diff --git a/lib/binding_web/test/node-test.js b/lib/binding_web/test/node-test.js
index a87658c7..a1011154 100644
--- a/lib/binding_web/test/node-test.js
+++ b/lib/binding_web/test/node-test.js
@@ -454,4 +454,20 @@ describe("Node", () => {
       assert(!node1.equals(node2));
     });
   });
+
+  describe('.fieldNameForChild(index)', () => {
+    it('returns the field of a child or null', () => {
+      tree = parser.parse('let a = 5');
+
+      const noField = tree.rootNode.fieldNameForChild(0);
+      const name = tree.rootNode.firstChild.children[1].fieldNameForChild(0);
+      const value = tree.rootNode.firstChild.children[1].fieldNameForChild(2);
+      const overflow = tree.rootNode.firstChild.children[1].fieldNameForChild(3);
+
+      assert.equal(noField, null);
+      assert.equal(name, 'name');
+      assert.equal(value, 'value');
+      assert.equal(overflow, null);
+    });
+  });
 });