Fix link in the guide book
@@ -10,7 +10,7 @@ cargo test --target wasm32-unknown-unknown
These tests all use a headless browser. See the [*Headless Browser
Tests* section for details on setup and
-configuration.](contributing.html#headless-browser-tests)
+configuration.](../contributing.html#headless-browser-tests)
## Grouping Tests
