diff --git a/django/contrib/gis/geos/libgeos.py b/django/contrib/gis/geos/libgeos.py
index a4f5adf4d0..aed6cf366c 100644
--- a/django/contrib/gis/geos/libgeos.py
+++ b/django/contrib/gis/geos/libgeos.py
@@ -110,7 +110,7 @@ def geos_version_info():
     is a release candidate (and what number release candidate), and the C API
     version.
     """
-    ver = geos_version()
+    ver = geos_version().decode()
     m = version_regex.match(ver)
     if not m: raise GEOSException('Could not parse version info string "%s"' % ver)
     return dict((key, m.group(key)) for key in ('version', 'release_candidate', 'capi_version', 'major', 'minor', 'subminor'))
diff --git a/django/contrib/gis/geos/mutable_list.py b/django/contrib/gis/geos/mutable_list.py
index 69e50e6b3f..820cdfa5a4 100644
--- a/django/contrib/gis/geos/mutable_list.py
+++ b/django/contrib/gis/geos/mutable_list.py
@@ -215,15 +215,18 @@ class ListMixin(object):
         "Standard list reverse method"
         self[:] = self[-1::-1]
 
-    def sort(self, cmp=cmp, key=None, reverse=False):
+    def sort(self, cmp=None, key=None, reverse=False):
         "Standard list sort method"
         if key:
             temp = [(key(v),v) for v in self]
-            temp.sort(cmp=cmp, key=lambda x: x[0], reverse=reverse)
+            temp.sort(key=lambda x: x[0], reverse=reverse)
             self[:] = [v[1] for v in temp]
         else:
             temp = list(self)
-            temp.sort(cmp=cmp, reverse=reverse)
+            if cmp is not None:
+                temp.sort(cmp=cmp, reverse=reverse)
+            else:
+                temp.sort(reverse=reverse)
             self[:] = temp
 
     ### Private routines ###
diff --git a/django/contrib/gis/geos/tests/__init__.py b/django/contrib/gis/geos/tests/__init__.py
index ccf960c68f..6b715d8c59 100644
--- a/django/contrib/gis/geos/tests/__init__.py
+++ b/django/contrib/gis/geos/tests/__init__.py
@@ -16,7 +16,8 @@ test_suites = [
 def suite():
     "Builds a test suite for the GEOS tests."
     s = TestSuite()
-    map(s.addTest, test_suites)
+    for suite in test_suites:
+        s.addTest(suite)
     return s
 
 def run(verbosity=1):