diff --git a/core/renderers/common/constants.js b/core/renderers/common/constants.js
index cc1bf6edb..9bd0f20a4 100644
--- a/core/renderers/common/constants.js
+++ b/core/renderers/common/constants.js
@@ -82,8 +82,29 @@ Blockly.blockRendering.ConstantProvider = function() {
   this.STATEMENT_INPUT_PADDING_LEFT = 20;
   this.BETWEEN_STATEMENT_PADDING_Y = 4;
 
-  // The minimum height of the bottom row following a statement input.
-  this.AFTER_STATEMENT_BOTTOM_ROW_MIN_HEIGHT = this.LARGE_PADDING;
+  /**
+   * The top row's minimum height.
+   * @type {number}
+   */
+  this.TOP_ROW_MIN_HEIGHT = this.MEDIUM_PADDING;
+
+  /**
+   * The top row's minimum height if it precedes a statement.
+   * @type {number}
+   */
+  this.TOP_ROW_PRECEDES_STATEMENT_MIN_HEIGHT = this.LARGE_PADDING;
+
+  /**
+   * The bottom row's minimum height.
+   * @type {number}
+   */
+  this.BOTTOM_ROW_MIN_HEIGHT = this.MEDIUM_PADDING;
+
+  /**
+   * The bottom row's minimum height if it follows a statement input.
+   * @type {number}
+   */
+  this.BOTTOM_ROW_AFTER_STATEMENT_MIN_HEIGHT = this.LARGE_PADDING;
 
   // This is the max width of a bottom row that follows a statement input and
   // has inputs inline.
diff --git a/core/renderers/common/info.js b/core/renderers/common/info.js
index 8ebe44a0c..6a41b470d 100644
--- a/core/renderers/common/info.js
+++ b/core/renderers/common/info.js
@@ -286,9 +286,10 @@ Blockly.blockRendering.RenderInfo.prototype.populateTopRow_ = function() {
   // This is the minimum height for the row. If one of its elements has a
   // greater height it will be overwritten in the compute pass.
   if (precedesStatement && !this.block_.isCollapsed()) {
-    this.topRow.minHeight = this.constants_.LARGE_PADDING;
+    this.topRow.minHeight =
+        this.constants_.TOP_ROW_PRECEDES_STATEMENT_MIN_HEIGHT;
   } else {
-    this.topRow.minHeight = this.constants_.MEDIUM_PADDING;
+    this.topRow.minHeight = this.constants_.TOP_ROW_MIN_HEIGHT;
   }
 
   var rightSquareCorner = this.topRow.hasRightSquareCorner(this.block_);
@@ -318,9 +319,9 @@ Blockly.blockRendering.RenderInfo.prototype.populateBottomRow_ = function() {
   // greater height it will be overwritten in the compute pass.
   if (followsStatement) {
     this.bottomRow.minHeight =
-      this.constants_.AFTER_STATEMENT_BOTTOM_ROW_MIN_HEIGHT;
+      this.constants_.BOTTOM_ROW_AFTER_STATEMENT_MIN_HEIGHT;
   } else {
-    this.bottomRow.minHeight = this.constants_.MEDIUM_PADDING;
+    this.bottomRow.minHeight = this.constants_.BOTTOM_ROW_MIN_HEIGHT;
   }
 
   var leftSquareCorner = this.bottomRow.hasLeftSquareCorner(this.block_);
diff --git a/core/renderers/zelos/constants.js b/core/renderers/zelos/constants.js
index 9b1c980a9..ea12bad23 100644
--- a/core/renderers/zelos/constants.js
+++ b/core/renderers/zelos/constants.js
@@ -91,6 +91,21 @@ Blockly.zelos.ConstantProvider = function() {
    */
   this.TAB_OFFSET_FROM_TOP = 0;
 
+  /**
+   * @override
+   */
+  this.TOP_ROW_MIN_HEIGHT = this.GRID_UNIT;
+
+  /**
+   * @override
+   */
+  this.BOTTOM_ROW_MIN_HEIGHT = this.GRID_UNIT;
+
+  /**
+   * @override
+   */
+  this.BOTTOM_ROW_AFTER_STATEMENT_MIN_HEIGHT = 7 * this.GRID_UNIT;
+
   /**
    * @override
    */
@@ -107,11 +122,6 @@ Blockly.zelos.ConstantProvider = function() {
    */
   this.STATEMENT_INPUT_PADDING_LEFT = 4 * this.GRID_UNIT;
 
-  /**
-   * @override
-   */
-  this.AFTER_STATEMENT_BOTTOM_ROW_MIN_HEIGHT = 7 * this.GRID_UNIT;
-
   /**
    * @override
    */
diff --git a/core/renderers/zelos/info.js b/core/renderers/zelos/info.js
index 4060fbdbb..4a124580f 100644
--- a/core/renderers/zelos/info.js
+++ b/core/renderers/zelos/info.js
@@ -109,6 +109,27 @@ Blockly.zelos.RenderInfo.prototype.computeBounds_ = function() {
   }
 };
 
+/**
+ * @override
+ */
+Blockly.zelos.RenderInfo.prototype.getInRowSpacing_ = function(prev, next) {
+  if (!prev || !next) {
+    // No need for padding at the beginning or end of the row if the
+    // output shape is dynamic.
+    if (this.outputConnection && this.outputConnection.isDynamicShape) {
+      return this.constants_.NO_PADDING;
+    }
+  }
+  // Spacing between a rounded corner and a previous or next connection.
+  if (prev && Blockly.blockRendering.Types.isLeftRoundedCorner(prev) && next) {
+    if (Blockly.blockRendering.Types.isPreviousConnection(next) ||
+      Blockly.blockRendering.Types.isNextConnection(next)) {
+      return next.notchOffset - this.constants_.CORNER_RADIUS;
+    }
+  }
+  return this.constants_.MEDIUM_PADDING;
+};
+
 /**
  * @override
  */
diff --git a/tests/rendering/zelos/zelos.html b/tests/rendering/zelos/zelos.html
index d1fd73706..7aa679e2c 100644
--- a/tests/rendering/zelos/zelos.html
+++ b/tests/rendering/zelos/zelos.html
@@ -32,9 +32,6 @@
   <script>
     goog.require('Blockly.blockRendering.Debug');
     goog.require('Blockly.zelos.Renderer');
-    Blockly.Field.FONTSIZE = 12;
-    Blockly.Field.FONTWEIGHT = 'bold';
-    Blockly.Field.FONTFAMILY = 'Helvetica Neue';
     // Blockly.blockRendering.startDebugger();
     var blocklyDiv = document.getElementById('blocklyDiv');
     var workspace;
@@ -63,6 +60,10 @@
           startScale: 2,
         }
       });
+      var constants = workspace.getRenderer().getConstants();
+      constants.FIELD_TEXT_FONTSIZE = 12;
+      constants.FIELD_TEXT_FONTWEIGHT = 'bold';
+      constants.FIELD_TEXT_FONTFAMILY = 'Helvetica Neue';
 
       try {
         Blockly.Xml.domToWorkspace(Blockly.Xml.textToDom(xml), workspace);