Google and Facebook pledged to help each other if they ever faced an antitrust investigation into their deal to work together in online advertising, according to a report in the Wall Street Journal.

The Wall Street Journal reported that Google and Facebook pledged to help one another if they ever faced an investigation into their pact to work together in online advertising.

The tech giants reportedly cut a deal in 2018 in which Facebook agreed not to compete with Google’s online advertising tools.

They were reportedly aware the deal could result in an antitrust probe and agreed to team up if they ever faced an antitrust investigation.