diff --git a/core/keyboard_nav/ast_node.js b/core/keyboard_nav/ast_node.js
index 9f1ed6e9d..f4328a0ae 100644
--- a/core/keyboard_nav/ast_node.js
+++ b/core/keyboard_nav/ast_node.js
@@ -242,33 +242,6 @@ Blockly.ASTNode.prototype.isConnection = function() {
   return this.isConnection_;
 };
 
-/**
- * Get either the previous editable field, or get the first editable field for
- * the given input.
- * @param {!(Blockly.Field|Blockly.Connection)} location The current location of
- *     the cursor, which must be a field or connection.
- * @param {!Blockly.Input} parentInput The parentInput of the field.
- * @param {boolean=} opt_last If true find the last editable field otherwise get
- *     the previous field.
- * @return {Blockly.ASTNode} The AST node holding the previous or last field or
- *     null if no previous field exists.
- * @private
- */
-Blockly.ASTNode.prototype.findPreviousEditableField_ = function(location,
-    parentInput, opt_last) {
-  var fieldRow = parentInput.fieldRow;
-  var fieldIdx = fieldRow.indexOf(location);
-  var previousField = null;
-  var startIdx = (opt_last ? fieldRow.length : fieldIdx) - 1;
-  for (var i = startIdx, field; field = fieldRow[i]; i--) {
-    if (field.EDITABLE) {
-      previousField = field;
-      return Blockly.ASTNode.createFieldNode(previousField);
-    }
-  }
-  return null;
-};
-
 /**
  * Given an input find the next editable field or an input with a non null
  * connection in the same block. The current location must be an input
diff --git a/tests/mocha/astnode_test.js b/tests/mocha/astnode_test.js
index ae3f65a43..b172de82f 100644
--- a/tests/mocha/astnode_test.js
+++ b/tests/mocha/astnode_test.js
@@ -110,23 +110,6 @@ suite('ASTNode', function() {
   });
 
   suite('HelperFunctions', function() {
-    test('findPreviousEditableField_', function() {
-      var input = this.blocks.statementInput1.inputList[0];
-      var field = input.fieldRow[1];
-      var prevField = input.fieldRow[0];
-      var node = Blockly.ASTNode.createFieldNode(prevField);
-      var editableField = node.findPreviousEditableField_(field, input);
-      assertEquals(editableField.getLocation(), prevField);
-    });
-
-    test('findPreviousEditableFieldLast_', function() {
-      var input = this.blocks.statementInput1.inputList[0];
-      var field = input.fieldRow[0];
-      var node = Blockly.ASTNode.createFieldNode(field);
-      var editableField = node.findPreviousEditableField_(field, input, true);
-      assertEquals(editableField.getLocation(), input.fieldRow[1]);
-    });
-
     test('findNextForInput_', function() {
       var input = this.blocks.statementInput1.inputList[0];
       var input2 = this.blocks.statementInput1.inputList[1];