diff --git a/test/test_timeout.rb b/test/test_timeout.rb
index 0a8dc45..8bfe80c 100644
--- a/test/test_timeout.rb
+++ b/test/test_timeout.rb
@@ -19,6 +19,18 @@ def test_non_timing_out_code_is_successful
     end
   end
 
+  def test_allows_zero_seconds
+    assert_nothing_raised do
+      assert_equal :ok, Timeout.timeout(0){:ok}
+    end
+  end
+
+  def test_allows_nil_seconds
+    assert_nothing_raised do
+      assert_equal :ok, Timeout.timeout(nil){:ok}
+    end
+  end
+
   def test_included
     c = Class.new do
       include Timeout