diff --git a/test/filesystem_test.cpp b/test/filesystem_test.cpp
index 9ec64d0..bc38068 100644
--- a/test/filesystem_test.cpp
+++ b/test/filesystem_test.cpp
@@ -193,7 +193,7 @@ class TemporaryDirectory
 
 static void generateFile(const fs::path& pathname, int withSize = -1)
 {
-    fs::ofstream outfile(pathname.string());
+    fs::ofstream outfile(pathname);
     if (withSize < 0) {
         outfile << "Hello world!" << std::endl;
     }