diff --git a/src/simmer/tests/test_contrast.py b/src/simmer/tests/test_contrast.py
index 6a98aed..b70d836 100755
--- a/src/simmer/tests/test_contrast.py
+++ b/src/simmer/tests/test_contrast.py
@@ -20,7 +20,7 @@
 from simmer.contrast import contrast_curve_core as cc
 from simmer.contrast import twoD_weighted_std as wstd
 # from simmer.contrast import find_best_center
-from simmer.contrast import background_calc
+# from simmer.contrast import background_calc
 from simmer.contrast import hot_pixels