This study Investigates the impact of Teacher-Made Vocabulary Tests (TMVT) vs. Standardized Vocabulary Tests (STVT) on Reading Comprehension Performance of Iraqi Intermediate EFL Learners. After analyzing collected data out of treatment, assessment, and instrumentation, the researcher evaluated and interpreted the score obtained by 66 young Iraqi female students in two language schools in Iraq. The interpretation shows how the participants reacted to Teacher-made vocabulary tests as compared to their reactions to Standardized Vocabulary test. The crux of the matter was the degree to which such vocabulary tests affect the EFL learners’ performance in Reading Comprehension tests. The researcher reported that the use of Standardized vocabulary tests DOES play a significantly positive role in promoting the reading comprehension skills of Iraqi EFL college students. She also found that Teacher-made vocabulary tests DO play a significantly positive role in promoting the reading comprehension skills of Iraqi EFL college students. Finally, the researcher found that the t test value of 2.635 indicated a significant difference between the STVT and TMVT. This means that the use of TMVT is more effective than the implementation of STVT in encouraging Iraqi EFL learners to read more successfully.