1 files changed, 13 insertions, 0 deletions
diff --git a/spec/ruby/library/set/to_s_spec.rb b/spec/ruby/library/set/to_s_spec.rb
new file mode 100644
index 0000000000..f4c361f74f
--- /dev/null
+++ b/spec/ruby/library/set/to_s_spec.rb
@@ -0,0 +1,13 @@
+require File.expand_path('../shared/inspect', __FILE__)
+require 'set'
+
+ruby_version_is "2.5" do
+  describe "Set#to_s" do
+    it_behaves_like :set_inspect, :to_s
+
+    it "is an alias of inspect" do
+      set = Set.new
+      set.method(:to_s).should == set.method(:inspect)
+    end
+  end
+end