1 files changed, 26 insertions, 0 deletions
diff --git a/spec/ruby/core/kernel/frozen_spec.rb b/spec/ruby/core/kernel/frozen_spec.rb
index 9444b62249..fad1971985 100644
--- a/spec/ruby/core/kernel/frozen_spec.rb
+++ b/spec/ruby/core/kernel/frozen_spec.rb
@@ -49,4 +49,30 @@ describe "Kernel#frozen?" do
       @symbol.frozen?.should be_true
     end
   end
+
+  ruby_version_is "2.5" do
+    describe "on a Complex" do
+      it "returns true" do
+        c = Complex(1.3, 3.1)
+        c.frozen?.should be_true
+      end
+
+      it "literal returns true" do
+        c = eval "1.3i"
+        c.frozen?.should be_true
+      end
+    end
+
+    describe "on a Rational" do
+      it "returns true" do
+        r = Rational(1, 3)
+        r.frozen?.should be_true
+      end
+
+      it "literal returns true" do
+        r = eval "1/3r"
+        r.frozen?.should be_true
+      end
+    end
+  end
 end