England ran in three first-half tries but faded after the interval on the way to a 31-12 win over Argentina at a gloomy Twickenham.
Lock Joe Launchbury, centre Billy Twelvetrees and winger Chris Ashton crossed the line to put the hosts, bristling with attacking intent, 24-6 ahead at half-time.
England, who fought back to beat Australia 20-13 last Saturday, struggled to maintain their momentum and Nicolas Sanchez kicked two penalties to reduce the deficit for the Pumas.
But the England replacement number eight Ben Morgan stormed over with a barrelling 20-metre run late on and the hosts completed a comfortable win to put themselves in good heart for next week's game against the All Blacks.
