diff --git a/.gitignore b/.gitignore
index 2ee284d..3b4120c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,9 @@
 *.pyc
 *.pyo
 
+# Generated by `pip install -e .`
+*.egg-info
+
 # Generated by setuptools
 MANIFEST
 dist/
diff --git a/README.markdown b/README.markdown
index 3ebb453..ce453af 100644
--- a/README.markdown
+++ b/README.markdown
@@ -69,3 +69,10 @@ Set up environment using virtualenvwrapper:
 
     mkvirtualenv --no-site-packages screenplain
     pip install -r requirements.txt
+    pip install -e .
+
+After this, the `screenplain` command will use the working copy of your code.
+
+To run unit tests and style checks, run:
+
+    bin/test