This study is a conceptual replication of Teimouri et al.'s (2022) investigation into the validity of the second language (L2) grit scale (the L2-Grit scale). There are several concerns about the generalizability of the findings of Teimouri et al. (2022), especially regarding the discriminant validity of the scale and the relation of L2 grit with language achievements. A conceptual replication study was conducted because these concerns could be addressed by using a different methodology. The main findings include: (a) the factor structure of L2 grit was supported in the replication sample (106 English majors at a Japanese university), (b) the results support the discriminant validity of L2 grit, but in a different way from the initial study, and (c) L2 grit was a consistent predictor of L2-specific Grade Point Average and standardized test score. The results obtained lend further support for the validity of the L2-Grit scale.