diff --git a/tests/unit/security/validator-fixture.cpp b/tests/unit/security/validator-fixture.cpp
index 5d50794..8048fc4 100644
--- a/tests/unit/security/validator-fixture.cpp
+++ b/tests/unit/security/validator-fixture.cpp
@@ -36,8 +36,12 @@
   processInterest = [this] (const Interest& interest) {
     auto cert = cache.find(interest);
     if (cert != nullptr) {
+      BOOST_TEST_MESSAGE("ValidatorFixture processInterest " << interest << " reply " << cert->getName());
       face.receive(*cert);
     }
+    else {
+      BOOST_TEST_MESSAGE("ValidatorFixture processInterest " << interest << " no reply");
+    }
   };
 }