diff --git a/tests/test_land.py b/tests/test_land.py
index 0151f8c5..89e69340 100644
--- a/tests/test_land.py
+++ b/tests/test_land.py
@@ -24,7 +24,7 @@
 from wsimod.nodes.nodes import Node
 from wsimod.nodes.sewer import Sewer
 from wsimod.nodes.storage import Reservoir
-from wsimod.nodes.tanks import Tank
+from wsimod.nodes.tanks import Tank, DecayTank
 from wsimod.orchestration.model import to_datetime
 
 from pathlib import Path