 The SSNIP test seeks to identify the smallest relevant market within which a hypothetical monopolist or cartel could impose a profitable significant increase in price.The relevant market consists of a "catalogue" of goods and/or services which are considered substitutes by the customer.Such a catalogue is considered "worth monopolising" if should only one single supplier provided it, that supplier could profitably increase its price without its customers turning away and choosing other goods and services from other suppliers.