diff --git a/Contributing.md b/Contributing.md
index 3370d73..da11a44 100644
--- a/Contributing.md
+++ b/Contributing.md
@@ -81,6 +81,7 @@ To ensure your changes did not introduce any regressions you need to run the tes
 * `load` test: checks if the PDF file can be loaded without crashing
 * `eq` test: a reference test that takes correctly rendered snapshots and compares them to snapshots from the current code
 * `text` test: a reference test that takes snapshots of the `textLayer` overlay and compares them to snapshots from the current code
+* `annotations` test: a reference test that takes snapshots of the `annotationLayer` overlay (and the underlying page) and compares them to snapshots from the current code
 * `fbf` test: a forward-back-forward test
 * Unit tests: Jasmine unit tests that are run separately from the above tests