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-rw-r--r--numpy/lib/tests/test_arraysetops.py1
1 files changed, 1 insertions, 0 deletions
diff --git a/numpy/lib/tests/test_arraysetops.py b/numpy/lib/tests/test_arraysetops.py
index ec79600d7..ae4b3c3aa 100644
--- a/numpy/lib/tests/test_arraysetops.py
+++ b/numpy/lib/tests/test_arraysetops.py
@@ -247,6 +247,7 @@ class TestSetOps(object):
c = union1d(a, b)
assert_array_equal(c, ec)
+ # Tests gh-10340, arguments to union1d should be flattened if they are not already 1D
x = np.array([[0, 1, 2], [3, 4, 5]])
y = np.array([0, 1, 2, 3, 4])
ez = np.array([0, 1, 2, 3, 4, 5])