diff --git a/tests/test_string.cpp b/tests/test_string.cpp
index 4a58c277..f2976919 100644
--- a/tests/test_string.cpp
+++ b/tests/test_string.cpp
@@ -62,6 +62,13 @@ public:
     String latin = "Jos\xe9 Carlos";
     CPPUNIT_ASSERT(strcmp(latin.toCString(true), "José Carlos") == 0);
 
+    String c;
+    c = "1";
+    CPPUNIT_ASSERT(c == L"1");
+
+    c = L'\u4E00';
+    CPPUNIT_ASSERT(c == L"\u4E00");
+
     String unicode2(unicode.to8Bit(true), String::UTF8);
     CPPUNIT_ASSERT(unicode == unicode2);