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-rw-r--r--numpy/random/tests/test_random.py4
1 files changed, 4 insertions, 0 deletions
diff --git a/numpy/random/tests/test_random.py b/numpy/random/tests/test_random.py
index c30037e1e..db4093ab4 100644
--- a/numpy/random/tests/test_random.py
+++ b/numpy/random/tests/test_random.py
@@ -18,6 +18,10 @@ class TestBinomial(TestCase):
assert_(random.binomial(0, p) == 0)
np.testing.assert_array_equal(random.binomial(zeros, p), zeros)
+ def test_p_is_nan(self):
+ # Issue #4571.
+ assert_raises(ValueError, random.binomial, 1, np.nan)
+
class TestMultinomial(TestCase):
def test_basic(self):