diff --git a/layout/tools/reftest/output.py b/layout/tools/reftest/output.py
index 31b061cce80a..eac9eda95d90 100644
--- a/layout/tools/reftest/output.py
+++ b/layout/tools/reftest/output.py
@@ -52,14 +52,14 @@ class ReftestFormatter(TbplFormatter):
         if "reftest_screenshots" in extra:
             screenshots = extra["reftest_screenshots"]
             image_1 = screenshots[0]["screenshot"]
-            image_2 = screenshots[2]["screenshot"]
 
             if len(screenshots) == 3:
+                image_2 = screenshots[2]["screenshot"]
                 output_text += ("\nREFTEST   IMAGE 1 (TEST): data:image/png;base64,%s\n"
                                 "REFTEST   IMAGE 2 (REFERENCE): data:image/png;base64,%s") % (
                                 image_1, image_2)
             elif len(screenshots) == 1:
-                output_text += "\nREFTEST   IMAGE: data:image/png;base64,%(image1)s" % image_1
+                output_text += "\nREFTEST   IMAGE: data:image/png;base64,%s" % image_1
 
         output_text += "\nREFTEST TEST-END | %s" % test
         return "%s\n" % output_text
diff --git a/layout/tools/reftest/reftest.jsm b/layout/tools/reftest/reftest.jsm
index 79e5f3878e40..0147fae7d223 100644
--- a/layout/tools/reftest/reftest.jsm
+++ b/layout/tools/reftest/reftest.jsm
@@ -1762,7 +1762,12 @@ function RecordResult(testRunTime, errorMsg, scriptResults)
                         message += (", max difference: " + extra.max_difference +
                                     ", number of differing pixels: " + differences);
                     } else {
-                        extra.image1 = gCanvas1.toDataURL();
+                        var image1 = gCanvas1.toDataURL();
+                        extra.reftest_screenshots = [
+                            {url:gURLs[0].identifier[0],
+                             screenshot: image1.slice(image1.indexOf(",") + 1)}
+                        ];
+                        extra.image1 = image1;
                     }
                 }
                 logger.testEnd(gURLs[0].identifier, output.s[0], output.s[1], message, null, extra);