diff --git a/closure/goog/positioning/positioning_test.js b/closure/goog/positioning/positioning_test.js
index <HASH>..<HASH> 100644
--- a/closure/goog/positioning/positioning_test.js
+++ b/closure/goog/positioning/positioning_test.js
@@ -696,7 +696,15 @@ function testPositionAtAnchorWithResizeHeight() {
       viewport.toBox());
   assertEquals('Status should be HEIGHT_ADJUSTED.',
                goog.positioning.OverflowStatus.HEIGHT_ADJUSTED, status);
-  assertTrue('Popup is within viewport',
+
+  var TOLERANCE = 0.1;
+  // Adjust the viewport to allow some tolerance for subpixel positioning,
+  // this is required for this test to pass on IE10,11
+  viewport.top -= TOLERANCE;
+  viewport.left -= TOLERANCE;
+
+  assertTrue('Popup ' + goog.style.getBounds(popup) +
+             ' not is within viewport' + viewport,
              viewport.contains(goog.style.getBounds(popup)));
 }
Add some tolerance for subpixel positioning on IE<I>/<I>.
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Created by MOE: <URL>