Add a slice test with high < low.
diff --git a/Lib/test/test_array.py b/Lib/test/test_array.py
index c24b41b..078d727 100755
--- a/Lib/test/test_array.py
+++ b/Lib/test/test_array.py
@@ -428,6 +428,11 @@
         )
 
         self.assertEqual(
+            a[2:1],
+            array.array(self.typecode)
+        )
+
+        self.assertEqual(
             a[1000:],
             array.array(self.typecode)
         )