diff --git a/unit_tests/bet/feedsRun.mask_only b/unit_tests/bet/feedsRun.mask_only
index 37d06a6040619dab133a178f74771ac1e49567ca..23ec902e4f8b848fc3b24672afcbffa73bef5344 100755
--- a/unit_tests/bet/feedsRun.mask_only
+++ b/unit_tests/bet/feedsRun.mask_only
@@ -12,7 +12,7 @@ FSLDIR = os.environ['FSLDIR']
 
 cmd = [
     'bet',
-    join(FSLDIR, 'data', 'standard', 'MNI152_T1_1mm.nii.gz'),
+    join(FSLDIR, 'data', 'standard', 'MNI152_T1_2mm.nii.gz'),
     join(OUTDIR, 'bet_test.nii.gz'),
     '-n',
     '-m']