diff --git a/skimage/novice/tests/test_novice.py b/skimage/novice/tests/test_novice.py
index a1f750ab..02d5c7a8 100644
--- a/skimage/novice/tests/test_novice.py
+++ b/skimage/novice/tests/test_novice.py
@@ -143,14 +143,14 @@ def test_update_on_save():
     assert pic.modified
     assert pic.path is None
 
-    fd, filename = tempfile.mkstemp(suffix=".jpg")
+    fd, filename = tempfile.mkstemp(suffix=".png")
     os.close(fd)
     try:
         pic.save(filename)
 
         assert not pic.modified
         assert_equal(pic.path, os.path.abspath(filename))
-        assert_equal(pic.format, "jpeg")
+        assert_equal(pic.format, "png")
     finally:
         os.unlink(filename)