diff --git a/tests/unit/security/validator.t.cpp b/tests/unit/security/validator.t.cpp
index c87d348..faecf56 100644
--- a/tests/unit/security/validator.t.cpp
+++ b/tests/unit/security/validator.t.cpp
@@ -209,6 +209,7 @@
                         HierarchicalValidatorFixture<ValidationPolicySimpleHierarchyForInterestOnly>)
 {
   Interest interest("/Security/ValidatorFixture/Sub1/Sub2/Interest");
+  interest.setCanBePrefix(false);
   Data data("/Security/ValidatorFixture/Sub1/Sub2/Interest");
 
   VALIDATE_FAILURE(interest, "Unsigned");
@@ -217,6 +218,7 @@
   face.sentInterests.clear();
 
   interest = Interest("/Security/ValidatorFixture/Sub1/Sub2/Interest");
+  interest.setCanBePrefix(false);
   m_keyChain.sign(interest, signingWithSha256());
   m_keyChain.sign(data, signingWithSha256());
   VALIDATE_FAILURE(interest, "Required KeyLocator/Name missing (not passed to policy)");