diff --git a/src/tests/CMakeLists.txt b/src/tests/CMakeLists.txt
--- a/src/tests/CMakeLists.txt
+++ b/src/tests/CMakeLists.txt
@@ -2,5 +2,6 @@ add_test_files(
     landscape_partial_pixel_z.cpp
     math_func.cpp
     string_func.cpp
+    strings_func.cpp
     test_main.cpp
 )