diff --git a/src/test/test_options.hpp.in b/src/test/test_options.hpp.in
index 8e75ecda6..201961cc4 100644
--- a/src/test/test_options.hpp.in
+++ b/src/test/test_options.hpp.in
@@ -1,6 +1,6 @@
 #ifndef TEST_OPTIONS_HPP
 
 /// Directory path, passed in from the outside, for the path to the test inputs dir.
-constexpr auto* testfile_dir {U"@TESTFILE_DIR@"};
+constexpr auto* testfile_dir {"@TESTFILE_DIR@"};
 
 #endif // TEST_OPTIONS_HPP