diff --git a/cwl_utils/expression_refactor.py b/cwl_utils/expression_refactor.py
index 038b9539..6dd675d6 100755
--- a/cwl_utils/expression_refactor.py
+++ b/cwl_utils/expression_refactor.py
@@ -112,7 +112,7 @@ def refactor(args: argparse.Namespace) -> int:
     """Primary processing loop."""
     return_code = 0
     yaml = YAML(typ="rt")
-    yaml.preserve_quotes = True  # type: ignore[assignment]
+    yaml.preserve_quotes = True
     for document in args.inputs:
         _logger.info("Processing %s.", document)
         with open(document) as doc_handle:
diff --git a/cwl_utils/graph_split.py b/cwl_utils/graph_split.py
index 861115e0..e37e7b04 100755
--- a/cwl_utils/graph_split.py
+++ b/cwl_utils/graph_split.py
@@ -89,7 +89,7 @@ def graph_split(
 ) -> None:
     """Loop over the provided packed CWL document and split it up."""
     yaml = YAML(typ="rt")
-    yaml.preserve_quotes = True  # type: ignore[assignment]
+    yaml.preserve_quotes = True
     source = yaml.load(sourceIO)
     add_lc_filename(source, sourceIO.name)
 
@@ -255,8 +255,8 @@ def yaml_dump(entry: Any, output_file: str, pretty: bool) -> None:
     """Output object as YAML."""
     yaml = YAML(typ="rt")
     yaml.default_flow_style = False
-    yaml.map_indent = 4  # type: ignore[assignment]
-    yaml.sequence_indent = 2  # type: ignore[assignment]
+    yaml.map_indent = 4
+    yaml.sequence_indent = 2
     with open(output_file, "w", encoding="utf-8") as result_handle:
         if pretty:
             result_handle.write(stringify_dict(entry))
diff --git a/tests/test_parser.py b/tests/test_parser.py
index 603f2e63..306e3816 100644
--- a/tests/test_parser.py
+++ b/tests/test_parser.py
@@ -24,7 +24,7 @@
 )
 TEST_v1_2_CWL = get_data("testdata/workflow_input_format_expr_v1_2.cwl")
 yaml = YAML(typ="rt")
-yaml.preserve_quotes = True  # type: ignore[assignment]
+yaml.preserve_quotes = True
 
 
 def test_cwl_version() -> None: