diff --git a/tests/integration/test_pytest_operator.py b/tests/integration/test_pytest_operator.py
index 03d2260..7f8fb94 100644
--- a/tests/integration/test_pytest_operator.py
+++ b/tests/integration/test_pytest_operator.py
@@ -35,9 +35,11 @@ async def test_build_and_deploy(self, ops_test):
                 applications:
                   reactive-framework:
                     charm: {{ charms["reactive-framework"] }}
+                    channel: null
                     num_units: 1
                   operator-framework:
                     charm: {{ charms["operator-framework"] }}
+                    channel: null
                     num_units: 1
             """,
             charms=await ops_test.build_charms(*charms),