What Test Houses Do UK Slot Sites Use?

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Every good online slot site uses a test house, as they ensure that their games are completely fair – something every online slot player wants to see. But what exactly are test houses, and what are the main test houses used by UK slot sites? Keep on reading and you’ll find out…

What Are Test Houses?

So, what exactly are test houses? Well, they are independent companies who test various aspects of online casinos. Perhaps the most important thing they do though is check the random number generators used to power games, in order to ensure that every single spin of the reels is a completely fair one. The result? Every single player has the same chance as the previous player of winning a prize.

It is not compulsory for a slot site to have their games tested by a test house, however most still do. This is because players are naturally very cautious when it comes to the fairness of games, and a certificate from a reputable test house does a lot to calm these concerns. You’ll generally find the logo at the bottom of a homepage. This can be clicked on, and you’ll be taken to the site’s certificate.

The Major UK Test Houses

There are three main test houses used by UK slot sites – eCOGRA, GLI and iTech Labs. There used to be a fourth, called TST, however this is now a part of GLi. Take a look below to find out about each of them.


Undoubtedly the biggest test house around is eCOGRA. This company monitors many of the world’s biggest gambling sites and can be trusted by absolutely every single player. They’ve been casting their eyes over casino games since 2003, and they also work with some of the biggest casino software providers around.


GLI have been around since 1989. They were formed with the intention of verifying the fairness of land-based games, however quickly made the move over to the digital world when online gambling became popular. They aren’t as big as eCOGRA, however their logo still means that you can completely trust the site displaying it.

iTech Labs

Finally, there’s iTech Labs, the last of the three main companies described on this page. They’re from Australia and have been around since 2004, and they boast a staff with over 100 years of combined experience in the industry. They’re not as large as the other two companies on this list, however they’re still large enough to be major players.

Other Test Houses

In total, there are 15 different test houses approved by the UK Gambling Commission and you can see the list by checking the page on the UKGC website. If you ever see that a site has had games verified by a company not on this list, please do not play at the site, as there’s no guarantee that it’s a fair one.

Please be assured that the UK Gambling Commission has incredibly strict criteria when it comes to accepting a site onto this list. This means that those on the list really are the best of the best, with everything in place to do a perfect job.


So, that’s everything you really need to know about test houses in the UK. They really are a vital part of the online gambling industry, as they ensure that you are always treated fairly when you gamble online.

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