Kenneth Zohore latched onto a Lee Tomlinson free kick to score the only goal of the game at Plymouth on Friday night.
The goal, Zohore's fourth of the week, came early in the second half and proved to be enough to give the first team their 4th win out of four so far this pre-season.
Cardiff City: Etheridge (Murphy, 45); Connolly (Richards, 30), Manga (Bamba, 45), Morrison, Bennett (Peltier, 73); Damour (Tomlin, 45), Gunnarsson (Halford, 70), Ralls; Mendez-Laing (Kennedy, 45), Ward (Meite, 80), Zohore (John, 66).
Cardiff goals: Zohore (49)
Plymouth Argyle: McCormick (Te Loeke, 80); Threkeld, Edwards (Wylde, 45), Bradley (Bentley, 80), Taylor-Sinclair; Songo'o (Sangster, 80), Fox (Sarcevic, 45); Ainsworth (Lameiras, 45), Carey (Fletcher, 80), Grant (Blissett, 45); Jervis (Sokolik, 45).
Subs not used: Sawyer,
Referee: Lee Swabey
Attendance: 5,021 (495 away)
REPORT | @kzohore's strike at @Only1Argyle continues the #Bluebirds' 100% pre-season record 👉 https://t.co/IUDPEGM3Kn#CityAsOne 🔵⚽️🔵⚽️ pic.twitter.com/c5VF9D9I1m
— Cardiff City FC (@CardiffCityFC) July 21, 2017