TST: Regression test for gh-2561

1 files changed, 14 insertions, 0 deletions

diff --git a/numpy/lib/tests/test_regression.py b/numpy/lib/tests/test_regression.py
index 43c0d8636..d304a47c4 100644
--- a/numpy/lib/tests/test_regression.py
+++ b/numpy/lib/tests/test_regression.py
@@ -1,5 +1,6 @@
 from __future__ import division, absolute_import, print_function
 
+import os
 import sys
 
 import numpy as np
@@ -240,6 +241,19 @@ class TestRegression(TestCase):
         except:
             raise AssertionError()
 
+    def test_py3_compat(self):
+        # gh-2561
+        # Test if the oldstyle class test is bypassed in python3
+        class C():
+            """Old-style class in python2, normal class in python3"""
+            pass
+
+        out = open(os.devnull, 'w')
+        try:
+            np.info(C(), output=out)
+        finally:
+            out.close()
+
 
 if __name__ == "__main__":
     run_module_suite()