Canada forward Janine Beckie says her side cannot afford any defensive errors when they face Cameroon in their opening game in Montpellier on Monday.
Kenneth Heiner-Møller's side will be meeting the Africans for the first time at the international level in their Women's World Cup opener at Stade de la Mosson.
On their road to France, Canada are undefeated in nine friendlies in 2019, including a 2-1 win over African champions Nigeria in Spain in April.
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In spite of their fine preparatory run-in, the Manchester City forward is wary of the threats the Indomitable Lionesses could pose.