diff --git a/ndsl/stencils/testing/conftest.py b/ndsl/stencils/testing/conftest.py
index 2ed29e37..1e5f41f7 100644
--- a/ndsl/stencils/testing/conftest.py
+++ b/ndsl/stencils/testing/conftest.py
@@ -75,12 +75,6 @@ def pytest_addoption(parser: pytest.Parser) -> None:
         default=1,
         help="How many indices of failures to print from worst to best. Default to 1.",
     )
-    parser.addoption(
-        "--no_legacy_namelist",
-        action="store_true",
-        default=False,
-        help="Temporary flag introduced as part of  NDSL issue #64. No functionality. Soon to be removed.",
-    )
     parser.addoption(
         "--grid",
         action="store",