diff --git a/Tests/test_file_gif.py b/Tests/test_file_gif.py
index 0111d3965..12e12b2f3 100644
--- a/Tests/test_file_gif.py
+++ b/Tests/test_file_gif.py
@@ -35,12 +35,12 @@ class TestFileGif(PillowTestCase):
         self.assertEqual(test(0), 800)
         self.assertEqual(test(1), 38)
 
-    def test_optimize_full_L(self):
+    def test_optimize_full_l(self):
         from io import BytesIO
 
         im = Image.frombytes("L", (16, 16), bytes(range(256)))
         file = BytesIO()
-        im.save(file, "GIF", optimize=optimize)
+        im.save(file, "GIF", optimize=True)
         self.assertEqual(im.mode, "L")
 
     def test_roundtrip(self):