diff --git a/tests/CL.h b/tests/CL.h
new file mode 100644
index 00000000..29abcf5f
--- /dev/null
+++ b/tests/CL.h
@@ -0,0 +1,7 @@
+#pragma once
+
+#include "Tests.h"
+
+class DLL_API CL {
+
+};
\ No newline at end of file
diff --git a/tests/CSharp/CSharp.cpp b/tests/CSharp/CSharp.cpp
index 64716b44..6e3ad024 100644
--- a/tests/CSharp/CSharp.cpp
+++ b/tests/CSharp/CSharp.cpp
@@ -1,5 +1,7 @@
 #include "CSharp.h"
 
+void myfn(CL cl);
+
 Foo::Foo(const QString& name)
 {
 }
diff --git a/tests/CSharp/CSharp.h b/tests/CSharp/CSharp.h
index faffaf76..f927f886 100644
--- a/tests/CSharp/CSharp.h
+++ b/tests/CSharp/CSharp.h
@@ -10,6 +10,7 @@
 #include "AnotherUnit.h"
 #include "ExcludedUnit.hpp"
 #include "CSharpTemplates.h"
+#include "../CL.h"
 
 struct SmallPOD
 {
@@ -17,6 +18,8 @@ struct SmallPOD
     int b;
 };
 
+DLL_API void myfn(CL cl);
+
 class DLL_API Foo
 {
 public: