Snapshotcello doesn’t remember groups version17snapshot: spec "generated by Snapshotcello" <version: '1.7-snapshot'> spec for: #common do: [ self populateSpec: spec with: self snapshot1. spec group: 'Core' with: #( 'PetitParser' 'PetitAnalyzer' ). spec group: 'Tests' with: #( 'PetitTests' 'PetitAnalyzer' ) ] version18snapshot: spec "generated by Snapshotcello" <version: '1.8-snapshot'> spec for: #common do: [ self populateSpec: spec with: self snapshot2 ] I suspect adding the last two lines of version17snapshot: might be helpful. Stephan