Tests fail with System.IO.FileLoadException: Could not load file or assembly 'Castle.Core, Version=3.3.0.0, Culture=neutral, PublicKeyToken=407dd0808d44fbdc' or one of its dependencies

[sanderaernouts]

System.IO.FileLoadException: Could not load file or assembly 'Castle.Core, Version=3.3.0.0, Culture=neutral, PublicKeyToken=407dd0808d44fbdc' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040). When other dependencies download a Higher 4.* version of castle core