diff --git a/src/utils.py b/src/utils.py
index b6aeb8df8..e570633fb 100644
--- a/src/utils.py
+++ b/src/utils.py
@@ -31,8 +31,6 @@
 Simple utility functions.
 """
 
-
-
 import supybot.fix as fix
 
 import os
@@ -94,13 +92,11 @@ def htmlToText(s, tagReplace=' '):
     x.feed(s)
     return x.getText()
 
-def eachSubstring(s):
-    """Returns every substring starting at the first index until the last."""
-    for i in xrange(1, len(s)+1):
-        yield s[:i]
-
 def abbrev(strings, d=None):
     """Returns a dictionary mapping unambiguous abbreviations to full forms."""
+    def eachSubstring(s):
+        for i in xrange(1, len(s)+1):
+            yield s[:i]
     if len(strings) != len(set(strings)):
         raise ValueError, \
               'strings given to utils.abbrev have duplicates: %r' % strings
diff --git a/test/test_utils.py b/test/test_utils.py
index e3e22b83d..d637b27a8 100644
--- a/test/test_utils.py
+++ b/test/test_utils.py
@@ -101,11 +101,6 @@ class UtilsTest(SupyTestCase):
     def timeElapsedShort(self):
         self.assertEqual(utils.timeElapsed(123, short=True), '2m 3s')
 
-    def testEachSubstring(self):
-        s = 'foobar'
-        L = ['f', 'fo', 'foo', 'foob', 'fooba', 'foobar']
-        self.assertEqual(list(utils.eachSubstring(s)), L)
-
     def testDistance(self):
         self.assertEqual(utils.distance('', ''), 0)
         self.assertEqual(utils.distance('a', 'b'), 1)