diff --git a/packages/puppeteer-core/src/injected/TextContent.ts b/packages/puppeteer-core/src/injected/TextContent.ts
index 9798b171d66e0..1916cf5c7983c 100644
--- a/packages/puppeteer-core/src/injected/TextContent.ts
+++ b/packages/puppeteer-core/src/injected/TextContent.ts
@@ -146,6 +146,7 @@ export const createTextContent = (root: Node): TextContent => {
       textChangeObserver.observe(root, {
         childList: true,
         characterData: true,
+        subtree: true,
       });
       observedNodes.add(root);
     }