diff --git a/pandas/tests/test_indexing.py b/pandas/tests/test_indexing.py
index 67c87277647c8..574d1a4ddb0c3 100644
--- a/pandas/tests/test_indexing.py
+++ b/pandas/tests/test_indexing.py
@@ -15,7 +15,8 @@
 from pandas.core.api import (DataFrame, Index, Series, Panel, notnull, isnull,
                              MultiIndex, DatetimeIndex, Float64Index, Timestamp)
 from pandas.util.testing import (assert_almost_equal, assert_series_equal,
-                                 assert_frame_equal, assert_panel_equal)
+                                 assert_frame_equal, assert_panel_equal,
+                                 assert_isinstance)
 from pandas import compat, concat
 
 import pandas.util.testing as tm
@@ -1841,6 +1842,16 @@ def check_slicing_positional(index):
         #self.assertRaises(TypeError, lambda : s.iloc[2.0:5.0])
         #self.assertRaises(TypeError, lambda : s.iloc[2:5.0])
 
+    def test_array_indexing(self):
+        """test that array indexing returns a sequence by calling len()"""
+        column = Series(np.arange(10))
+        indices = np.arange(5, 10)
+        assert_isinstance(column.iloc[indices], Series)
+        indices = np.array([5], dtype = int)
+        assert_isinstance(column.iloc[indices], Series)
+        indices = np.array([], dtype = int)
+        assert_isinstance(column.iloc[indices], Series)
+
 
 if __name__ == '__main__':
     import nose
diff --git a/pandas/util/testing.py b/pandas/util/testing.py
index 946a4d94b6045..9394c41627458 100644
--- a/pandas/util/testing.py
+++ b/pandas/util/testing.py
@@ -167,7 +167,7 @@ def assert_isinstance(obj, class_type_or_tuple):
     """asserts that obj is an instance of class_type_or_tuple"""
     assert isinstance(obj, class_type_or_tuple), (
         "Expected object to be of type %r, found %r instead" % (
-            type(obj), class_type_or_tuple))
+            class_type_or_tuple, type(obj)))
 
 def assert_equal(a, b, msg=""):
     """asserts that a equals b, like nose's assert_equal, but allows custom message to start.