diff --git a/tests/integration/requirements.txt b/tests/integration/requirements.txt
index 81a7496e..9b74c7cb 100644
--- a/tests/integration/requirements.txt
+++ b/tests/integration/requirements.txt
@@ -3,4 +3,5 @@ juju~=3.3.0  # must be compatible with the juju CLI version installed by CI
 pytest
 pytest-operator
 prometheus-client
-pyinstaller
\ No newline at end of file
+pyinstaller # required to bundle export_mock_metrics script to send it to hw-oberver unit
+tenacity
\ No newline at end of file