London Irish made it three victories from three pool games, beating Stade Francais 24-13 in the Challenge Cup.
Tom Fowlie's first-half try and three Shane Geraghty penalties gave the Exiles a 14-3 lead at the interval.
Jerome Porical landed a penalty for the visitors, who were also boasting a 100% record going into the match.
Olivier Missoup crossed for the French side to reduce the gap but another Geraghty penalty and Alex Lewington's converted score sealed an Irish win.
London Irish: Lewington; Fowlie, Mulchrone, Armitage, Fenby; Geraghty, Allinson; Yapp, Stevens, Halavatau; Rouse, Evans; Low, Sinclair, Hala'ufia.
Replacements: Sheridan for Fowlie (62), Dorrian for Geraghty (77), O'Leary for Allinson (77), Danaher for Sinclair (24).
Not Used: Mayhew, Parr, Hagan, Harris.
Sin Bin: Mulchrone (15), Rouse (56), Mayhew (67).
Stade Francais: Porical; Arias, M. Bosman, Danty, Camara; Plisson, Kingi; Taulafo, Bonfils, Kubriashvili; Mostert, van Zyl; Lavalla, Rabadan, Lyons.
Replacements: Lydon for Plisson (71), Dupuy for Kingi (57), Zhvania for Taulafo (53), Sempere for Bonfils (66), Missoup for Lavalla (5), Pape for Missoup (61).
Not Used: Attoub, Bonneval.
Sin Bin: Camara (72), Sempere (79).
Referee: Neil Paterson (SRFU).