diff --git a/tests/integration/test_calibrate_mesmer_m.py b/tests/integration/test_calibrate_mesmer_m.py
index dfbb3b93..d1e1d864 100644
--- a/tests/integration/test_calibrate_mesmer_m.py
+++ b/tests/integration/test_calibrate_mesmer_m.py
@@ -1,5 +1,6 @@
 import importlib
 
+import numpy as np
 import pytest
 import xarray as xr