Andy Carroll and Mark Noble were on target as West Ham kept their chances of a top-four finish alive with a 3-1 win over Watford.
Carroll hit his sixth goal in six games and Noble tucked away two penalties to move the Hammers to within four points of fourth-placed Arsenal.
The duo are likely to be overlooked for England's Euro 2016 squad this summer, but they could still be embarking on a European adventure with West Ham next season instead.
Carroll said: "We knew there were going to be changes and the tactics were go out there and get at them and that's exactly what we did.
"I felt we were in control from the beginning. It was positive for us all around."
West Ham could hardly have asked for more obliging opposition, though, with Watford now safe from relegation and gearing up for Sunday's FA Cup semi-final.
The Hornets clearly had one eye on their Wembley meeting against Crystal Palace with boss Quique Sanchez Flores making seven changes.
Yet they still pulled one back through Sebastian Prodl and had a late penalty of their own saved before striker Nordin Amrabat was sent off in injury time.
Watford manager Quique Sanchez Flores said: "The application was very good from us. We conceded really early and then it was very tough to play against a tough team like West Ham as they had confidence early.
"In the second half, we reacted really well but not good enough to reduce three goals."
West Ham: Adrian, Antonio, Reid, Ogbonna, Cresswell, Noble, Kouyate, Lanzini, Sakho (Moses 78),Carroll (Emenike 87), Payet (Collins 90).
Goals: Carroll 11,Noble 45 pen,53 pen.
Watford: Gomes, Paredes, Prodl, Cathcart, Holebas, Guedioura (Anya 57), Behrami, Mario Suarez, Abdi (Deeney 76), Jurado (Berghuis 56), Amrabat.
Sent Off: Amrabat (90).
Booked: Prodl,Mario Suarez,Amrabat.
Goals: Prodl 64.
Referee: Mike Dean (Wirral).