diff --git a/tests/Makefile b/tests/Makefile
index af381d7..42b96e8 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -39,8 +39,8 @@ all: \
 	touch $@
 
 .pytest.done.log: \
-  $(profile_ttls) \
   exemplars.ttl \
+  monolithic.ttl \
   test_exemplar_coverage.py
 	source $(top_srcdir)/venv/bin/activate \
 	  && pytest \
diff --git a/tests/test_exemplar_coverage.py b/tests/test_exemplar_coverage.py
index 733104d..b5388a5 100644
--- a/tests/test_exemplar_coverage.py
+++ b/tests/test_exemplar_coverage.py
@@ -37,6 +37,7 @@ def test_exemplar_coverage() -> None:
     """
     exemplar_graph = Graph()
     profile_graph = Graph()
+    tbox_graph = Graph()
     combined_graph = Graph()
 
     for filepath in (top_srcdir / "ontology").iterdir():
@@ -48,12 +49,15 @@ def test_exemplar_coverage() -> None:
             profile_graph.parse(filepath)
     logging.debug("len(profile_graph) = %d.", len(profile_graph))
 
+    monolithic_filepath = srcdir / "monolithic.ttl"
+    tbox_graph.parse(monolithic_filepath)
+
     exemplar_filepath = srcdir / "exemplars.ttl"
     logging.debug("Loading exemplars graph %r.", exemplar_filepath)
     exemplar_graph.parse(exemplar_filepath)
     logging.debug("len(exemplar_graph) = %d.", len(exemplar_graph))
 
-    combined_graph = exemplar_graph + profile_graph
+    combined_graph = exemplar_graph + tbox_graph
 
     classes_mapped: Set[URIRef] = set()
     classes_with_exemplars: Set[URIRef] = set()