Davor Suker was the mastermind behind Croatia's win over neighbours Bosnia, providing a goal and an assist.
Croatia, who kick off their World Cup campaign against Group G opponents Mexico on 3 June, always looked comfortable against Bosnia, and took the lead on the 44th minute through Ivica
The striker was fed through by Suker, leaving him to round the Bosnia keeper Almir Tolja and slot home.
Suker, who played as an attacking midfielder as opposed to his customary role as striker, scored Croatia's second 10 minutes after the break.
Stjepan Tomas latched on to a pass inside the 18-yard-box only to be brought down by Tolja.
Suker did the honours and placed the subsequent penalty away from the reach of the Bosnia keeper.
Bosnia also had their fair share of chances with Elvir Bolic and Bayern Munich's Hasan
Salihamidzic threatening in and around the penalty area, although they rarely looked as if they would penetrate a solid Croat defence.
Bolic did manage one shot that was deflected over the crossbar while Salihamidzic's curling shot narrowly drifted wide.
Croatia, who reached the semi-finals of the 1998 World Cup, also have Italy and Ecuador in their group at Korea/Japan.
Croatia: Pletikosa (Butina, 60),
Zivkovic (Sablic, 78), Simunic,
Tomas, Soldo, Kovac, Jarni (Seric, 46), Prosinecki (Kovac, 46),
Suker (Bosnjak, 70), Vlaovic, Olic
Bosnia: Tolja, Konjic, Hibic,
Duro (Hota, 70), Papac, Music,
Sabic (Biscevic, 60), Akrapovic,
Salihamidzic (Topic, 70), Bolic (Muratovic, 75), Barbarez, (Katic, 75).