For many people a random drug test at work is no problem; it's just a minor inconvenience to your day. For others, however, it's an instant nerve starter.
Whether you're partial to a spliff, are a part time cocaine taker at the weekend, or indulge in full blown heroin addiction, it's usually not going to end well.
Some people will get someone else to piss in their cup, or line up a number of excuses to plead their innocence.
One guy, working as a pipe fitter, claimed that a poppy seed roll from Morrisons is the reason his drug test came back positive for morphine.
The father-of-two, who has not been named, said he ate the roll the day before the test, and even privately paid £120 for a hair follicle test, which came back negative, the Mirror reports.
Morphine is derived from the opium poppy and is usually prescribed to patients suffering from high amounts of pain, however a letter from the man's GP proved he had never been on any prescribed medication which contained opiates.
He was suspended for 11 weeks from work because of the test, but was eventually reinstated, though his employer still doesn't believe his story.
"I am a married dad and have two grown up children, I have never taken drugs," he told the Liverpool Echo. "I was very shocked and wanted to get to the bottom of what it was.
"I thought to myself 'I have something in my body that I have no idea where it has come from' - it was very worrying."
A general view of an agricultural poppy field in Dorset. Credit: PA
After being left confused and having to "wrack his brain" for an explanation, he turned to the only help you need in these situations: Google.
He stumbled across a similar story about TV presenter Angela Rippon, who also tested positive for opiates, but it was later found it was because she had eaten poppy seed bread and a poppy seed bagel.
"I knew straight away that it had to be the poppy seeds I had eaten and I actually thought 'great' that explains it," he continued. "I'd had three poppy seeded bread rolls and poppy seeded bread the day and night before the test."
"I had nothing to hide at all and desperately wanted them to do this test.
"If I had done something wrong I wouldn't have wanted that or gone for a hair follicle test myself, but I wanted to know for myself where this positive reading had come from so I could avoid whatever it was.
"I knew I was in the right yet I was being forced to convince people I had worked with for years that I wasn't a liar or a druggy.
"This was my reputation and integrity at the end of the day as well as the fact my job was at stake."
The unnamed fella hasn't eaten poppy seeds since and is still attempting to clear his name, while Morrisons are putting checks in place with regards to the rolls.
Featured Image Credit: PA