diff --git a/HISTORY.rst b/HISTORY.rst
index 81e28cc9..f5ace81f 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -16,6 +16,8 @@ PlatformIO 3.0
   and ``srcFilter`` field
 * Do not ask for board ID when initialize project for desktop platform
 * Fixed issue when can not load broken PIO Core state
+* Fixed an issue with a custom transport for `PIO Unit Testing <http://docs.platformio.org/page/plus/unit-testing.html>`__
+  when multiple tests are present
 
 3.4.0 (2017-06-26)
 ~~~~~~~~~~~~~~~~~~