1 files changed, 13 insertions, 0 deletions
diff --git a/test/ruby/test_not.rb b/test/ruby/test_not.rb
new file mode 100644
index 0000000000..12e4c4b696
--- /dev/null
+++ b/test/ruby/test_not.rb
@@ -0,0 +1,13 @@
+# frozen_string_literal: false
+require 'test/unit'
+
+class TestNot < Test::Unit::TestCase
+  def test_not_with_grouped_expression
+    assert_equal(false, (not (true)))
+    assert_equal(true, (not (false)))
+  end
+
+  def test_not_with_empty_grouped_expression
+    assert_equal(true, (not ()))
+  end
+end