diff --git a/CHANGELOG.md b/CHANGELOG.md
index c2ff79c..741062c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,15 @@
 # Changelog
 
+## Unreleased
+
+### Changed
+
+ - improved and sped up testing (first steps towards [#139](https://github.com/GIScience/ohsome-py/issues/139))
+
+### Fixed
+
+ - removed time-dependency of unit tests that would cause them to fail at any time after the cassettes were recorded
+
 ## 0.3.0
 
 ### Added