diff --git a/tests/path_utils.cpp b/tests/path_utils.cpp
index c23984d..3a3fb72 100644
--- a/tests/path_utils.cpp
+++ b/tests/path_utils.cpp
@@ -5,7 +5,7 @@
  *
 */
 
-#include "trompeloeil_doctest.h"
+#include "trompeloeil_doctest.hpp"
 #include "ast_path.hpp"
 
 TEST_CASE("path utils")