA9") # A9 is not a character head for UTF-8
   end
 
-  ruby_bug "#19784", ""..."3.3" do
+  ruby_version_is ""..."3.3" do
+    it "does not check we are matching only part of a character" do
+      "\xe3\x81\x82".size.should == 1
+      "\xe3\x81\x82".should.start_with?("\xe3")
+    end
+  end
+
+  ruby_version_is "3.3" do # #19784
     it "checks we are matching only part of a character" do
       "\xe3\x81\x82".size.should == 1
       "\xe3\x81\x82".should_not.start_with?("\xe3")
diff --git a/spec/ruby/core/string/uplus_spec.rb b/spec/ruby/core/string/uplus_spec.rb
index 038b283c90..65b66260dd 100644
--- a/spec/ruby/core/string/uplus_spec.rb
+++ b/spec/ruby/core/string/uplus_spec.rb
@@ -7,6 +7,9 @@ describe 'String#+@' do
 
     output.should_not.frozen?
     output.should == 'foo'
+
+    output << 'bar'
+    output.should == 'foobar'
   end
 
   it 'returns self if the String is not frozen' do