diff --git a/src/index.ts b/src/index.ts
index a9c82f5..e923f98 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -99,24 +99,70 @@ const SHOW_ELEMENT = 1;
 const SHOW_COMMENT = 128;
 const COMMENT_NODE = 8;
 export function defaultNormalizer(container: ContainerNode) {
+  const idMap: Map<string, number> = new Map();
   const clone = container.cloneNode(true) as ContainerNode;
   const document = container.ownerDocument!;
-  const treeWalker = document.createTreeWalker(
+  const commentAndElementWalker = document.createTreeWalker(
     clone,
     SHOW_ELEMENT | SHOW_COMMENT
   );
 
   let node: Comment | Element;
-  let nextNode = treeWalker.nextNode();
+  let nextNode = commentAndElementWalker.nextNode();
   while ((node = nextNode as Comment | Element)) {
-    nextNode = treeWalker.nextNode();
-    if (node.nodeType === COMMENT_NODE) {
-      (node as Comment).remove();
+    nextNode = commentAndElementWalker.nextNode();
+    if (isComment(node)) {
+      node.remove();
     } else {
-      Array.from((node as Element).attributes)
-        .map(attr => attr.name)
-        .filter(attrName => /^data-(w-|widget$|marko(-|$))/.test(attrName))
-        .forEach(attrName => (node as Element).removeAttribute(attrName));
+      const { id, attributes } = node;
+      if (/\d/.test(id)) {
+        let idIndex = idMap.get(id);
+
+        if (idIndex === undefined) {
+          idIndex = idMap.size;
+          idMap.set(id, idIndex);
+        }
+
+        node.id = `GENERATED-${idIndex}`;
+      }
+
+      for (let i = attributes.length; i--; ) {
+        const attr = attributes[i];
+
+        if (/^data-(w-|widget$|marko(-|$))/.test(attr.name)) {
+          node.removeAttributeNode(attr);
+        }
+      }
+    }
+  }
+
+  if (idMap.size) {
+    const elementWalker = document.createTreeWalker(clone, SHOW_ELEMENT);
+
+    nextNode = elementWalker.nextNode();
+    while ((node = nextNode as Element)) {
+      nextNode = elementWalker.nextNode();
+      const { attributes } = node;
+
+      for (let i = attributes.length; i--; ) {
+        const attr = attributes[i];
+        const { value } = attr;
+        const updated = value
+          .split(" ")
+          .map(part => {
+            const idIndex = idMap.get(part);
+            if (idIndex === undefined) {
+              return part;
+            }
+
+            return `GENERATED-${idIndex}`;
+          })
+          .join(" ");
+
+        if (value !== updated) {
+          attr.value = updated;
+        }
+      }
     }
   }
 
@@ -132,3 +178,7 @@ function inferName(p: string) {
   const indexOrTemplate = match[2] === "index" || match[2] === "template";
   return indexOrTemplate ? match[1] : match[2];
 }
+
+function isComment(node: Node): node is Comment {
+  return node.nodeType === COMMENT_NODE;
+}
diff --git a/test/components/fancy-form/fixtures/data.html b/test/components/fancy-form/fixtures/data.html
new file mode 100644
index 0000000..3c7043c
--- /dev/null
+++ b/test/components/fancy-form/fixtures/data.html
@@ -0,0 +1,20 @@
+<label
+  for="GENERATED-0"
+>
+  First Name
+</label>
+<input
+  id="GENERATED-0"
+  name="firstName"
+  value="Michael"
+/>
+<label
+  for="GENERATED-1"
+>
+  Last Name
+</label>
+<input
+  id="GENERATED-1"
+  name="lastName"
+  value="Rawlings"
+/>
\ No newline at end of file
diff --git a/test/components/fancy-form/fixtures/data.json b/test/components/fancy-form/fixtures/data.json
new file mode 100644
index 0000000..9d061d3
--- /dev/null
+++ b/test/components/fancy-form/fixtures/data.json
@@ -0,0 +1,4 @@
+{
+  "firstName": "Michael",
+  "lastName": "Rawlings"
+}
diff --git a/test/components/fancy-form/index.marko b/test/components/fancy-form/index.marko
new file mode 100644
index 0000000..dc4217a
--- /dev/null
+++ b/test/components/fancy-form/index.marko
@@ -0,0 +1,5 @@
+<label for:scoped="first-name">First Name</label>
+<input id:scoped="first-name" name="firstName" value=input.firstName>
+
+<label for:scoped="last-name">Last Name</label>
+<input id:scoped="last-name" name="lastName" value=input.lastName>
\ No newline at end of file
diff --git a/test/index.test.ts b/test/index.test.ts
index 441b018..0fbed20 100644
--- a/test/index.test.ts
+++ b/test/index.test.ts
@@ -87,6 +87,25 @@ describe("findProjectFixtures", () => {
           "name": "container",
           "path": "(cwd)/test/components/container/index.marko",
         },
+        Object {
+          "component": [Component "(cwd)/test/components/fancy-form/index.marko"],
+          "fixtures": Object {
+            "data": Object {
+              "ext": ".json",
+              "fixture": Object {
+                "firstName": "Michael",
+                "lastName": "Rawlings",
+              },
+              "name": "data",
+              "path": "(cwd)/test/components/fancy-form/fixtures/data.json",
+              "render": [Function],
+              "toString": [Function],
+            },
+          },
+          "fixturesPath": "(cwd)/test/components/fancy-form/fixtures",
+          "name": "fancy-form",
+          "path": "(cwd)/test/components/fancy-form/index.marko",
+        },
         Object {
           "component": [Component "(cwd)/test/components/hello/index.marko"],
           "fixtures": Object {