diff --git a/ontology/uco/core/core.ttl b/ontology/uco/core/core.ttl
index e4bf1777..8bd191fb 100644
--- a/ontology/uco/core/core.ttl
+++ b/ontology/uco/core/core.ttl
@@ -379,7 +379,7 @@ core:UcoInherentCharacterizationThing
 
 core:UcoInherentCharacterizationThing-disjointWith-UcoObject-shape
 	a sh:NodeShape ;
-	sh:message "observable:UcoInherentCharacterizationThing and observable:UcoObject are disjoint classes.  Assigning both types to a single node will be an error in UCO 2.0.0."@en ;
+	sh:message "core:UcoInherentCharacterizationThing and core:UcoObject are disjoint classes.  Assigning both types to a single node will be an error in UCO 2.0.0."@en ;
 	sh:not [
 		a sh:NodeShape ;
 		sh:class core:UcoObject ;
diff --git a/tests/examples/disjointedness_PASS_validation.ttl b/tests/examples/disjointedness_PASS_validation.ttl
index c88a7234..02ba4683 100644
--- a/tests/examples/disjointedness_PASS_validation.ttl
+++ b/tests/examples/disjointedness_PASS_validation.ttl
@@ -11,7 +11,7 @@
 	sh:result [
 		a sh:ValidationResult ;
 		sh:focusNode <http://example.org/kb/File-33a25932-3a1a-4828-a90f-d31818b495ce> ;
-		sh:resultMessage "observable:UcoInherentCharacterizationThing and observable:UcoObject are disjoint classes.  Assigning both types to a single node will be an error in UCO 2.0.0."@en ;
+		sh:resultMessage "core:UcoInherentCharacterizationThing and core:UcoObject are disjoint classes.  Assigning both types to a single node will be an error in UCO 2.0.0."@en ;
 		sh:resultSeverity sh:Warning ;
 		sh:sourceConstraintComponent sh:NotConstraintComponent ;
 		sh:sourceShape core:UcoInherentCharacterizationThing-disjointWith-UcoObject-shape ;