diff --git a/lib/analyze_test_results.py b/lib/analyze_test_results.py
index 0ae7d8f..25db05e 100644
--- a/lib/analyze_test_results.py
+++ b/lib/analyze_test_results.py
@@ -282,9 +282,11 @@ summary = '\n'.join(make_summary())
 print(render_for_terminal(summary))
 
 if os.path.exists("/usr/bin/wkhtmltoimage"):
-    export_as_image(summary, test_context + "/summary.jpg")
+    export_as_image(summary, test_context + "/summary.png")
+    if os.path.exists("/usr/bin/optipnge"):
+        os.system(f"/usr/bin/optipng {test_context}/summary.png")
 else:
-    print("(Protip™ for CI admin: you should 'apt install wkhtmltopdf --no-install-recommends' to enable result summary export to .jpg)")
+    print("(Protip™ for CI admin: you should 'apt install wkhtmltopdf optipng --no-install-recommends' to enable result summary export to .png)")
 
 summary = {
     "app": open(test_context + "/app_id").read().strip(),