diff --git a/tests/command_completion.cpp b/tests/command_completion.cpp
index d439394..9ab146e 100644
--- a/tests/command_completion.cpp
+++ b/tests/command_completion.cpp
@@ -6,7 +6,7 @@
  *
 */
 
-#include "trompeloeil_doctest.h"
+#include "trompeloeil_doctest.hpp"
 #include "parser.hpp"
 #include "pretty_printers.hpp"
 #include "static_schema.hpp"