diff --git a/unit_tests/algorithms/string_util.cpp b/unit_tests/algorithms/string_util.cpp
new file mode 100644
index 000000000..6bbb119b8
--- /dev/null
+++ b/unit_tests/algorithms/string_util.cpp
@@ -0,0 +1,65 @@
+/*
+
+Copyright (c) 2014, Project OSRM contributors
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+Redistributions of source code must retain the above copyright notice, this list
+of conditions and the following disclaimer.
+Redistributions in binary form must reproduce the above copyright notice, this
+list of conditions and the following disclaimer in the documentation and/or
+other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+*/
+
+#include "../../util/string_util.hpp"
+
+#include <boost/test/unit_test.hpp>
+#include <boost/test/test_case_template.hpp>
+
+#include <iostream>
+
+BOOST_AUTO_TEST_SUITE(string_util)
+
+BOOST_AUTO_TEST_CASE(replace_all_test)
+{
+    std::string input {"ababababababa"};
+    const std::string sub {"a"};
+    const std::string other {"c"};
+    replaceAll(input, sub, other);
+
+    BOOST_CHECK_EQUAL(input, "cbcbcbcbcbcbc");
+}
+
+BOOST_AUTO_TEST_CASE(json_escaping)
+{
+    const std::string input {"\b\\"};
+    const std::string output { escape_JSON(input) };
+
+    BOOST_CHECK_EQUAL(output, "\\b\\\\");
+}
+
+BOOST_AUTO_TEST_CASE(print_int)
+{
+    const std::string input {"\b\\"};
+    char buffer[12];
+    buffer[11] = 0; // zero termination
+    std::string output = printInt<11, 8>(buffer, 314158976);
+
+    BOOST_CHECK_EQUAL(output, "3.14158976");
+}
+
+BOOST_AUTO_TEST_SUITE_END()