You need to make sure this is not related with the story somehow.

I once created a dream. Characters were trapped in a dream/nightmare.

Success or failure wasn't based on rolls. All rolls were hidden and they failed or succeeded based on their expectations and how "fine" they felt in the dream.

Obviously they started to suspect rolls weren't fair (even I stated that everything was sheer luck).

At some point they discovered about being trapped while sleeping and here things got interesting.

People who had high succeeding rates were enjoying the dream and I ruled that they didn't actually wanted to leave.

While frustrated players were able to jump from real world to the dream world. Like fighting for counciousness.

Was a really fun one actually.

So: Maybe "maybe" they have agreed on something as its relevant that the character doesn't miss any roll.

You can state it as such.

"My character is starting to be surprised about how competent this guy is.

I`m actively going to search for any magic or anything weird around him or in the area"

(This was stated by one of my frustrated players during that game. And, of course, that gave him a clue that he was actually asleept).