diff --git a/pudb/test/test_lowlevel.py b/pudb/test/test_lowlevel.py
index da7b5bd8..d6233a18 100644
--- a/pudb/test/test_lowlevel.py
+++ b/pudb/test/test_lowlevel.py
@@ -91,7 +91,8 @@ def main():
         1,
         335
     }
-    if sys.version_info < (3, 12):
+    if sys.version_info < (3, 10):
+        # if co_lines is unavailable, we appear to see these
         expected.update([
             128,  # bogus,
             255,  # bogus,