Currently, the streaming service has three tiers available, Basic, costing £5.99 per month, Standard at £7.99 and Premium for £9.99.
However, some would-be customers have begun to notice the headline rates vary according to which browser or device they use to sign in. Prices have varied by between £1 and £2.
It is not the first time that Netflix has tried out various pricing strategies before bringing in an across the board increase in a particular market.
Netflix says it tries out the various pricing levels in order to understand how its product is valued.
Earlier this month, Broadband TV News reported a price test was underway in Poland with reports of a similar scheme in Italy.
In January, Netflix introduced increases for its US subscribers with Basic, Standard and Premium plans all rising by between one and two dollars.