We are using POI 3.8 in in our application. Our project is using dbunit to load data sets from .xls files, and apparently dbunit is incompatible with POI 3.8. I get the following exception, java.lang.NoSuchMethodError: org.apache.poi.hssf.usermodel.HSSFDateUtil.isCellDateFormatted(Lorg/apache/poi/hssf/usermodel/HSSFCell;)Z It seems dbunit requires POI 3.2. However I cannot downgrade my POI version