diff --git a/tests/unit-tests/security/digest-sha256.t.cpp b/tests/unit-tests/security/digest-sha256.t.cpp
index 7855058..f3d7bb7 100644
--- a/tests/unit-tests/security/digest-sha256.t.cpp
+++ b/tests/unit-tests/security/digest-sha256.t.cpp
@@ -41,7 +41,7 @@
   char content[6] = "1234\n";
   ConstBufferPtr buf = util::Sha256::computeDigest(reinterpret_cast<uint8_t*>(content), 5);
 
-  BOOST_CHECK_EQUAL(toHex(buf->buf(), buf->size(), false),
+  BOOST_CHECK_EQUAL(toHex(buf->data(), buf->size(), false),
                     "a883dafc480d466ee04e0d6da986bd78eb1fdd2178d04693723da3a8f95d42f4");
 }