A space-bound partnership with NASA is about to bring some extra scrutiny here on earth to SpaceX and Boeing Co. NASA is describing the investigation it will conduct into the workplace safety culture at the two companies as “a cultural assessment study” that will focus on workplace safety – as well as adherence to a drug-free environment.

“We fully expect our commercial partners to meet all workplace safety requirements in the execution of our missions,” said NASA in a statement.

SpaceX and Tesla CEO Elon Musk drew considerable controversy two months ago when he smoked a marijuana joint and drink whiskey during a livestreamed interview with the comedian Joe Rogan. A video of the interview went viral.

The investigation is expected to involve interviewing hundreds of employees of the two companies and could cause a delay in the development of SpaceX’s Crew Dragon and Boeing’s Starliner spacecraft, which are set to carry astronauts into space as soon as next year under NASA’s commercial crew program.