diff --git a/CHANGELOG.md b/CHANGELOG.md
index db8b1b26d96..32bf66fb902 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## Unreleased
+- Refactor InMemoryMetricExporter and add tests ([#3519](https://github.com/open-telemetry/opentelemetry-python/pull/3519))
 
 ## Version 1.21.0/0.42b0 (2023-11-01)