diff --git a/tests/test_time_util.py b/tests/test_time_util.py
index badc90f..d4bcec0 100644
--- a/tests/test_time_util.py
+++ b/tests/test_time_util.py
@@ -84,4 +84,9 @@ def test_valid():
     print this_instance
     assert valid(this_instance) == False # unless on a very fast machine :-)
     soon = in_a_while(seconds=10)
-    assert valid(soon) == True
\ No newline at end of file
+    assert valid(soon) == True
+    
+def test_timeout():
+    soon = in_a_while(seconds=1)
+    time.sleep(2)
+    assert valid(soon) == False