diff --git a/README.md b/README.md
index 8708f725..e64f1156 100644
--- a/README.md
+++ b/README.md
@@ -167,13 +167,16 @@ template <class T> using ASharedPtr = std::shared_ptr<A<double, T>>;
 template <class T, class U>
 using AAPtr = std::unique_ptr<std::pair<A<double, T>, A<long, U>>>;
 
-template <typename... T> using GeneralCallback = std::function<void(T..., int)>;
-using VoidCallback = GeneralCallback<>;
+template <typename T> using SimpleCallback = std::function<void(T, int)>;
+template <typename... T> using GenericCallback = std::function<void(T..., int)>;
+using VoidCallback = GenericCallback<void *>;
 
 using BVector = std::vector<B>;
 using BVector2 = BVector;
 
 using AIntString = AString<int>;
+using ACharString = AString<char>;
+using AWCharString = AString<wchar_t>;
 using AStringString = AString<std::string>;
 using BStringString = AStringString;
 
@@ -194,7 +197,8 @@ protected:
 
 public:
     BVector2 bs2;
-    GeneralCallback<AIntString> cb;
+    SimpleCallback<ACharString> cb;
+    GenericCallback<AWCharString> gcb;
     VoidCallback vcb;
     VectorPtr<B> vps;
 };
diff --git a/tests/t00014/t00014.cc b/tests/t00014/t00014.cc
index e9b11839..880f7d0b 100644
--- a/tests/t00014/t00014.cc
+++ b/tests/t00014/t00014.cc
@@ -39,14 +39,16 @@ template <class T> using ASharedPtr = std::shared_ptr<A<double, T>>;
 template <class T, class U>
 using AAPtr = std::unique_ptr<std::pair<A<double, T>, A<long, U>>>;
 
-template <typename T> using GeneralCallback = std::function<void(T, int)>;
-using VoidCallback = GeneralCallback<void *>;
+template <typename T> using SimpleCallback = std::function<void(T, int)>;
+template <typename... T> using GenericCallback = std::function<void(T..., int)>;
+using VoidCallback = GenericCallback<void *>;
 
 using BVector = std::vector<B>;
 using BVector2 = BVector;
 
 using AIntString = AString<int>;
 using ACharString = AString<char>;
+using AWCharString = AString<wchar_t>;
 using AStringString = AString<std::string>;
 using BStringString = AStringString;
 
@@ -67,7 +69,8 @@ protected:
 
 public:
     BVector2 bs2;
-    GeneralCallback<ACharString> cb;
+    SimpleCallback<ACharString> cb;
+    GenericCallback<AWCharString> gcb;
     VoidCallback vcb;
     VectorPtr<B> vps;
 };
diff --git a/tests/t00014/test_case.h b/tests/t00014/test_case.h
index a7427ad3..7b5c0299 100644
--- a/tests/t00014/test_case.h
+++ b/tests/t00014/test_case.h
@@ -60,7 +60,8 @@ TEST_CASE("t00014", "[test-case][class]")
 
     REQUIRE_THAT(puml, IsField<Protected>("bs", "BVector"));
 
-    REQUIRE_THAT(puml, IsField<Public>("cb", "GeneralCallback<ACharString>"));
+    REQUIRE_THAT(puml, IsField<Public>("cb", "SimpleCallback<ACharString>"));
+    REQUIRE_THAT(puml, IsField<Public>("gcb", "GenericCallback<AWCharString>"));
     REQUIRE_THAT(puml, IsField<Public>("vcb", "VoidCallback"));
 
     REQUIRE_THAT(
@@ -82,6 +83,8 @@ TEST_CASE("t00014", "[test-case][class]")
         IsInstantiation(_A("A<T,std::string>"), _A("A<bool,std::string>")));
     REQUIRE_THAT(puml,
         IsInstantiation(_A("A<T,std::string>"), _A("A<char,std::string>")));
+    REQUIRE_THAT(puml,
+        IsInstantiation(_A("A<T,std::string>"), _A("A<wchar_t,std::string>")));
 
     REQUIRE_THAT(puml,
         IsInstantiation(_A("A<T,std::unique_ptr<std::string>>"),
@@ -104,6 +107,7 @@ TEST_CASE("t00014", "[test-case][class]")
         IsAggregation(_A("R"), _A("A<float,std::unique_ptr<std::string>>"),
             "-floatstring"));
     REQUIRE_THAT(puml, IsDependency(_A("R"), _A("A<char,std::string>")));
+    REQUIRE_THAT(puml, IsDependency(_A("R"), _A("A<wchar_t,std::string>")));
 
     save_puml(
         "./" + config.output_directory() + "/" + diagram->name + ".puml", puml);