diff --git a/IPython/html/tests/notebook/display_image.js b/IPython/html/tests/notebook/display_image.js
index e04a252..1e980e6 100644
--- a/IPython/html/tests/notebook/display_image.js
+++ b/IPython/html/tests/notebook/display_image.js
@@ -16,7 +16,7 @@ b64_image_data = {
 casper.notebook_test(function () {
     this.test_img_shape = function(fmt, retina) {
         this.thenEvaluate(function (b64data, retina) {
-            IPython.notebook.insert_cell_at_index(0, "code");
+            IPython.notebook.insert_cell_at_index("code", 0);
             var cell = IPython.notebook.get_cell(0);
             cell.set_text([
                 "import base64",
diff --git a/IPython/html/tests/notebook/output.js b/IPython/html/tests/notebook/output.js
index b519b64..b442a04 100644
--- a/IPython/html/tests/notebook/output.js
+++ b/IPython/html/tests/notebook/output.js
@@ -10,7 +10,7 @@ casper.notebook_test(function () {
         });
         
         this.thenEvaluate(function (code) {
-            IPython.notebook.insert_cell_at_index(0, "code");
+            IPython.notebook.insert_cell_at_index("code", 0);
             var cell = IPython.notebook.get_cell(0);
             cell.set_text(code);
             cell.execute();
@@ -38,7 +38,7 @@ casper.notebook_test(function () {
     };
     
     this.thenEvaluate(function () {
-        IPython.notebook.insert_cell_at_index(0, "code");
+        IPython.notebook.insert_cell_at_index("code", 0);
         var cell = IPython.notebook.get_cell(0);
         cell.set_text([
             "from __future__ import print_function",