diff --git a/tests/test_sp3.py b/tests/test_sp3.py
index e357519..e15897c 100644
--- a/tests/test_sp3.py
+++ b/tests/test_sp3.py
@@ -288,12 +288,6 @@ def test_trim_df(self, mock_file):
             "Should be two epochs after trimming with keep_first_delta_amount parameter",
         )
 
-    # Don't bother trying to unit test transform_df(). It is a wrapper which basically does:
-    # - read (parse)
-    # - apply function
-    # - write (generate content)
-    # TODO notes added above to implement those bits separately
-
 
 class TestMergeSP3(TestCase):
     def setUp(self):