diff --git a/tests/test_scripts/test_immv_imcp.py b/tests/test_scripts/test_immv_imcp.py
index b5a2f595cdbc501b894e7d264fd3fa47467c07df..582a23d7c74f3ac53025fcafa51e579d33ff3cc4 100644
--- a/tests/test_scripts/test_immv_imcp.py
+++ b/tests/test_scripts/test_immv_imcp.py
@@ -11,6 +11,7 @@ import               tempfile
 
 import               pytest
 
+import numpy as np
 import nibabel as nib
 
 from   fsl.utils.tempdir import tempdir