diff --git a/test/utf8.t.cpp b/test/utf8.t.cpp
index 1dae6f251..487933548 100644
--- a/test/utf8.t.cpp
+++ b/test/utf8.t.cpp
@@ -46,12 +46,12 @@ int main (int argc, char** argv)
   // TODO int utf8_sequence (unsigned int);
 
   // unsigned int utf8_length (const std::string&);
-  t.is (utf8_length (ascii_text), 14, "ASCII utf8_length");
-  t.is (utf8_length (utf8_text),  20, "UTF8 utf8_length");
+  t.is ((int) utf8_length (ascii_text), 14, "ASCII utf8_length");
+  t.is ((int) utf8_length (utf8_text),  20, "UTF8 utf8_length");
 
   // unsigned int utf8_text_length (const std::string&);
-  t.is (utf8_text_length (ascii_text_color), 14, "ASCII utf8_text_length");
-  t.is (utf8_text_length (utf8_text_color),  20, "UTF8 utf8_text_length");
+  t.is ((int) utf8_text_length (ascii_text_color), 14, "ASCII utf8_text_length");
+  t.is ((int) utf8_text_length (utf8_text_color),  20, "UTF8 utf8_text_length");
 
   // const std::string utf8_substr (const std::string&, unsigned int, unsigned int length = 0);
   t.is (utf8_substr (ascii_text, 0, 2), "Th", "ASCII utf8_substr");