diff --git a/system/updated/tests/test_base.py b/system/updated/tests/test_base.py
index 699a0f0bd..c4894f271 100644
--- a/system/updated/tests/test_base.py
+++ b/system/updated/tests/test_base.py
@@ -133,7 +133,7 @@ class TestBaseUpdate:
 class ParamsBaseUpdateTest(TestBaseUpdate):
   def _test_finalized_update(self, branch, version, agnos_version, release_notes):
     assert self.params.get("UpdaterNewDescription").startswith(f"{version} / {branch}")
-    assert self.params.get("UpdaterNewReleaseNotes") == f"{release_notes}\n"
+    assert self.params.get("UpdaterNewReleaseNotes") == f"{release_notes}\n".encode()
     super()._test_finalized_update(branch, version, agnos_version, release_notes)
 
   def send_check_for_updates_signal(self, updated: ManagerProcess):