diff --git a/src/serena/util/file_system.py b/src/serena/util/file_system.py
index e4195aec..0999aef1 100644
--- a/src/serena/util/file_system.py
+++ b/src/serena/util/file_system.py
@@ -76,8 +76,10 @@ def find_all_non_ignored_files(repo_root: str) -> list[str]:
     :return: A list of all non-ignored files in the repository
     """
     gitignore_parser = GitignoreParser(repo_root)
-    _, files = scan_directory(repo_root, recursive=True)
-    return [file for file in files if not gitignore_parser.should_ignore(file)]
+    _, files = scan_directory(
+        repo_root, recursive=True, is_ignored_dir=gitignore_parser.should_ignore, is_ignored_file=gitignore_parser.should_ignore
+    )
+    return files
 
 
 @dataclass
diff --git a/src/serena/util/inspection.py b/src/serena/util/inspection.py
index 4a859c1f..668cf545 100644
--- a/src/serena/util/inspection.py
+++ b/src/serena/util/inspection.py
@@ -19,7 +19,7 @@ def iter_subclasses(cls: type[T], recursive: bool = True) -> Generator[type[T],
             yield from iter_subclasses(subclass, recursive)
 
 
-def determine_programming_language_composition(repo_path: str, rel_path_to_gitignore: str = ".gitignore") -> dict[str, float]:
+def determine_programming_language_composition(repo_path: str) -> dict[str, float]:
     """
     Determine the programming language composition of a repository.