Tesla Inc.‘s (NASDAQ:TSLA) former data labelers and engineers do not trust the EV giant’s self-driving system as well as its safety data, according to a Reuters investigation released on Thursday.

Doubts Over System’s Safety

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The news agency conducted interviews with over nine former data labelers, as well as a former Tesla engineer, who pointed to the company’s system struggling with things like avoiding emergency vehicles, as well as school buses and giving motorcycles space.

The interviewees said that they worked long hours to train the system on specific conditions to make it appear more capable than it was.