diff --git a/mobile/chrome/tests/browser_dragger.js b/mobile/chrome/tests/browser_dragger.js
index e37a37bebfd..0b873ddc4ee 100644
--- a/mobile/chrome/tests/browser_dragger.js
+++ b/mobile/chrome/tests/browser_dragger.js
@@ -23,7 +23,7 @@ gTests.push({
     let winWidth = window.innerWidth;
     info("Browser document width is " + docWidth);
     info("Window width is " + winWidth);
-    is(docWidth, winWidth,
+    ok(docWidth <= winWidth,
        "Sanity check. Blank document cannot be panned left or right.");
 
     function dragAndCheck(dx) {