For slope stability analysis, the constant shear drained (CSD) is considered more reliable for mimicking field conditions, such as infiltration. In past studies, the CSD test was conducted using the triaxial (TA) test device, which is time consuming and expensive. In this study, a new technic was used to conduct the CSD test using a direct simple shear (DSS) device, which is easier and less time consuming. To conduct this test, the specimen was prepared using the moist tamping method, with a size of 50 mm in diameter and 27 mm in height. The CSD path was achieved by reducing the effective normal stress at a constant rate. Additionally, different interpretation techniques for CSD test, originally developed for TA conditions, have been modified for the DSS condition to determine the instability point. These include: (i) rapid generation of axial strain, (ii) change of volumetric dilation to contraction, (iii) εv⁄ε1 − p′, method, (iv) a modified second-order work criterion (volumetric strain = εv). The second-order work method is found more reliable than the other methods.