diff --git a/test/util-test.cc b/test/util-test.cc
index c9db1ae1..5073dcf7 100644
--- a/test/util-test.cc
+++ b/test/util-test.cc
@@ -667,7 +667,7 @@ TEST(UtilTest, UTF16ToUTF8) {
 
 TEST(UtilTest, UTF16ToUTF8EmptyString) {
 	std::string s = "";
-	fmt::internal::UTF16ToUTF8 u(L"");
+	fmt::internal::utf16_to_utf8 u(L"");
 	EXPECT_EQ(s, u.str());
 	EXPECT_EQ(s.size(), u.size());
 }
@@ -681,7 +681,7 @@ TEST(UtilTest, UTF8ToUTF16) {
 
 TEST(UtilTest, UTF8ToUTF16EmptyString) {
 	std::string s = "";
-	fmt::internal::UTF8ToUTF16 u(s.c_str());
+	fmt::internal::utf8_to_utf16 u(s.c_str());
 	EXPECT_EQ(L"", u.str());
 	EXPECT_EQ(s.size(), u.size());
 }