diff --git a/tests/parser_methods.cpp b/tests/parser_methods.cpp
index 2a84428..bd53a24 100644
--- a/tests/parser_methods.cpp
+++ b/tests/parser_methods.cpp
@@ -7,7 +7,7 @@
 */
 
 #include <experimental/iterator>
-#include "trompeloeil_doctest.h"
+#include "trompeloeil_doctest.hpp"
 #include "ast_commands.hpp"
 #include "parser.hpp"
 #include "static_schema.hpp"