In this article, we present a test environment for a word analysis system that is used for reliable and sense-conveying hyphenation of German words. A crucial task is the hyphenation of compound words, a huge set of those can readily be formed from existing words. Due to this fact, testing and checking all existing words for correct hyphenation is infeasible. Therefore we have developed special test methods for large text files which filter the few problematic cases from the complete set of analysed words. These methods include detecting unknown or ambiguous words, comparing the output of different versions of the word analysis system, and choosing dubious words according to other special criteria. The test system is also suited for testing other applications that are based on word analysis, such as full text search.