1 files changed, 15 insertions, 0 deletions
diff --git a/spec/ruby/core/time/inspect_spec.rb b/spec/ruby/core/time/inspect_spec.rb
index 01e1dfdaa6..85133838e2 100644
--- a/spec/ruby/core/time/inspect_spec.rb
+++ b/spec/ruby/core/time/inspect_spec.rb
@@ -3,4 +3,19 @@ require_relative 'shared/inspect'
 
 describe "Time#inspect" do
   it_behaves_like :inspect, :inspect
+
+  ruby_version_is "2.7" do
+    it "preserves milliseconds" do
+      t = Time.utc(2007, 11, 1, 15, 25, 0, 123456)
+      t.inspect.should == "2007-11-01 15:25:00.123456 UTC"
+    end
+
+    it "formats nanoseconds as a Rational" do
+      t = Time.utc(2007, 11, 1, 15, 25, 0, 123456.789)
+      t.nsec.should == 123456789
+      t.strftime("%N").should == "123456789"
+
+      t.inspect.should == "2007-11-01 15:25:00 8483885939586761/68719476736000000 UTC"
+    end
+  end
 end