diff --git a/opencontractserver/tests/test_doc_parser.py b/opencontractserver/tests/test_doc_parser.py
index 4438d76e..f649b026 100644
--- a/opencontractserver/tests/test_doc_parser.py
+++ b/opencontractserver/tests/test_doc_parser.py
@@ -63,12 +63,6 @@ def create_mock_image(self, width: int, height: int) -> Image.Image:
         """Create a mock image with the given dimensions."""
         return Image.new("RGB", (width, height), color="red")
 
-    def image_to_bytes(self, image: Image.Image) -> bytes:
-        """Convert a PIL Image to bytes."""
-        img_byte_arr = io.BytesIO()
-        image.save(img_byte_arr, format="PNG")
-        return img_byte_arr.getvalue()
-
     @patch("opencontractserver.tasks.doc_tasks.convert_from_bytes")
     def test_pdf_thumbnail_extraction(self, mock_convert_from_bytes):
         """Test PDF thumbnail extraction with various image sizes and orientations."""