diff --git a/include/engine/base64.hpp b/include/engine/base64.hpp
index 811ef9308..30fcb5b78 100644
--- a/include/engine/base64.hpp
+++ b/include/engine/base64.hpp
@@ -14,6 +14,9 @@
 #include <cstdint>
 #include <climits>
 
+// RFC 4648 "The Base16, Base32, and Base64 Data Encodings"
+// See: https://tools.ietf.org/html/rfc4648
+
 namespace osrm
 {
 namespace engine
diff --git a/unit_tests/engine/base64.cpp b/unit_tests/engine/base64.cpp
index 16749dc3f..63af7acc2 100644
--- a/unit_tests/engine/base64.cpp
+++ b/unit_tests/engine/base64.cpp
@@ -3,8 +3,23 @@
 #include <boost/test/unit_test.hpp>
 #include <boost/test/test_case_template.hpp>
 
+// RFC 4648 "The Base16, Base32, and Base64 Data Encodings"
 BOOST_AUTO_TEST_SUITE(base64)
 
+// For test vectors see section 10: https://tools.ietf.org/html/rfc4648#section-10
+BOOST_AUTO_TEST_CASE(rfc4648_test_vectors)
+{
+    using namespace osrm::engine;
+
+    BOOST_CHECK_EQUAL(encodeBase64(""), "");
+    BOOST_CHECK_EQUAL(encodeBase64("f"), "Zg==");
+    BOOST_CHECK_EQUAL(encodeBase64("fo"), "Zm8=");
+    BOOST_CHECK_EQUAL(encodeBase64("foo"), "Zm9v");
+    BOOST_CHECK_EQUAL(encodeBase64("foob"), "Zm9vYg==");
+    BOOST_CHECK_EQUAL(encodeBase64("fooba"), "Zm9vYmE=");
+    BOOST_CHECK_EQUAL(encodeBase64("foobar"), "Zm9vYmFy");
+}
+
 BOOST_AUTO_TEST_CASE(encoding) {}
 
 BOOST_AUTO_TEST_CASE(decoding) {}