Elon Musk criticized a Wall Street Journal article detailing how leaders at Tesla and SpaceX are worried about his drug use, saying he didn’t fail drug tests and touting the business successes at his companies.

He weighed in with a series of social-media posts after the article said the leaders are concerned his drug use could harm his companies. The Journal reported over the weekend that Musk has used LSD, cocaine, ecstasy and psychedelic mushrooms, according to people who have witnessed his drug use and others with knowledge of it.