diff --git a/core/variables.js b/core/variables.js
index f5d7216c0..ab85adb6e 100644
--- a/core/variables.js
+++ b/core/variables.js
@@ -283,15 +283,13 @@ Blockly.Variables.createVariableButtonHandler = function(
             var existing =
                 Blockly.Variables.nameUsedWithAnyType_(text, workspace);
             if (existing) {
-              var lowerCase = text.toLowerCase();
               if (existing.type == type) {
                 var msg = Blockly.Msg['VARIABLE_ALREADY_EXISTS'].replace(
-                    '%1', lowerCase).replace('%2', existing.name);
+                    '%1', existing.name);
               } else {
                 var msg =
                     Blockly.Msg['VARIABLE_ALREADY_EXISTS_FOR_ANOTHER_TYPE'];
-                msg = msg.replace('%1', lowerCase).replace('%2', existing.type)
-                    .replace('%3', existing.name);
+                msg = msg.replace('%1', existing.name).replace('%2', existing.type);
               }
               Blockly.alert(msg,
                   function() {
@@ -352,9 +350,8 @@ Blockly.Variables.renameVariable = function(workspace, variable,
                 variable.type, workspace);
             if (existing) {
               var msg = Blockly.Msg['VARIABLE_ALREADY_EXISTS_FOR_ANOTHER_TYPE']
-                  .replace('%1', newName.toLowerCase())
-                  .replace('%2', existing.type)
-                  .replace('%3', existing.name);
+                  .replace('%1', existing.name)
+                  .replace('%2', existing.type);
               Blockly.alert(msg,
                   function() {
                     promptAndCheckWithAlert(newName);  // Recurse
diff --git a/msg/messages.js b/msg/messages.js
index a56e5ae3c..2cb5c3ed8 100644
--- a/msg/messages.js
+++ b/msg/messages.js
@@ -172,10 +172,10 @@ Blockly.Msg.NEW_VARIABLE_TYPE_TITLE = 'New variable type:';
 Blockly.Msg.NEW_VARIABLE_TITLE = 'New variable name:';
 /** @type {string} */
 /// alert - Tells the user that the name they entered is already in use.
-Blockly.Msg.VARIABLE_ALREADY_EXISTS = 'A variable named "%1" already exists (as "%2").';
+Blockly.Msg.VARIABLE_ALREADY_EXISTS = 'A variable named "%1" already exists.';
 /** @type {string} */
 /// alert - Tells the user that the name they entered is already in use for another type.
-Blockly.Msg.VARIABLE_ALREADY_EXISTS_FOR_ANOTHER_TYPE = 'A variable named "%1" already exists for another type: "%2" (as "%3").';
+Blockly.Msg.VARIABLE_ALREADY_EXISTS_FOR_ANOTHER_TYPE = 'A variable named "%1" already exists for another type: "%2".';
 
 // Variable deletion.
 /** @type {string} */