diff --git a/JsonGeneratorTests/StringBuilderTests.cpp b/JsonGeneratorTests/StringBuilderTests.cpp
index 4e418e3d..6c4de1d3 100644
--- a/JsonGeneratorTests/StringBuilderTests.cpp
+++ b/JsonGeneratorTests/StringBuilderTests.cpp
@@ -29,6 +29,12 @@ namespace JsonGeneratorTests
             assertResultIs("");
         }
 
+        TEST_METHOD(AppendString)
+        {
+            append("ABCD");
+            assertResultIs("ABCD");
+        }
+
         void append(const char* s)
         {
             sb->append(s);