diff --git a/language/range_spec.rb b/language/range_spec.rb
index 79500c6b33..4cde7e9488 100644
--- a/language/range_spec.rb
+++ b/language/range_spec.rb
@@ -15,6 +15,12 @@
     (1...).should == Range.new(1, nil, true)
   end
 
+  ruby_version_is "3.0" do
+    it "is frozen" do
+      (42..).should.frozen?
+    end
+  end
+
   ruby_version_is "2.7" do
     it "creates beginless ranges" do
       eval("(..1)").should == Range.new(nil, 1)