diff --git a/src/test/java/de/jottyfan/timetrack/moduls/done/TestWholeDaySummaryBean.java b/src/test/java/de/jottyfan/timetrack/moduls/done/TestWholeDaySummaryBean.java
index 1794981..ec6a5d9 100644
--- a/src/test/java/de/jottyfan/timetrack/moduls/done/TestWholeDaySummaryBean.java
+++ b/src/test/java/de/jottyfan/timetrack/moduls/done/TestWholeDaySummaryBean.java
@@ -18,6 +18,7 @@ public class TestWholeDaySummaryBean {
 		assertEquals("00:12", new WholeDaySummaryBean("", "", "08:00", "").getOvertime());
 		assertEquals("-00:48", new WholeDaySummaryBean("", "", "07:00", "").getOvertime());
 		assertEquals("-07:48", new WholeDaySummaryBean("", "", "00:00", "").getOvertime());
-		assertEquals("", new WholeDaySummaryBean("", "", "", "").getOvertime());
+		assertEquals("-07:48", new WholeDaySummaryBean("", "", "", "").getOvertime());
+		assertEquals("", new WholeDaySummaryBean("", "", "a:b", "").getOvertime());
 	}
 }