diff --git a/packages/enzyme-adapter-react-16/src/ReactSixteenAdapter.js b/packages/enzyme-adapter-react-16/src/ReactSixteenAdapter.js
index fecc1024a..856df857b 100644
--- a/packages/enzyme-adapter-react-16/src/ReactSixteenAdapter.js
+++ b/packages/enzyme-adapter-react-16/src/ReactSixteenAdapter.js
@@ -87,8 +87,21 @@ function toTree(vnode) {
   switch (node.tag) {
     case HostRoot: // 3
       return childrenToTree(node.child);
-    case HostPortal: // 4
-      return childrenToTree(node.child);
+    case HostPortal: { // 4
+      let renderedNodes = flatten(nodeAndSiblingsArray(node.child).map(toTree));
+      if (renderedNodes.length === 0) {
+        renderedNodes = [node.memoizedProps.children];
+      }
+      return {
+        nodeType: 'portal',
+        type: node.type,
+        props: { ...node.memoizedProps },
+        key: ensureKeyOrUndefined(node.key),
+        ref: node.ref,
+        instance: null,
+        rendered: renderedNodes,
+      };
+    }
     case ClassComponent:
       return {
         nodeType: 'class',