diff --git a/bacnet-stack/unittest.sh b/bacnet-stack/unittest.sh
index 20c080e4..b8868829 100755
--- a/bacnet-stack/unittest.sh
+++ b/bacnet-stack/unittest.sh
@@ -89,6 +89,11 @@ make -f crc.mak
 ./crc >> test.log
 make -f crc.mak clean
 
+make -f datetime.mak clean
+make -f datetime.mak
+./datetime >> test.log
+make -f datetime.mak clean
+
 make -f demo/object/device.mak clean
 make -f demo/object/device.mak
 ./device >> test.log