1 files changed, 10 insertions, 7 deletions
diff --git a/spec/ruby/core/integer/dup_spec.rb b/spec/ruby/core/integer/dup_spec.rb
index f46bdf89bd..3e5739ad37 100644
--- a/spec/ruby/core/integer/dup_spec.rb
+++ b/spec/ruby/core/integer/dup_spec.rb
@@ -1,10 +1,13 @@
-require File.expand_path('../../../spec_helper', __FILE__)
+require_relative '../../spec_helper'
 
-ruby_version_is '2.4' do
-  describe "Integer#dup" do
-    it "returns self" do
-      int = 2
-      int.dup.should equal(int)
-    end
+describe "Integer#dup" do
+  it "returns self for small integers" do
+    integer = 1_000
+    integer.dup.should.equal?(integer)
+  end
+
+  it "returns self for large integers" do
+    integer = 4_611_686_018_427_387_905
+    integer.dup.should.equal?(integer)
   end
 end