diff --git a/src/test/groovy/net/fortuna/ical4j/extensions/concept/ActionTypeTest.groovy b/src/test/groovy/net/fortuna/ical4j/extensions/concept/ActionTypeTest.groovy
index af90c62..ed1ee58 100644
--- a/src/test/groovy/net/fortuna/ical4j/extensions/concept/ActionTypeTest.groovy
+++ b/src/test/groovy/net/fortuna/ical4j/extensions/concept/ActionTypeTest.groovy
@@ -16,7 +16,7 @@ class ActionTypeTest extends Specification {
         expect: 'string matches expected value'
         toDo as String ==~ /BEGIN:VTODO\r
 SUMMARY:My new agenda\r
-CONCEPT:ical4j:concept:action:agenda\r
+CONCEPT:semcal:concept:action:agenda\r
 END:VTODO\r\n/
     }
 }