diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 0000000..cead7fc
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,10 @@
+# Contributing to Leaflet-IIIF
+
+Thanks for thinking about contributing to Leaflet-IIIF!
+
+## Contributing Code
+When contributing code, please follow the code and whitespace styles already established. Also test your new functionality by writing a test and running the test suite.
+
+```
+npm test
+```
diff --git a/README.md b/README.md
index e1a001e..a313b40 100644
--- a/README.md
+++ b/README.md
@@ -60,6 +60,12 @@ Run the server
 $ npm start
 ```
 
+Run the test suite
+
+```
+$ npm test
+```
+
 Access the examples at http://127.0.0.1:8080/examples/example.html
 
 ### Leaflet-IIIF Examples