This contribution proposes addition of new conformance tests of multiple profile/tier/level (PTL) support in multilayer coding. In VVC specifications, when the number of layers to be encoded is greater than 1, multiple PTLs can be signalled in VPS. For each PTL, profile, tier and general constraints information is optionally signalled based on vps_pt_present_flag. However, the current implementation of VTM-18.0 only allows one profile, tier, and general constraints information to be signalled in the VPS. Due to this limitation, VTM-18.0 does not work properly in the case of multiple PTL signalling for different OLSs such as applying Main 10 profile to the base layer and Multilayer Main 10 profile to the enhancement layer.