Daily quality control testing of a γ-camera is of the utmost importance in assessing whether the camera is suitable for clinical use. The aim of our study was to assess the suitability of a fillable Ce-based flood field phantom developed in-house for daily quality control testing of γ-cameras. Daily uniformity testing was performed for 113 d using the fillable Ce phantom and a commercially available sheet-type Co phantom, and the results were compared. The average integral uniformity obtained by the Ce and Co phantoms was 3.24% and 2.72%, respectively, for detector 1 and 3.31% and 2.78%, respectively, for detector 2. The Ce phantom we developed is a suitable alternative to the commercially available Co phantom.