diff --git a/tests/input/credential-type-unmapped-fail.json b/tests/input/credential-type-unmapped-fail.json
index 30ba08b..b4c93e6 100644
--- a/tests/input/credential-type-unmapped-fail.json
+++ b/tests/input/credential-type-unmapped-fail.json
@@ -1,6 +1,7 @@
 {
   "@context": [
-    "https://www.w3.org/ns/credentials/v2"
+    "https://www.w3.org/ns/credentials/v2",
+    {"@vocab": null}
   ],
   "type": [
     "VerifiableCredential",