diff --git a/func_adl_uproot/transformer.py b/func_adl_uproot/transformer.py
index 6a5855c..00b5a38 100644
--- a/func_adl_uproot/transformer.py
+++ b/func_adl_uproot/transformer.py
@@ -438,7 +438,9 @@ def visit_Call(self, node):
                 + "(logging.getLogger(__name__).info('Using treename='"
                 + ' + repr(tree_name_to_use)),'
                 + ' uproot.dask({input_file: tree_name_to_use'
-                + ' for input_file in input_files}, filter_branch=' + branch_filter_name + '))[1])'
+                + ' for input_file in input_files}, filter_branch='
+                + branch_filter_name
+                + '))[1])'
                 + '('
                 + source_rep
                 + ', '
diff --git a/func_adl_uproot/translation.py b/func_adl_uproot/translation.py
index 1d618fe..b9b21b5 100644
--- a/func_adl_uproot/translation.py
+++ b/func_adl_uproot/translation.py
@@ -6,7 +6,10 @@
 from .transformer import branch_filter_name, input_filenames_argument_name, tree_name_argument_name
 
 # Adapted from https://github.com/CoffeaTeam/coffea/blob/v2024.4.0/src/coffea/util.py#L217-L248
-remove_not_interpretable_source = '''    def ''' + branch_filter_name + '''(branch):
+remove_not_interpretable_source = (
+    '    def '
+    + branch_filter_name
+    + '''(branch):
         if isinstance(branch.interpretation, uproot.interpretation.identify.uproot.AsGrouped):
             for name, interpretation in branch.interpretation.subbranches.items():
                 if isinstance(
@@ -32,6 +35,7 @@
             return True
 
 '''
+)
 
 
 def python_ast_to_python_source(python_ast):