diff --git a/tests/cql/CqlDateTimeOperatorsTest.xml b/tests/cql/CqlDateTimeOperatorsTest.xml
index 193a390..1cdf904 100644
--- a/tests/cql/CqlDateTimeOperatorsTest.xml
+++ b/tests/cql/CqlDateTimeOperatorsTest.xml
@@ -821,6 +821,16 @@
years between DateTime(2005, 5) and DateTime(2010, 4)
+
+
+ years between @2012-02-29 and @2014-02-28
+
+
+
+
+ years between @2012-02-29T12:34:56 and @2014-02-28T12:34:56
+
+
months between @2014-01-31 and @2014-02-01