diff --git a/tests/test_module_system.py b/tests/test_module_system.py
index 1dd36c8..ee6a432 100644
--- a/tests/test_module_system.py
+++ b/tests/test_module_system.py
@@ -237,6 +237,7 @@ class ModuleSystemTests(unittest.TestCase):
                 "mail",
                 "notifications",
                 "addresses",
+                "dist_lists",
                 "postbox",
                 "approvals",
                 "reporting",
@@ -3443,12 +3444,25 @@ finally:
             "version_min": "0.2.0",
             "version_max_exclusive": "0.3.0",
         }, modules["campaigns"]["requires_interfaces"])
+        self.assertIn({
+            "name": "dist_lists.source",
+            "optional": True,
+            "version_min": "0.1.0",
+            "version_max_exclusive": "0.2.0",
+        }, modules["campaigns"]["requires_interfaces"])
+        self.assertIn({
+            "name": "dist_lists.expand",
+            "optional": True,
+            "version_min": "0.1.0",
+            "version_max_exclusive": "0.2.0",
+        }, modules["campaigns"]["requires_interfaces"])
         self.assertEqual(
             [
                 "files",
                 "mail",
                 "notifications",
                 "addresses",
+                "dist_lists",
                 "postbox",
                 "approvals",
                 "reporting",