France go into the game in Milton Keynes second in Pool D after victories over Italy (32-10) and Romania (38-11).
A sloppy first-half performance against Romania last week led to Saint-Andre laying into his team during the break.
“It was deserved as we weren’t sticking to the team plan,” said Spedding. “We reacted well to what he had to say.”
Wing Remy Grosso will make his Test debut after being drafted into the squad for Yoann Huget, who sustained a cruciate knee ligament injury against Italy.