diff --git a/tests/test-chat-template.cpp b/tests/test-chat-template.cpp
index bf2fe3b2c..628f960b1 100644
--- a/tests/test-chat-template.cpp
+++ b/tests/test-chat-template.cpp
@@ -13,6 +13,7 @@
 #include <iostream>
 #include <string>
 #include <json.hpp>
+#include <dirent.h>
 
 using json = nlohmann::ordered_json;
 
@@ -39,9 +40,22 @@ static void assert_equals(const T & expected, const T & actual) {
 
 static std::vector<std::string> find_files(const std::string & folder, const std::string & ext) {
     std::vector<std::string> files;
-    for (const auto & entry : std::__fs::filesystem::directory_iterator(folder)) {
-        if (entry.path().extension() == ext)
-            files.push_back(entry.path().string());
+    // Note: once we can use C++17 this becomes:
+    //   for (const auto & entry : std::filesystem::directory_iterator(folder))
+    //     if (entry.path().extension() == ext) files.push_back(entry.path().string());
+    DIR* dir = opendir(folder.c_str());
+    if (dir != nullptr) {
+        struct dirent* entry;
+        while ((entry = readdir(dir)) != nullptr) {
+            if (entry->d_type == DT_REG) {  // If it's a regular file
+                std::string filename = entry->d_name;
+                if (filename.length() >= ext.length() &&
+                    filename.compare(filename.length() - ext.length(), ext.length(), ext) == 0) {
+                    files.push_back(folder + "/" + filename);
+                }
+            }
+        }
+        closedir(dir);
     }
     return files;
 }