1 files changed, 9 insertions, 1 deletions
diff --git a/spec/ruby/core/io/ungetbyte_spec.rb b/spec/ruby/core/io/ungetbyte_spec.rb
index 2639d24c45..2e51fb0298 100644
--- a/spec/ruby/core/io/ungetbyte_spec.rb
+++ b/spec/ruby/core/io/ungetbyte_spec.rb
@@ -49,7 +49,7 @@ describe "IO#ungetbyte" do
     end
   end
 
-  ruby_version_is '2.6' do
+  ruby_version_is '2.6'...'2.7' do
     it "is an RangeError if the integer is not in 8bit" do
       for i in [4095, 0x4f7574206f6620636861722072616e6765] do
         lambda { @io.ungetbyte(i) }.should raise_error(RangeError)
@@ -57,6 +57,14 @@ describe "IO#ungetbyte" do
     end
   end
 
+  ruby_version_is '2.7' do
+    it "never raises RangeError" do
+      for i in [4095, 0x4f7574206f6620636861722072616e6765] do
+        lambda { @io.ungetbyte(i) }.should_not raise_error
+      end
+    end
+  end
+
   it "raises an IOError if the IO is closed" do
     @io.close
     lambda { @io.ungetbyte(42) }.should raise_error(IOError)