diff --git a/tests/src/test_transform.cpp b/tests/src/test_transform.cpp
index c97cf5f..66fa855 100644
--- a/tests/src/test_transform.cpp
+++ b/tests/src/test_transform.cpp
@@ -1,3 +1,4 @@
+#include "helpers.hpp"
 #include "utils/transform.hpp"
 
 #include <set>