diff --git a/tests/unittest/test_file_filter.py b/tests/unittest/test_file_filter.py
index b35e351f..064290f3 100644
--- a/tests/unittest/test_file_filter.py
+++ b/tests/unittest/test_file_filter.py
@@ -80,3 +80,27 @@ class TestIgnoreFilter:
 
         filtered_files = filter_ignored(files)
         assert filtered_files == expected, f"Expected {[file.filename for file in expected]}, but got {[file.filename for file in filtered_files]}."
+    
+    def test_language_framework_ignores(self, monkeypatch):
+        """
+        Test files are ignored based on language/framework mapping (e.g., protobuf).
+        """
+        monkeypatch.setattr(global_settings.config, 'ignore_language_framework', ['protobuf', 'go_gen'])
+
+        files = [
+            type('', (object,), {'filename': 'main.go'})(),
+            type('', (object,), {'filename': 'dir1/service.pb.go'})(),
+            type('', (object,), {'filename': 'dir1/dir/data_pb2.py'})(),
+            type('', (object,), {'filename': 'file.py'})(),
+            type('', (object,), {'filename': 'dir2/file_gen.go'})()
+        ]
+        expected = [
+            files[0],
+            files[3]
+        ]
+
+        filtered = filter_ignored(files)
+        assert filtered == expected, (
+            f"Expected {[f.filename for f in expected]}, "
+            f"but got {[f.filename for f in filtered]}"
+        )