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-rw-r--r--silx/opencl/test/test_linalg.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/silx/opencl/test/test_linalg.py b/silx/opencl/test/test_linalg.py
index b72fa20..0b6c730 100644
--- a/silx/opencl/test/test_linalg.py
+++ b/silx/opencl/test/test_linalg.py
@@ -66,7 +66,7 @@ def gradient(img):
gradient = np.zeros(shape, dtype=img.dtype)
slice_all = [0, slice(None, -1),]
for d in range(img.ndim):
- gradient[slice_all] = np.diff(img, axis=d)
+ gradient[tuple(slice_all)] = np.diff(img, axis=d)
slice_all[0] = d + 1
slice_all.insert(1, slice(None))
return gradient