1 files changed, 9 insertions, 0 deletions
diff --git a/numpy/lib/tests/test_packbits.py b/numpy/lib/tests/test_packbits.py
index 4bf505f56..965cbf67c 100644
--- a/numpy/lib/tests/test_packbits.py
+++ b/numpy/lib/tests/test_packbits.py
@@ -213,6 +213,15 @@ def test_packbits_large():
     assert_raises(TypeError, np.packbits, np.array(a, dtype=float))
 
 
+def test_packbits_very_large():
+    # test some with a larger arrays gh-8637
+    # code is covered earlier but larger array makes crash on bug more likely
+    for s in range(950, 1050):
+        for dt in '?bBhHiIlLqQ':
+            x = np.ones((200, s), dtype=bool)
+            np.packbits(x, axis=1)
+
+
 def test_unpackbits():
     # Copied from the docstring.
     a = np.array([[2], [7], [23]], dtype=np.uint8)