Branch: refs/heads/6.0 Home: https://github.com/hibernate/hibernate-validator Commit: 90124ab0ab03647c7ef18085010ecf7ea7d47f94 https://github.com/hibernate/hibernate-validator/commit/90124ab0ab03647c7... Author: marko-bekhta <marko.prykladna(a)gmail.com&gt; Date: 2019-04-09 (Tue, 09 Apr 2019) Changed paths: M engine/src/main/java/org/hibernate/validator/internal/constraintvalidators/hv/ISBNValidator.java M engine/src/test/java/org/hibernate/validator/test/internal/constraintvalidators/hv/ISBNValidatorTest.java Log Message: ----------- HV-1706 Update the check algorithms for ISBN10/ISBN13 - To be able to correctly handle the 0 checksum cases instead of determining a check digit a whole sum is calculated and then its modulo is compared to 0.