diff --git a/actionpack/CHANGELOG.md b/actionpack/CHANGELOG.md
index c75f0e83ac..2519eb4e2c 100644
--- a/actionpack/CHANGELOG.md
+++ b/actionpack/CHANGELOG.md
@@ -172,7 +172,7 @@
 
     *Yuji Yaginuma*
 
-*   Deprecate `ActionDispatch::TestResponse` response aliases
+*   Deprecate `ActionDispatch::TestResponse` response aliases.
 
     `#success?`, `#missing?` & `#error?` are not supported by the actual
     `ActionDispatch::Response` object and can produce false-positives. Instead,
diff --git a/guides/source/5_2_release_notes.md b/guides/source/5_2_release_notes.md
index 18d88d34a0..c464f86798 100644
--- a/guides/source/5_2_release_notes.md
+++ b/guides/source/5_2_release_notes.md
@@ -107,11 +107,14 @@ Please refer to the [Changelog][action-pack] for detailed changes.
 
 ### Removals
 
-ToDo
+*   Removed deprecated `ActionController::ParamsParser::ParseError`.
+    ([Commit](https://github.com/rails/rails/commit/e16c765ac6d))
 
 ### Deprecations
 
-ToDo
+*   Deprecated `#success?`, `#missing?` and `#error?` aliases of
+    `ActionDispatch::TestResponse`.
+    ([Pull Request](https://github.com/rails/rails/pull/30104))
 
 ### Notable changes