diff --git a/README.md b/README.md
index a00fc5f..5584d9e 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,10 @@
 # PyFME
 Python Flight Mechanics Engine
+
+## How to run the tests
+
+Install in editable mode and call `py.test`:
+
+    $ pip install -e .
+    $ py.test