In daily clinical practice, procedures for re-evaluation and manual diagnosis of patients are of considerable relevance. To enable an examination of the Superior Labrum Anterior-Posterior or SLAP lesion, a pathological displacement of the long upper biceps tendon in combination with a lesion of the superior glenoid, numerous clinical tests are described in the literature. The aim of the present study is to critically analyze the validity of particular clinical tests for the diagnosis of SLAP lesions and to discuss their sensitivity and specificity. Several databases such as PubMed, The Cochrane Library, Springer Link, Science Direct, and online databases of the Medical University and FH Campus Vienna were accessed to select studies in German or English language. Specifically, the “Active Compression Test“, the “Biceps Load Test II’ and the “Resistet Supination External Rotation Test“ are described in detail and analyzed in comparison to each other. When viewed case by case, each of the clinical tests described in the selected studies appears sufficiently valid. However, considerable differences among the studies become apparent regarding the specific approach chosen, key questions addressed and main results obtained. Although each of the three clinical procedures for the differential manual diagnosis, repeated assessments and detailed definition of the specific shoulder lesions appear appropriate for routine use, their validity needs to be further assessed in clinical practice.