diff --git a/core/renderers/block_rendering_rewrite/block_render_draw.js b/core/renderers/block_rendering_rewrite/block_render_draw.js
index 9ac74df82..e38e4e6fb 100644
--- a/core/renderers/block_rendering_rewrite/block_render_draw.js
+++ b/core/renderers/block_rendering_rewrite/block_render_draw.js
@@ -69,7 +69,8 @@ Blockly.blockRendering.Drawer.prototype.draw_ = function() {
   this.pathObject_.inlineSteps = [this.inlinePath_];
 
   this.block_.setPaths_(this.pathObject_);
-  this.block_.renderingDebugger.drawDebug(this.block_, this.info_);
+  // Uncomment to enable debug rendering.
+  // this.block_.renderingDebugger.drawDebug(this.block_, this.info_);
   this.recordSizeOnBlock_();
 };