diff --git a/examples/tutorial/README.rst b/examples/tutorial/README.rst
index 41f3f6ba..48033f43 100644
--- a/examples/tutorial/README.rst
+++ b/examples/tutorial/README.rst
@@ -71,6 +71,11 @@ Test
     $ pytest
 
 Run with coverage report::
+    If you haven't install `coverage`_.
+
+.. _coverage: https://coverage.readthedocs.io
+
+    $ pip install coverage # skip this line if you already installed coverage.
 
     $ coverage run -m pytest
     $ coverage report