Fix tests in 7 and 8

part8/README.md

@@ -1,4 +1,4 @@
-Part 7
+Part 8
 ======
 
 ## Installation
@@ -16,3 +16,10 @@ to fail; in that case, just run `elm package install` again.)
 elm live Main.elm --open -- --output=elm.js
 ```
 
+## Running Tests
+
+```bash
+cd test
+elm package install
+elm test TestRunner.elm
+```