Goalkeeper Heurelho Gomes, whose performances have been called into question since his summer move from PSV Eindhoven, again looked shaky as Bolton put plenty of crosses into the box to test the Brazilian.
Brazilian regulators don't have their own crash-test facility to verify automakers' claims about vehicle performance, nor are there independent labs in the country.
"The next few weeks will be an acid test for the host cities, " added Valcke, who has clashed with Brazilian authorities in the past when questioning the delay in preparations for FIFA's forthcoming events.