The 21-year-old limped out of a practice match in Teresopolis after a collision with Tottenham star Paulinho and had ice and heavy strapping applied to his ankle.
But Bernard insists it was only an impact injury and is sure that his World Cup role is not in doubt.
“It's not twisted or anything," Bernard told reporters.
"I only left [the pitch] in anticipation of something worse and the ankle is swollen now.
“Preparing for the World Cup is like that. Football is a contact sport. Everyone wants to get their spot [in the starting line-up].”
In Scolari's nominal first-team on Saturday, Julio Cesar lined up in goal behind Daniel Alves, Dante, David Luiz and Marcelo. Luis Gustavo and Paulinho anchored the midfield with Oscar, Hulk, Fred and Neymar in the forward third.
The second team had Jefferson in goal. Maicon, Thiago Silva, Henrique and Maxwell made up the back four, while Fernandinho, Hernanes and Ramires played in midfield with Jo and Willian part of a front three alongside Bernard.
Reports suggest Lucas Moura of Paris Saint-Germain will replace Bernard in Scolari's final squad if the Shakhtar man succumbs to his injury.