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diff --git a/docshell/test/navigation/file_bug1379762-1.html b/docshell/test/navigation/file_bug1379762-1.html
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+++ b/docshell/test/navigation/file_bug1379762-1.html
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+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>Bug 1379762</title>
+  </head>
+  <img srcset> <!-- This tries to add load blockers during bfcache restoration -->
+  <script>
+    onunload = null; // enable bfcache
+    opener.is(opener.testCount, 0,
+              "We should only run once; otherwise the loadCount variable makes no sense");
+    var loadCount = 0;
+    onpageshow = function() {
+      ++opener.testCount;
+      if (opener.testCount == 1) {
+        // Navigate forward and then back.
+        setTimeout(function() { location = "goback.html"; }, 0);
+      } else if (opener.testCount == 2) {
+        // Do this async so our load event gets a chance to fire if it plans to
+        // do it.
+        setTimeout(function() {
+          opener.nextTest();
+          window.close();
+        });
+      }
+    };
+    onload = function() {
+      ++loadCount;
+      opener.is(loadCount, 1, "Should only get one onload");
+    }
+  </script>
+</html>