diff --git a/tests/unit-tests/crypto-helpers.t.cpp b/tests/unit-tests/crypto-helpers.t.cpp
index 5834382..5f29a03 100644
--- a/tests/unit-tests/crypto-helpers.t.cpp
+++ b/tests/unit-tests/crypto-helpers.t.cpp
@@ -305,13 +305,23 @@
   const uint8_t key[] = {0xbc, 0x22, 0xf3, 0xf0, 0x5c, 0xc4, 0x0d, 0xb9,
                          0x31, 0x1e, 0x41, 0x92, 0x96, 0x6f, 0xee, 0x92};
   const std::string plaintext = "alongstringalongstringalongstringalongstringalongstringalongstringalongstringalongstring";
+  const std::string plaintext2 = "shortstring";
   const std::string associatedData = "right";
   const std::string wrongAssociatedData = "wrong";
   uint32_t counter = 0;
+  // long string encryption
   auto block = encodeBlockWithAesGcm128(ndn::tlv::Content, key, (uint8_t*)plaintext.c_str(), plaintext.size(),
                                         (uint8_t*)associatedData.c_str(), associatedData.size(), counter);
   auto decoded = decodeBlockWithAesGcm128(block, key, (uint8_t*)associatedData.c_str(), associatedData.size());
   BOOST_CHECK_EQUAL(plaintext, std::string(decoded.get<char>(), decoded.size()));
+
+  // short string encryption
+  block = encodeBlockWithAesGcm128(ndn::tlv::Content, key, (uint8_t*)plaintext2.c_str(), plaintext2.size(),
+                                   (uint8_t*)associatedData.c_str(), associatedData.size(), counter);
+  decoded = decodeBlockWithAesGcm128(block, key, (uint8_t*)associatedData.c_str(), associatedData.size());
+  BOOST_CHECK_EQUAL(plaintext2, std::string(decoded.get<char>(), decoded.size()));
+
+  // use wrong associated data
   BOOST_CHECK_THROW(decodeBlockWithAesGcm128(block, key,
                                              (uint8_t*)wrongAssociatedData.c_str(),
                                              wrongAssociatedData.size()), std::runtime_error);