diff --git a/public/test/specs/kbn-format-specs.js b/public/test/specs/kbn-format-specs.js
index c7b9cf8cee1..d8a11c5a43c 100644
--- a/public/test/specs/kbn-format-specs.js
+++ b/public/test/specs/kbn-format-specs.js
@@ -63,7 +63,7 @@ define([
     it('10m 1600 resolution', function() {
       var range = { from: kbn.parseDate('now-10m'), to: kbn.parseDate('now') };
       var str = kbn.calculateInterval(range, 1600, null);
-      expect(str).to.be('0.1s');
+      expect(str).to.be('100ms');
     });
 
     it('fixed user interval', function() {