diff --git a/tests/unit-tests/security/transform.t.cpp b/tests/unit-tests/security/transform.t.cpp
index 6999df4..ea2fa0f 100644
--- a/tests/unit-tests/security/transform.t.cpp
+++ b/tests/unit-tests/security/transform.t.cpp
@@ -46,6 +46,18 @@
 
   transform::StreamSink* streamSink = nullptr;
   BOOST_CHECK(streamSink == nullptr);
+
+  transform::HexEncode* hexEncode = nullptr;
+  BOOST_CHECK(hexEncode == nullptr);
+
+  transform::HexDecode* hexDecode = nullptr;
+  BOOST_CHECK(hexDecode == nullptr);
+
+  transform::Base64Encode* base64Encode = nullptr;
+  BOOST_CHECK(base64Encode == nullptr);
+
+  transform::Base64Decode* base64Decode = nullptr;
+  BOOST_CHECK(base64Decode == nullptr);
 }
 
 BOOST_AUTO_TEST_SUITE_END() // TestTransform