diff --git a/insertion_sort01.py b/insertion_sort01.py
index 1fbf329..32cdaea 100644
--- a/insertion_sort01.py
+++ b/insertion_sort01.py
@@ -1,4 +1,7 @@
+# vim:fileencoding=utf-8
+
 def insertion_sort(a):
+    """ Θ(n^2) """
     for j in range(1, len(a)):
         key = a[j]
         i = j - 1
diff --git a/test_insertion_sort01.py b/test_insertion_sort01.py
index baff970..a58c225 100644
--- a/test_insertion_sort01.py
+++ b/test_insertion_sort01.py
@@ -15,7 +15,7 @@ class Test(unittest.TestCase):
 
         self.assertEqual(expected, a)
 
-    def test_big_example(self):
+    def test_100_example(self):
         tmpl = list(range(0, 1000))
         a = tmpl[:]
         random.shuffle(a)
@@ -25,8 +25,17 @@ class Test(unittest.TestCase):
 
         self.assertEqual(expected, a)
 
-    def test_bigger_example(self):
-        tmpl = list(range(0, 10000))
+    def test_reversed_100_example(self):
+        tmpl = list(range(0, 1000))
+        a = list(reversed(tmpl[:]))
+        expected = tmpl[:]
+
+        insertion_sort01.insertion_sort(a)
+
+        self.assertEqual(expected, a)
+
+    def test_1000_example(self):
+        tmpl = list(range(0, 1000))
         a = tmpl[:]
         random.shuffle(a)
         expected = tmpl[:]