Abstract
This article examines approaches to assessing the validity and reliability of language tests, explores the problems associated with these processes, and focuses on the often-ignored assessment of advanced linguistic abilities, including speaking, reading, writing, and various aspects of comprehension. This reveals the complex nature of language as an area of scientific research using educational techniques. When developed following established scientific principles, language tests can seamlessly integrate various skills into a single learning process. These tests not only measure the level of language proficiency but also provide valuable information about methodological and educational strategies, serving as an important element in teaching a foreign language. The reliability of the test can be assessed using the internal consistency coefficient calculated with the Spearman-Brown formula. With this method, the results of odd and even questions are compared to determine the internal reliability of the test. In the realm of foreign language testing, several key factors are highlighted that impact the effectiveness, reliability, and validity of these assessments. The article outlines the key characteristics and considerations essential for creating effective language assessments.