diff --git a/tests/functional/tests/tests.yaml b/tests/functional/tests/tests.yaml
index 56f9114..69260fd 100644
--- a/tests/functional/tests/tests.yaml
+++ b/tests/functional/tests/tests.yaml
@@ -3,6 +3,7 @@ charm_name: prometheus-juju-exporter
 gate_bundles:
   - jammy
   - focal
+  - bionic
 
 tests:
   - tests.test_charm.BasicPrometheusJujuExporterTests