Christian Beikov ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *closed* an issue as *Rejected* This is not a supported scenario. If your database is H2, then use the H2Dialect. H2 also has support for a UUID type. Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiZmYwMDBmYWU2... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-16980?atlOrigin=eyJpIjoiZmYwMD... ) HHH-16980 ( https://hibernate.atlassian.net/browse/HHH-16980?atlOrigin=eyJpIjoiZmYwMD... ) UUIDs are not compatible with h2 2.1.214 for unit testing when using PostgresDialect ( https://hibernate.atlassian.net/browse/HHH-16980?atlOrigin=eyJpIjoiZmYwMD... ) Change By: Christian Beikov ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) Resolution: Rejected Status: Open Closed ( https://hibernate.atlassian.net/browse/HHH-16980#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16980#add-comment?atlOrigin=ey... ) Get Jira notifications on your phone! Download the Jira Cloud app for Android ( https://play.google.com/store/apps/details?id=com.atlassian.android.jira.... ) or iOS ( https://itunes.apple.com/app/apple-store/id1006972087?pt=696495&ct=Em... ) This message was sent by Atlassian Jira (v1001.0.0-SNAPSHOT#100233- sha1:8d17c5d )