diff --git a/.travis.yml b/.travis.yml
index 38e085f5a..6589f7725 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -13,7 +13,7 @@ before_install:
  - sudo apt-get install -qq make libboost-dev libboost-filesystem-dev libboost-program-options-dev libboost-python-dev libboost-regex-dev libboost-system-dev libboost-thread-dev python-nose libicu-dev libpng-dev libjpeg-dev libtiff-dev libwebp-dev libz-dev libfreetype6-dev libxml2-dev libproj-dev libcairo-dev python-cairo-dev libsqlite3-dev postgresql-server-dev*
 
 script:
- - ./configure CXX=${CXX} CC=${CC} DEBUG=True DEMO=False BINDINGS='python' CPP_TESTS=True CAIRO=True FAST=True && JOBS=2 make
+ - ./configure CXX=${CXX} CC=${CC} DEBUG=False DEMO=False BINDINGS='python' CPP_TESTS=True CAIRO=True FAST=True && JOBS=2 make
  - make test-local
 
 notifications:
diff --git a/tests/python_tests/images/support/mapnik-wgs842merc-reprojection-render.png b/tests/python_tests/images/support/mapnik-wgs842merc-reprojection-render.png
index 6a8094948..26da9fad9 100644
Binary files a/tests/python_tests/images/support/mapnik-wgs842merc-reprojection-render.png and b/tests/python_tests/images/support/mapnik-wgs842merc-reprojection-render.png differ
diff --git a/tests/python_tests/reprojection_test.py b/tests/python_tests/reprojection_test.py
index 14a48adf7..371ed217e 100644
--- a/tests/python_tests/reprojection_test.py
+++ b/tests/python_tests/reprojection_test.py
@@ -44,9 +44,9 @@ if 'shape' in mapnik.DatasourceCache.plugin_names():
         mapnik.render(m,im)
         actual = '/tmp/mapnik-wgs842merc-reprojection-render.png'
         expected = 'images/support/mapnik-wgs842merc-reprojection-render.png'
-        im.save(actual)
+        im.save(actual,'png32')
         expected_im = mapnik.Image.open(expected)
-        eq_(im.tostring(),expected_im.tostring(), 'failed comparing actual (%s) and expected (%s)' % (actual,'tests/python_tests/'+ expected))
+        eq_(im.tostring('png32'),expected_im.tostring('png32'), 'failed comparing actual (%s) and expected (%s)' % (actual,'tests/python_tests/'+ expected))
 
     def test_visual_zoom_all_rendering2():
         m = mapnik.Map(512,512)
@@ -56,9 +56,9 @@ if 'shape' in mapnik.DatasourceCache.plugin_names():
         mapnik.render(m,im)
         actual = '/tmp/mapnik-merc2wgs84-reprojection-render.png'
         expected = 'images/support/mapnik-merc2wgs84-reprojection-render.png'
-        im.save(actual)
+        im.save(actual,'png32')
         expected_im = mapnik.Image.open(expected)
-        eq_(im.tostring(),expected_im.tostring(), 'failed comparing actual (%s) and expected (%s)' % (actual,'tests/python_tests/'+ expected))
+        eq_(im.tostring('png32'),expected_im.tostring('png32'), 'failed comparing actual (%s) and expected (%s)' % (actual,'tests/python_tests/'+ expected))
 
     # maximum-extent read from map.xml
     def test_visual_zoom_all_rendering3():
@@ -69,9 +69,9 @@ if 'shape' in mapnik.DatasourceCache.plugin_names():
         mapnik.render(m,im)
         actual = '/tmp/mapnik-merc2merc-reprojection-render1.png'
         expected = 'images/support/mapnik-merc2merc-reprojection-render1.png'
-        im.save(actual)
+        im.save(actual,'png32')
         expected_im = mapnik.Image.open(expected)
-        eq_(im.tostring(),expected_im.tostring(), 'failed comparing actual (%s) and expected (%s)' % (actual,'tests/python_tests/'+ expected))
+        eq_(im.tostring('png32'),expected_im.tostring('png32'), 'failed comparing actual (%s) and expected (%s)' % (actual,'tests/python_tests/'+ expected))
 
     # no maximum-extent
     def test_visual_zoom_all_rendering4():
@@ -83,9 +83,9 @@ if 'shape' in mapnik.DatasourceCache.plugin_names():
         mapnik.render(m,im)
         actual = '/tmp/mapnik-merc2merc-reprojection-render2.png'
         expected = 'images/support/mapnik-merc2merc-reprojection-render2.png'
-        im.save(actual)
+        im.save(actual,'png32')
         expected_im = mapnik.Image.open(expected)
-        eq_(im.tostring(),expected_im.tostring(), 'failed comparing actual (%s) and expected (%s)' % (actual,'tests/python_tests/'+ expected))
+        eq_(im.tostring('png32'),expected_im.tostring('png32'), 'failed comparing actual (%s) and expected (%s)' % (actual,'tests/python_tests/'+ expected))
 
 if __name__ == "__main__":
     setup()