diff --git a/README.md b/README.md
index fe3f9bd..6d652f0 100644
--- a/README.md
+++ b/README.md
@@ -7,6 +7,11 @@ $ cabal build
 $ cabal run
 ```
 
+## running tests
+```
+$ cabal est
+```
+
 ## algorithms
 
 ### Modular square roots algorithms