diff --git a/src/img2pdf_test.py b/src/img2pdf_test.py
index f7e80f9..493ff7b 100755
--- a/src/img2pdf_test.py
+++ b/src/img2pdf_test.py
@@ -7150,7 +7150,7 @@ def test_return_engine_doc(tmp_path_factory):
     inputf = os.path.join(os.path.dirname(__file__), "tests", "input", "normal.jpg")
     outputf = tmp_path_factory.mktemp("return_engine_doc") / "normal.jpg.pdf"
     pdf_wrapper = img2pdf.convert_to_docobject(inputf, engine=img2pdf.Engine.pikepdf)
-    pdf = pdf.writer
+    pdf = pdf_wrapper.writer
     assert isinstance(pdf, pikepdf.Pdf)
     pdf.save(outputf, min_version=pdf_wrapper.output_version, linearize=True)
     assert os.path.isfile(outputf)