diff --git a/src/tests/src/solver/modeler/loadFiles/testLoadModelerFiles.cpp b/src/tests/src/solver/modeler/loadFiles/testLoadModelerFiles.cpp
index 1e476ac379..d6868fdb45 100644
--- a/src/tests/src/solver/modeler/loadFiles/testLoadModelerFiles.cpp
+++ b/src/tests/src/solver/modeler/loadFiles/testLoadModelerFiles.cpp
@@ -70,7 +70,7 @@ BOOST_FIXTURE_TEST_CASE(read_one_lib_file, FixtureLoadFile)
 
 BOOST_FIXTURE_TEST_CASE(dont_read_bad_extension, FixtureLoadFile)
 {
-    createFile(libraryDirPath, "abc.txt");
+    createFile(libraryDirPath.string(), "abc.txt");
     auto libraries = Antares::Solver::LoadFiles::loadLibraries(studyPath);
     BOOST_CHECK(libraries.empty());
 }