diff --git a/core/renderers/geras/path_object.js b/core/renderers/geras/path_object.js
index 474cad3c0..9d50c672c 100644
--- a/core/renderers/geras/path_object.js
+++ b/core/renderers/geras/path_object.js
@@ -11,32 +11,35 @@
 
 'use strict';
 
-goog.provide('Blockly.geras.PathObject');
+goog.module('Blockly.geras.PathObject');
+goog.module.declareLegacyNamespace();
 
-goog.require('Blockly.blockRendering.PathObject');
-goog.require('Blockly.geras.ConstantProvider');
-goog.require('Blockly.Theme');
-goog.require('Blockly.utils.colour');
-goog.require('Blockly.utils.dom');
-goog.require('Blockly.utils.object');
-goog.require('Blockly.utils.Svg');
+const BasePathObject = goog.require('Blockly.blockRendering.PathObject');
+/* eslint-disable-next-line no-unused-vars */
+const ConstantProvider = goog.requireType('Blockly.geras.ConstantProvider');
+const Svg = goog.require('Blockly.utils.Svg');
+/* eslint-disable-next-line no-unused-vars */
+const Theme = goog.requireType('Blockly.Theme');
+const colour = goog.require('Blockly.utils.colour');
+const dom = goog.require('Blockly.utils.dom');
+const object = goog.require('Blockly.utils.object');
 
 
 /**
  * An object that handles creating and setting each of the SVG elements
  * used by the renderer.
  * @param {!SVGElement} root The root SVG element.
- * @param {!Blockly.Theme.BlockStyle} style The style object to use for
+ * @param {!Theme.BlockStyle} style The style object to use for
  *     colouring.
- * @param {!Blockly.geras.ConstantProvider} constants The renderer's constants.
+ * @param {!ConstantProvider} constants The renderer's constants.
  * @constructor
- * @extends {Blockly.blockRendering.PathObject}
+ * @extends {BasePathObject}
  * @package
  */
-Blockly.geras.PathObject = function(root, style, constants) {
+const PathObject = function(root, style, constants) {
   /**
    * The renderer's constant provider.
-   * @type {!Blockly.geras.ConstantProvider}
+   * @type {!ConstantProvider}
    */
   this.constants = constants;
 
@@ -50,9 +53,8 @@ Blockly.geras.PathObject = function(root, style, constants) {
    * @type {SVGElement}
    * @package
    */
-  this.svgPathDark = Blockly.utils.dom.createSvgElement(
-      Blockly.utils.Svg.PATH,
-      {'class': 'blocklyPathDark', 'transform': 'translate(1,1)'},
+  this.svgPathDark = dom.createSvgElement(
+      Svg.PATH, {'class': 'blocklyPathDark', 'transform': 'translate(1,1)'},
       this.svgRoot);
 
   /**
@@ -60,18 +62,16 @@ Blockly.geras.PathObject = function(root, style, constants) {
    * @type {!SVGElement}
    * @package
    */
-  this.svgPath = Blockly.utils.dom.createSvgElement(
-      Blockly.utils.Svg.PATH,
-      {'class': 'blocklyPath'}, this.svgRoot);
+  this.svgPath =
+      dom.createSvgElement(Svg.PATH, {'class': 'blocklyPath'}, this.svgRoot);
 
   /**
    * The light path of the block.
    * @type {SVGElement}
    * @package
    */
-  this.svgPathLight = Blockly.utils.dom.createSvgElement(
-      Blockly.utils.Svg.PATH,
-      {'class': 'blocklyPathLight'}, this.svgRoot);
+  this.svgPathLight = dom.createSvgElement(
+      Svg.PATH, {'class': 'blocklyPathLight'}, this.svgRoot);
 
   /**
    * The colour of the dark path on the block in '#RRGGBB' format.
@@ -82,18 +82,17 @@ Blockly.geras.PathObject = function(root, style, constants) {
 
   /**
    * The style object to use when colouring block paths.
-   * @type {!Blockly.Theme.BlockStyle}
+   * @type {!Theme.BlockStyle}
    * @package
    */
   this.style = style;
 };
-Blockly.utils.object.inherits(Blockly.geras.PathObject,
-    Blockly.blockRendering.PathObject);
+object.inherits(PathObject, BasePathObject);
 
 /**
  * @override
  */
-Blockly.geras.PathObject.prototype.setPath = function(mainPath) {
+PathObject.prototype.setPath = function(mainPath) {
   this.svgPath.setAttribute('d', mainPath);
   this.svgPathDark.setAttribute('d', mainPath);
 };
@@ -103,14 +102,14 @@ Blockly.geras.PathObject.prototype.setPath = function(mainPath) {
  * @param {string} highlightPath The highlight path.
  * @package
  */
-Blockly.geras.PathObject.prototype.setHighlightPath = function(highlightPath) {
+PathObject.prototype.setHighlightPath = function(highlightPath) {
   this.svgPathLight.setAttribute('d', highlightPath);
 };
 
 /**
  * @override
  */
-Blockly.geras.PathObject.prototype.flipRTL = function() {
+PathObject.prototype.flipRTL = function() {
   // Mirror the block's path.
   this.svgPath.setAttribute('transform', 'scale(-1 1)');
   this.svgPathLight.setAttribute('transform', 'scale(-1 1)');
@@ -120,13 +119,13 @@ Blockly.geras.PathObject.prototype.flipRTL = function() {
 /**
  * @override
  */
-Blockly.geras.PathObject.prototype.applyColour = function(block) {
+PathObject.prototype.applyColour = function(block) {
   this.svgPathLight.style.display = '';
   this.svgPathDark.style.display = '';
   this.svgPathLight.setAttribute('stroke', this.style.colourTertiary);
   this.svgPathDark.setAttribute('fill', this.colourDark);
 
-  Blockly.geras.PathObject.superClass_.applyColour.call(this, block);
+  PathObject.superClass_.applyColour.call(this, block);
 
   this.svgPath.setAttribute('stroke', 'none');
 };
@@ -134,20 +133,19 @@ Blockly.geras.PathObject.prototype.applyColour = function(block) {
 /**
  * @override
  */
-Blockly.geras.PathObject.prototype.setStyle = function(blockStyle) {
+PathObject.prototype.setStyle = function(blockStyle) {
   this.style = blockStyle;
   this.colourDark =
-      Blockly.utils.colour.blend('#000', this.style.colourPrimary, 0.2) ||
-      this.colourDark;
+      colour.blend('#000', this.style.colourPrimary, 0.2) || this.colourDark;
 };
 
 /**
  * @override
  */
-Blockly.geras.PathObject.prototype.updateHighlighted = function(highlighted) {
+PathObject.prototype.updateHighlighted = function(highlighted) {
   if (highlighted) {
-    this.svgPath.setAttribute('filter',
-        'url(#' + this.constants.embossFilterId + ')');
+    this.svgPath.setAttribute(
+        'filter', 'url(#' + this.constants.embossFilterId + ')');
     this.svgPathLight.style.display = 'none';
   } else {
     this.svgPath.setAttribute('filter', 'none');
@@ -158,7 +156,7 @@ Blockly.geras.PathObject.prototype.updateHighlighted = function(highlighted) {
 /**
  * @override
  */
-Blockly.geras.PathObject.prototype.updateShadow_ = function(shadow) {
+PathObject.prototype.updateShadow_ = function(shadow) {
   if (shadow) {
     this.svgPathLight.style.display = 'none';
     this.svgPathDark.setAttribute('fill', this.style.colourSecondary);
@@ -170,9 +168,11 @@ Blockly.geras.PathObject.prototype.updateShadow_ = function(shadow) {
 /**
  * @override
  */
-Blockly.geras.PathObject.prototype.updateDisabled_ = function(disabled) {
-  Blockly.geras.PathObject.superClass_.updateDisabled_.call(this, disabled);
+PathObject.prototype.updateDisabled_ = function(disabled) {
+  PathObject.superClass_.updateDisabled_.call(this, disabled);
   if (disabled) {
     this.svgPath.setAttribute('stroke', 'none');
   }
 };
+
+exports = PathObject;
diff --git a/tests/deps.js b/tests/deps.js
index 2dceb7137..d979a3cbe 100644
--- a/tests/deps.js
+++ b/tests/deps.js
@@ -137,7 +137,7 @@ goog.addDependency('../../core/renderers/geras/highlight_constants.js', ['Blockl
 goog.addDependency('../../core/renderers/geras/highlighter.js', ['Blockly.geras.Highlighter'], ['Blockly.blockRendering.Types', 'Blockly.utils.svgPaths'], {'lang': 'es6', 'module': 'goog'});
 goog.addDependency('../../core/renderers/geras/info.js', ['Blockly.geras.RenderInfo'], ['Blockly.blockRendering.ExternalValueInput', 'Blockly.blockRendering.InRowSpacer', 'Blockly.blockRendering.RenderInfo', 'Blockly.blockRendering.Types', 'Blockly.geras.InlineInput', 'Blockly.geras.StatementInput', 'Blockly.inputTypes', 'Blockly.utils.object'], {'lang': 'es6', 'module': 'goog'});
 goog.addDependency('../../core/renderers/geras/measurables/inputs.js', ['Blockly.geras.InlineInput', 'Blockly.geras.StatementInput'], ['Blockly.blockRendering.InlineInput', 'Blockly.blockRendering.StatementInput', 'Blockly.utils.object']);
-goog.addDependency('../../core/renderers/geras/path_object.js', ['Blockly.geras.PathObject'], ['Blockly.Theme', 'Blockly.blockRendering.PathObject', 'Blockly.geras.ConstantProvider', 'Blockly.utils.Svg', 'Blockly.utils.colour', 'Blockly.utils.dom', 'Blockly.utils.object']);
+goog.addDependency('../../core/renderers/geras/path_object.js', ['Blockly.geras.PathObject'], ['Blockly.blockRendering.PathObject', 'Blockly.utils.Svg', 'Blockly.utils.colour', 'Blockly.utils.dom', 'Blockly.utils.object'], {'lang': 'es6', 'module': 'goog'});
 goog.addDependency('../../core/renderers/geras/renderer.js', ['Blockly.geras.Renderer'], ['Blockly.blockRendering', 'Blockly.blockRendering.Renderer', 'Blockly.geras.ConstantProvider', 'Blockly.geras.Drawer', 'Blockly.geras.HighlightConstantProvider', 'Blockly.geras.PathObject', 'Blockly.geras.RenderInfo', 'Blockly.utils.object']);
 goog.addDependency('../../core/renderers/measurables/base.js', ['Blockly.blockRendering.Measurable'], ['Blockly.blockRendering.Types']);
 goog.addDependency('../../core/renderers/measurables/connections.js', ['Blockly.blockRendering.Connection', 'Blockly.blockRendering.NextConnection', 'Blockly.blockRendering.OutputConnection', 'Blockly.blockRendering.PreviousConnection'], ['Blockly.blockRendering.Measurable', 'Blockly.blockRendering.Types', 'Blockly.utils.object']);