diff --git a/fsl/tests/test_transform/test_affine.py b/fsl/tests/test_transform/test_affine.py
index 100b5db6daaa1aaa9e703b4eb5d1391e4375acbd..a5625be4ee397a61a3b92757df5814330b9b9fbf 100644
--- a/fsl/tests/test_transform/test_affine.py
+++ b/fsl/tests/test_transform/test_affine.py
@@ -89,7 +89,7 @@ def test_concat():
 def test_veclength(seed):
 
     def l(v):
-        v = np.array(v, copy=False).reshape((-1, 3))
+        v = np.asarray(v).reshape((-1, 3))
         x = v[:, 0]
         y = v[:, 1]
         z = v[:, 2]