diff --git a/tests/unit/dataclasses/test_library.py b/tests/unit/dataclasses/test_library.py
index cc84efde4..2be88c976 100644
--- a/tests/unit/dataclasses/test_library.py
+++ b/tests/unit/dataclasses/test_library.py
@@ -76,6 +76,17 @@ def test_load_library_from_ontology(bm: BuildingMOTIF):
     assert len(shapeg.graph) > 1
 
 
+def test_load_library_from_ontology_with_error(bm: BuildingMOTIF):
+    with pytest.raises(Exception):
+        Library.load(ontology_graph="tests/unit/fixtures/bad_shape_template.ttl")
+
+
+def test_load_shapes_with_directory_library(bm: BuildingMOTIF):
+    lib = Library.load(directory="tests/unit/fixtures/shapes")
+    assert lib is not None
+    assert len(lib.get_templates()) == 1
+
+
 def test_load_library_from_directory(bm: BuildingMOTIF):
     lib = Library.load(directory="tests/unit/fixtures/templates")
     assert lib is not None
diff --git a/tests/unit/fixtures/bad_shape_template.ttl b/tests/unit/fixtures/bad_shape_template.ttl
new file mode 100644
index 000000000..33d09dd6e
--- /dev/null
+++ b/tests/unit/fixtures/bad_shape_template.ttl
@@ -0,0 +1,17 @@
+@prefix brick: <https://brickschema.org/schema/Brick#> .
+@prefix owl: <http://www.w3.org/2002/07/owl#> .
+@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
+@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
+@prefix sh: <http://www.w3.org/ns/shacl#> .
+@prefix : <urn:shape1/> .
+
+: a owl:Ontology .
+
+:vav_shape a sh:NodeShape ;
+    sh:targetClass brick:VAV ;
+    sh:property [
+        sh:qualifiedValueShape [ sh:class brick:Air_Flow_Sensor ] ;
+        sh:qualifiedMinCount 1 ;
+        sh:minCount 1;
+    ] ;
+.
diff --git a/tests/unit/fixtures/shapes/shape1.ttl b/tests/unit/fixtures/shapes/shape1.ttl
index d14097af9..8ec47229f 100644
--- a/tests/unit/fixtures/shapes/shape1.ttl
+++ b/tests/unit/fixtures/shapes/shape1.ttl
@@ -7,7 +7,7 @@
 
 : a owl:Ontology .
 
-:vav_shape a sh:NodeShape ;
+:vav_shape a owl:Class, sh:NodeShape ;
     sh:targetClass brick:VAV ;
     sh:property [
         sh:path brick:hasPoint ;