diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -217,6 +217,8 @@ the Design of Network-based Software Architectures](https://www.ics.uci.edu/~fie
 
 ## Testing
 
+* [Hikaku](https://github.com/codecentric/hikaku) - A library that tests if the implementation of a REST-API meets its specification. 
+
 ### Querying
 
 * [httpie](https://github.com/jkbrzt/httpie) - Command line HTTP client, far more dev-friendly than `curl`.