The purpose of this study was to analyze the cognitive interference thinkings while testing. According to Mandler & Sarason (1952), test anxiety was defined as a “task-irrelevant thinkings which interfers test score”. In this study, to measure the task -irrelevant thinkings while testing, the Cognitive Interference Scale for collegestudents (CIS) was constructed. The Subjects were 143 college students (63 males and 80 females). By factor analysis, CIS was divided into 3 factors. They were named as follows: test avoidance factor, test negative factor, frustration factor. By using the CIS, the conclusion of this study were as follows.(1) The correlation between test anxiety and cognitive interference thinkings while testing was positive. Specially, high test anxiety subjects cognized test as a negative event.(2) The correlation between test fatigue and cognitive interference thinkings while testing proved positive. Specially, nervous fatigue by test caused test avoidance behavior.