diff --git a/test/unittest/prettywritertest.cpp b/test/unittest/prettywritertest.cpp
index 9c22bd3..9be4f03 100644
--- a/test/unittest/prettywritertest.cpp
+++ b/test/unittest/prettywritertest.cpp
@@ -25,7 +25,7 @@
 
 using namespace rapidjson;
 
-static const char kJson[] = "{\"hello\":\"world\",\"t\":true,\"f\":false,\"n\":null,\"i\":123,\"pi\":3.1416,\"a\":[1,2,3]}";
+static const char kJson[] = "{\"hello\":\"world\",\"t\":true,\"f\":false,\"n\":null,\"i\":123,\"pi\":3.1416,\"a\":[1,2,3],\"u64\":1234567890123456789,\"i64\":-1234567890123456789}";
 
 TEST(PrettyWriter, Basic) {
     StringBuffer buffer;
@@ -45,7 +45,9 @@ TEST(PrettyWriter, Basic) {
         "        1,\n"
         "        2,\n"
         "        3\n"
-        "    ]\n"
+        "    ],\n"
+        "    \"u64\": 1234567890123456789,\n"
+        "    \"i64\": -1234567890123456789\n"
         "}",
         buffer.GetString());
 }
@@ -69,7 +71,9 @@ TEST(PrettyWriter, SetIndent) {
         "\t\t1,\n"
         "\t\t2,\n"
         "\t\t3\n"
-        "\t]\n"
+        "\t],\n"
+        "\t\"u64\": 1234567890123456789,\n"
+        "\t\"i64\": -1234567890123456789\n"
         "}",
         buffer.GetString());
 }
diff --git a/test/unittest/writertest.cpp b/test/unittest/writertest.cpp
index 642161a..54ade34 100644
--- a/test/unittest/writertest.cpp
+++ b/test/unittest/writertest.cpp
@@ -152,7 +152,7 @@ private:
 };
 
 TEST(Writer, OStreamWrapper) {
-    StringStream s("{ \"hello\" : \"world\", \"t\" : true , \"f\" : false, \"n\": null, \"i\":123, \"pi\": 3.1416, \"a\":[1, 2, 3] } ");
+    StringStream s("{ \"hello\" : \"world\", \"t\" : true , \"f\" : false, \"n\": null, \"i\":123, \"pi\": 3.1416, \"a\":[1, 2, 3], \"u64\": 1234567890123456789, \"i64\":-1234567890123456789 } ");
     
     std::stringstream ss;
     OStreamWrapper os(ss);
@@ -163,7 +163,7 @@ TEST(Writer, OStreamWrapper) {
     reader.Parse<0>(s, writer);
     
     std::string actual = ss.str();
-    EXPECT_STREQ("{\"hello\":\"world\",\"t\":true,\"f\":false,\"n\":null,\"i\":123,\"pi\":3.1416,\"a\":[1,2,3]}", actual.c_str());
+    EXPECT_STREQ("{\"hello\":\"world\",\"t\":true,\"f\":false,\"n\":null,\"i\":123,\"pi\":3.1416,\"a\":[1,2,3],\"u64\":1234567890123456789,\"i64\":-1234567890123456789}", actual.c_str());
 }
 
 TEST(Writer, AssertRootMayBeAnyValue) {