diff --git a/src/Apps/Tools/ColorTester.cpp b/src/Apps/Tools/ColorTester.cpp
index 8250299..d0af0f9 100644
--- a/src/Apps/Tools/ColorTester.cpp
+++ b/src/Apps/Tools/ColorTester.cpp
@@ -210,15 +210,26 @@ int main(int argc, char** argv)
     };
     Vector<ImageUpload> imageUploads;
     Vector<bool> imageIsHDR;
-    if (std::filesystem::exists("images"))
+    if (!std::filesystem::exists("images")) {
+        log::err("No image directory!");
+        return 1;
+    }
+
     {
+        Vector<std::string> filenames;
+
         for (const auto &entry : std::filesystem::directory_iterator("images"))
+            filenames.push_back(std::string(entry.path()));
+
+        std::sort(filenames.begin(), filenames.end(), [](const auto& a, const auto& b) { return a < b; });
+
+        for (auto& entry : filenames)
         {
-            std::cout << entry.path() << std::endl;
+            std::cout << entry << std::endl;
 
             bool imageHDR = true;//std::string(entry.path()).find(".pq.") != std::string::npos;
 
-            auto r_pngData = fs::OpenFileIntoBuffer(entry.path().c_str());
+            auto r_pngData = fs::OpenFileIntoBuffer(entry.c_str());
             if (!r_pngData)
                 continue;