The testimony came on the fourth day of a doping trial that grew out of the drug scandal that nearly wrecked the 1998 Tour de France.
A former Festina cyclist, French star Richard Virenque, and nine former team officials are on trial on a range of charges.
The trial, which opened Monday, has led to stunning testimony about systematic doping of top Festina riders, and, Thursday, allegations that the Spanish Banesto team also used banned products to enhance cyclists' performance.
"In Banesto, there was a system of doping with medical supervision," Thomas Davy, who rode with Banesto from 1995 to 1996, told the court.
Banesto's champion rider, Miguel Indurain, rode the team to five Tour de France victories, from 1991 to 1995.
"Everyone did it?" Presiding Judge Daniel Delegove asked the rider.
"Yes. I think so," Davy replied.
Calls placed to Banesto team headquarters were unanswered.
The drug scandal led to the expulsion of the Festina team after a stash of products, notably the performance-enhancer EPO, were found in a team car.
Virenque on Tuesday broke down and admitted that he had taken drugs to improve his ride -- an about face after persistent denial. His testimony implicated the entire team, for which he said doping was routine practice.
"We don't say doping. We say we're preparing for the race," Virenque said Tuesday. "To take drugs is to cheat. As long as the person doesn't test positive, they're not taking drugs."
Among the nine others on trial are former Festina team trainer Bruno Roussel and Willy Voet, the Belgian physiotherapist caught just before the 1998 Tour started with a load of erythropoietin (EPO).
According to a notebook of Voet's presented in court Thursday, Virenque was injected with six doses of EPO during the first week of the 1997 Tour de France, along with growth hormones and four other performance-enhancing drugs during the month before the race.
Toxicology tests also presented in court stated that all Festina riders who participated in the 1998 Tour de France had taken the banned drug EPO.
Medical experts testified that the amount of doping products ingested by Festina athletes was alarming.
"It was more than 10 medications a day," said Gilbert Pepin, a toxicology expert.
Another medical expert, Marc Deveaux, told the court, "It was mixtures that in the long term could be dangerous."
Virenque, 30, asked if he feared the doping products he'd taken over the years would affect his long-term health, replied: "I'll see in a few years."