diff --git a/src/backend/model/diagnostics/ConfigDiagnostics.ts b/src/backend/model/diagnostics/ConfigDiagnostics.ts
index bfdc1e2f..b389249b 100644
--- a/src/backend/model/diagnostics/ConfigDiagnostics.ts
+++ b/src/backend/model/diagnostics/ConfigDiagnostics.ts
@@ -313,8 +313,10 @@ export class ConfigDiagnostics {
       // Check if a test available for this image format.
       // if not probably because it is trivial
       if (!fs.existsSync(testImage)) {
+        Logger.silly(LOG_TAG, `No test for ${ext} image format. skipping.`);
         continue;
       }
+      Logger.silly(LOG_TAG, `Testing ${ext} image formats.`);
       try {
         await PhotoWorker.renderFromImage({
             type: ThumbnailSourceType.Photo,