The spokesman said Monday it was too early to say how much melamine the chocolates contained. He declined to give his name because of company policy.
Cadbury said earlier the tests "cast doubt" on the safety of its Chinese-made products but didn't elaborate.
China's recent food safety scandal started with the discovery of melamine in baby milk powder.
Four deaths have been blamed on the bad milk, and some 54,000 children have developed kidney stones or other illnesses after drinking the contaminated baby formula.