Trails: Testing the DAO

Hello,

I have some problems with this trail: https://help.hybris.com/6.4.0/hcd/7454bfb78cc948fda50c30714e37694a.html#loiod3cc1660aaf44e92a859486e257afae1

I've done all the steps described there, although I've faced some issues, but now I encounter this error when I run the tests:

Caused by: java.lang.ClassNotFoundException: de.hybris.platform.ruleengineservices.validation.constraints.ObjectPattern

..... de.hybris.platform.persistence.property.JDBCValueMappings$BlobValueWriter.readValue(JDBCValueMappings.java:1418) ~[coreserver.jar:?]

I don't see that class anywhere.