diff --git a/test/roots/test-citation_label_special_chars/refs.bib b/test/roots/test-citation_label_special_chars/refs.bib
index 5c3eaafa..17982b49 100644
--- a/test/roots/test-citation_label_special_chars/refs.bib
+++ b/test/roots/test-citation_label_special_chars/refs.bib
@@ -1,12 +1,3 @@
-@book{Manning2008,
-  author = {Christopher D. Manning and Prabhakar Raghavan and Hinrich Sch\"utze},
-  title = {Introduction to Information Retrieval},
-  address = {Cambridge},
-  publisher = {Cambridge University Press},
-  year = {2008},
-  url = {https://nlp.stanford.edu/IR-book/},
-}
-
 @article{Serrano2009,
   author = {M. {\'A}ngeles Serrano and Mari{\'a}n Bogu{\~n}{\'a} and Alessandro Vespignani},
   title = {Extracting the multiscale backbone of complex weighted networks},
diff --git a/test/test_citation.py b/test/test_citation.py
index cd06890d..faad6762 100644
--- a/test/test_citation.py
+++ b/test/test_citation.py
@@ -534,5 +534,4 @@ def test_citation_label_special_chars(app, warning) -> None:
     app.build()
     assert not warning.getvalue()
     output = (app.outdir / "index.html").read_text(encoding="utf-8-sig")
-    assert len(html_citations(label="MRS08").findall(output)) == 1
     assert len(html_citations(label="SBV09").findall(output)) == 1