diff --git a/tests/unit/face.t.cpp b/tests/unit/face.t.cpp
index c4ae026..f369d6f 100644
--- a/tests/unit/face.t.cpp
+++ b/tests/unit/face.t.cpp
@@ -44,7 +44,7 @@
     : face(m_io, m_keyChain, {true, !std::is_same_v<PrefixRegReply, NoPrefixRegReply>})
   {
     static_assert(std::is_same_v<PrefixRegReply, WantPrefixRegReply> ||
-                  std::is_same_v<PrefixRegReply, NoPrefixRegReply>, "");
+                  std::is_same_v<PrefixRegReply, NoPrefixRegReply>);
   }
 
   /** \brief Execute a prefix registration, and optionally check the name in callback.
diff --git a/tests/unit/interest.t.cpp b/tests/unit/interest.t.cpp
index bd6e302..73b7bef 100644
--- a/tests/unit/interest.t.cpp
+++ b/tests/unit/interest.t.cpp
@@ -31,6 +31,7 @@
 BOOST_CONCEPT_ASSERT((WireDecodable<Interest>));
 static_assert(std::is_convertible_v<Interest::Error*, tlv::Error*>,
               "Interest::Error must inherit from tlv::Error");
+BOOST_CONCEPT_ASSERT((boost::EqualityComparable<Interest::Nonce>));
 
 BOOST_AUTO_TEST_SUITE(TestInterest)
 
diff --git a/tests/unit/metadata-object.t.cpp b/tests/unit/metadata-object.t.cpp
index 480f7d4..0cbe737 100644
--- a/tests/unit/metadata-object.t.cpp
+++ b/tests/unit/metadata-object.t.cpp
@@ -26,6 +26,9 @@
 
 namespace ndn::tests {
 
+static_assert(std::is_convertible_v<MetadataObject::Error*, tlv::Error*>,
+              "MetadataObject::Error must inherit from tlv::Error");
+
 class MetadataObjectFixture : public KeyChainFixture
 {
 public:
diff --git a/tests/unit/name-component.t.cpp b/tests/unit/name-component.t.cpp
index d72de0f..d4b674d 100644
--- a/tests/unit/name-component.t.cpp
+++ b/tests/unit/name-component.t.cpp
@@ -35,7 +35,9 @@
 using ndn::name::Component;
 using ndn::name::UriFormat;
 
+static_assert(sizeof(Component) == sizeof(Block));
 BOOST_CONCEPT_ASSERT((boost::EqualityComparable<Component>));
+BOOST_CONCEPT_ASSERT((boost::Comparable<Component>));
 BOOST_CONCEPT_ASSERT((WireEncodable<Component>));
 BOOST_CONCEPT_ASSERT((WireEncodableWithEncodingBuffer<Component>));
 BOOST_CONCEPT_ASSERT((WireDecodable<Component>));
diff --git a/tests/unit/name.t.cpp b/tests/unit/name.t.cpp
index da95aed..734edb7 100644
--- a/tests/unit/name.t.cpp
+++ b/tests/unit/name.t.cpp
@@ -31,6 +31,7 @@
 using ndn::name::Component;
 
 BOOST_CONCEPT_ASSERT((boost::EqualityComparable<Name>));
+BOOST_CONCEPT_ASSERT((boost::Comparable<Name>));
 BOOST_CONCEPT_ASSERT((WireEncodable<Name>));
 BOOST_CONCEPT_ASSERT((WireEncodableWithEncodingBuffer<Name>));
 BOOST_CONCEPT_ASSERT((WireDecodable<Name>));
diff --git a/tests/unit/prefix-announcement.t.cpp b/tests/unit/prefix-announcement.t.cpp
index a13e9f5..a36f084 100644
--- a/tests/unit/prefix-announcement.t.cpp
+++ b/tests/unit/prefix-announcement.t.cpp
@@ -27,6 +27,10 @@
 
 namespace ndn::tests {
 
+BOOST_CONCEPT_ASSERT((boost::EqualityComparable<PrefixAnnouncement>));
+static_assert(std::is_convertible_v<PrefixAnnouncement::Error*, tlv::Error*>,
+              "PrefixAnnouncement::Error must inherit from tlv::Error");
+
 BOOST_AUTO_TEST_SUITE(TestPrefixAnnouncement)
 
 static Data
diff --git a/tests/unit/security/pib/identity.t.cpp b/tests/unit/security/pib/identity.t.cpp
index 70252d9..42a9916 100644
--- a/tests/unit/security/pib/identity.t.cpp
+++ b/tests/unit/security/pib/identity.t.cpp
@@ -29,6 +29,8 @@
 
 using namespace ndn::security::pib;
 
+BOOST_CONCEPT_ASSERT((boost::EqualityComparable<Identity>));
+
 BOOST_AUTO_TEST_SUITE(Security)
 BOOST_FIXTURE_TEST_SUITE(TestIdentity, PibDataFixture)
 
diff --git a/tests/unit/security/pib/key.t.cpp b/tests/unit/security/pib/key.t.cpp
index 5273436..a3c1806 100644
--- a/tests/unit/security/pib/key.t.cpp
+++ b/tests/unit/security/pib/key.t.cpp
@@ -29,6 +29,8 @@
 
 using namespace ndn::security::pib;
 
+BOOST_CONCEPT_ASSERT((boost::EqualityComparable<Key>));
+
 BOOST_AUTO_TEST_SUITE(Security)
 BOOST_FIXTURE_TEST_SUITE(TestKey, PibDataFixture)
 
diff --git a/tests/unit/util/ostream-joiner.t.cpp b/tests/unit/util/ostream-joiner.t.cpp
index 2e7ac8f..4ac3381 100644
--- a/tests/unit/util/ostream-joiner.t.cpp
+++ b/tests/unit/util/ostream-joiner.t.cpp
@@ -37,7 +37,7 @@
 
   auto joiner1 = ostream_joiner<char>(os, ' ');
   auto joiner2 = make_ostream_joiner(os, ' ');
-  static_assert(std::is_same_v<decltype(joiner1), decltype(joiner2)>, "");
+  static_assert(std::is_same_v<decltype(joiner1), decltype(joiner2)>);
 
   std::vector<int> v(5);
   std::iota(v.begin(), v.end(), 1);
diff --git a/tests/unit/version.t.cpp b/tests/unit/version.t.cpp
index 527bc95..4b551a9 100644
--- a/tests/unit/version.t.cpp
+++ b/tests/unit/version.t.cpp
@@ -37,9 +37,9 @@
                                 NDN_CXX_VERSION_MINOR * 1000 +
                                 NDN_CXX_VERSION_PATCH);
 
-  static_assert(NDN_CXX_VERSION_MAJOR < 1000, "");
-  static_assert(NDN_CXX_VERSION_MINOR < 1000, "");
-  static_assert(NDN_CXX_VERSION_PATCH < 1000, "");
+  static_assert(NDN_CXX_VERSION_MAJOR < 1000);
+  static_assert(NDN_CXX_VERSION_MINOR < 1000);
+  static_assert(NDN_CXX_VERSION_PATCH < 1000);
 }
 
 BOOST_AUTO_TEST_CASE(VersionString)