The opening 63-3 win over Italy was a strong start for the English but Moriarty knows that there were aspects of the game that they must improve on leading in to the clash with Australia on Friday (KO 6:35am BST).
"There were parts of the game against Italy where we were struggling to score, and to be honest we left a few tries out there. It was a tough physical game as expected.
"We've watched the Australians in a few warm-up games they've had, as well as the game they had against Argentina on Monday and they're quite similar to us in the way that they play. So we're expecting a really tough game but I really can't wait for it."
With such a short turnaround between the two games, and Gloucester looking to reintegrate several players into the line-up after the Autumn international series, Tom Savage told GRTV that the Cherry and Whites will keep changes to a minimum for the European Rugby Challenge Cup game in Zebre on Saturday.
Gloucester travel to Italy this weekend to take on Zebre in Round Four of the European Rugby Challenge Cup. The Cherry and Whites defeated the Italian side 35-10 last Sunday, but Director of Rugby David Humphreys is looking for an improved performance in the return fixture.
Skipper Billy Twelvetrees, speaking to GRTV after the 35-10 over Zebre, was happy with the bonus point win over the Italian side but admitted Gloucester will need to tighten up for the return fixture in Parma.
Matt Kvesic was a try scorer and recipient of the Man of the Match award in Sunday's 35-10 European Rugby Challenge Cup win over Zebre. He praised the Italian side for their spirited opposition and admitted that next week's return game will be a tough one.