diff --git a/tests/utils.h b/tests/utils.h
index c62da75..4c3aef4 100644
--- a/tests/utils.h
+++ b/tests/utils.h
@@ -128,6 +128,8 @@
 
 // Get realpath
 bool get_realpath(const std::string& path, std::string* realpath);
+// Get dirname
+std::string get_dirname(const char* path);
 
 // Access to argc/argv/envp
 int get_argc();