A sliding door cassette for an expandable sliding door, having a sliding door, the sliding door cassette comprising:
- a sliding door insert including a sliding door assembly and a panel set, wherein a non-expandable sliding door leaf of the sliding door assembly of the sliding door insert is hooked into a guide rail of the sliding door cassette, and the panel set of the sliding door insert modifies a frame of the sliding door cassette for the sliding door leaf, wherein a stop panel of the panel set is arranged on a stop side of the frame and seals a stop side of the sliding door leaf, wherein a guide panel of the panel set is arranged on a top side of the frame and seals a top side of the sliding door leaf, and wherein a slot panel of the panel set is arranged on a slot side of the frame and seals a slot side of the sliding door leaf.