diff --git a/test/enc_dec_test.cc b/test/enc_dec_test.cc
index afc121a..cfa46f3 100644
--- a/test/enc_dec_test.cc
+++ b/test/enc_dec_test.cc
@@ -51,7 +51,7 @@ struct fmt::formatter<MovableType> : formatter<int>
 template<typename S, typename... Args>
 void test(const S& format, Args&&... args) {
   fmt::detail::check_format_string<Args...>(format);
-  auto sv = fmt::detail::to_string_view(format);
+  auto sv = fmt::string_view(format);
   size_t formatted_size = fmt::formatted_size(fmt::runtime(sv), std::forward<Args>(args)...);
   string ans = fmt::format(fmt::runtime(sv), std::forward<Args>(args)...);
   assert(ans.size() == formatted_size);