Racing Point driver Lance Stroll will miss this weekend's Eifel Grand Prix due to an upset stomach, but has not been tested for coronavirus since Tuesday.
Stroll will be replaced by Nico Hulkenberg at the Nurburgring after Racing Point took a decision 30 minutes ahead of Saturday's final practice session to substitute its driver.
Team principal Otmar Szafnauer said Stroll had been unwell since he left the last race in Russia two weeks ago with "flu-like symptoms", but had returned "three or four" negative COVID-19 tests since then.
He was last tested for the virus on Tuesday at his mandatory pre-event test to gain access to the paddock at the Nurburgring, and Szafnauer said a bout of diarrhoea on Friday night ultimately led to the decision to miss the race weekend.