Update tests/cupy_tests/math_tests/test_arithmetic.py
@@ -86,7 +86,7 @@ class TestArithmeticUnary:
if isinstance(arg1, numpy.ndarray):
arg1 = xp.asarray(arg1)
- if self.name in ('angle'):
+ if self.name in {'angle'}:
y = getattr(xp, self.name)(arg1, self.deg)
else:
y = getattr(xp, self.name)(arg1)
