A woman has offered what she calls an ancient but useful method for testing your partner’s faithfulness – and it’s really simple to do.

Aurie Louisse, whose username is @aurielouisse on TikTok, shared the video with her followers and explained that all you need to do to set ‘the trap’ is use the mirror in your partner’s car’s sun visor.

Then, leave the mirror half-open so that when you return to it, whether it is fully open or fully closed, you will know someone else has used it.

However, other TikTok users have slammed Aurie’s advice, claiming that the mirror may have been used by a family member or the partner themself, therefore it could be harmless.

Aurie’s video has nearly four million views and over a thousand comments, many of which congratulate her for sharing the trick.

One person said: “If there is no trust, there is no relationship.”

Another said: “If your gut is telling you something is off it’s probably true.”

Some others were skeptical of the technique and pointed out several potential flaws.

One user said: “One – it’s his car. Two – If there’s no trust no relationship. Three – Did you know some mothers use the mirrors in their child’s car?”

Another commented: “Until the car hits a speed bump and it fixes itself.”

This comes after one lady recently stated her wish for her partner to cheat so that she could leave him since her relationship was “unbearable”

The anonymous wife revealed that she has been in “a really difficult marriage for six years now” and that she and her husband had two school-aged children together.

She stated that she loves her children “very much” but that she “cannot handle” staying with her husband any longer and that she plans to leave as soon as she finds “a great job that’s well paid enough.”