diff --git a/test/test_registration.py b/test/test_registration.py
index 417237c..b648f3e 100644
--- a/test/test_registration.py
+++ b/test/test_registration.py
@@ -71,8 +71,16 @@ def test_ANTs_config_b0(datadir, tmp_path, dataset, r_x, r_y, r_z, t_x, t_y, t_z
         random_seed=1234,
         num_threads=cpu_count(),
     )
+    # Debug
+    print(registration.cmdline)
+    print(f"{list(tmp_path.glob('**/*'))}")
 
-    result = registration.run(cwd=str(tmp_path)).outputs
+    ret = registration.run(cwd=str(tmp_path))
+    print(f"{list(tmp_path.glob('**/*'))}")
+    print(f"stdout:\n{ret.runtime.stdout}")
+    print(f"stderr:\n{ret.runtime.stderr}")
+    print(f"merged:\n{ret.runtime.merged}")
+    result = ret.outputs
     xform = nt.linear.Affine(
         nt.io.itk.ITKLinearTransform.from_filename(result.forward_transforms[0]).to_ras(),
         reference=b0nii,