diff --git a/packages/react-dom-bindings/src/client/ReactDOMComponent.js b/packages/react-dom-bindings/src/client/ReactDOMComponent.js
index 81ecb2685cefb..24083f509981c 100644
--- a/packages/react-dom-bindings/src/client/ReactDOMComponent.js
+++ b/packages/react-dom-bindings/src/client/ReactDOMComponent.js
@@ -712,7 +712,7 @@ function setProp(
     case 'disableRemotePlayback':
     case 'formNoValidate':
     case 'hidden':
-    case 'inert':
+    case enableNewBooleanProps ? 'inert' : 'formNoValidate':
     case 'loop':
     case 'noModule':
     case 'noValidate':
@@ -724,18 +724,14 @@ function setProp(
     case 'scoped':
     case 'seamless':
     case 'itemScope': {
-      const isNewBooleanProp = key === 'inert';
-      if (enableNewBooleanProps || !isNewBooleanProp) {
-        if (value && typeof value !== 'function' && typeof value !== 'symbol') {
-          domElement.setAttribute(key, '');
-        } else {
-          domElement.removeAttribute(key);
-        }
-        break;
+      if (value && typeof value !== 'function' && typeof value !== 'symbol') {
+        domElement.setAttribute(key, '');
+      } else {
+        domElement.removeAttribute(key);
       }
+      break;
     }
     // Overloaded Boolean
-    // eslint-disable-next-line no-fallthrough -- Re-enable once enableNewBooleanProps is removed.
     case 'capture':
     case 'download': {
       // An attribute that can be used as a flag as well as with a value.
@@ -2491,7 +2487,7 @@ function diffHydratedGenericElement(
       case 'disableRemotePlayback':
       case 'formNoValidate':
       case 'hidden':
-      case 'inert':
+      case enableNewBooleanProps ? 'inert' : 'formNoValidate':
       case 'loop':
       case 'noModule':
       case 'noValidate':
@@ -2503,20 +2499,16 @@ function diffHydratedGenericElement(
       case 'scoped':
       case 'seamless':
       case 'itemScope': {
-        const isNewBooleanProp = propKey === 'inert';
-        if (enableNewBooleanProps || !isNewBooleanProp) {
-          // Some of these need to be lower case to remove them from the extraAttributes list.
-          hydrateBooleanAttribute(
-            domElement,
-            propKey,
-            propKey.toLowerCase(),
-            value,
-            extraAttributes,
-          );
-          continue;
-        }
+        // Some of these need to be lower case to remove them from the extraAttributes list.
+        hydrateBooleanAttribute(
+          domElement,
+          propKey,
+          propKey.toLowerCase(),
+          value,
+          extraAttributes,
+        );
+        continue;
       }
-      // eslint-disable-next-line no-fallthrough -- Re-enable once enableNewBooleanProps is removed.
       case 'capture':
       case 'download': {
         hydrateOverloadedBooleanAttribute(
diff --git a/packages/react-dom-bindings/src/server/ReactFizzConfigDOM.js b/packages/react-dom-bindings/src/server/ReactFizzConfigDOM.js
index 40f0774f08a51..0739ee2d8e571 100644
--- a/packages/react-dom-bindings/src/server/ReactFizzConfigDOM.js
+++ b/packages/react-dom-bindings/src/server/ReactFizzConfigDOM.js
@@ -1295,7 +1295,7 @@ function pushAttribute(
     case 'disableRemotePlayback':
     case 'formNoValidate':
     case 'hidden':
-    case 'inert':
+    case enableNewBooleanProps ? 'inert' : 'formNoValidate':
     case 'loop':
     case 'noModule':
     case 'noValidate':
@@ -1307,20 +1307,16 @@ function pushAttribute(
     case 'scoped':
     case 'seamless':
     case 'itemScope': {
-      const isNewBooleanProp = name === 'inert';
-      if (enableNewBooleanProps || !isNewBooleanProp) {
-        // Boolean
-        if (value && typeof value !== 'function' && typeof value !== 'symbol') {
-          target.push(
-            attributeSeparator,
-            stringToChunk(name),
-            attributeEmptyString,
-          );
-        }
-        return;
+      // Boolean
+      if (value && typeof value !== 'function' && typeof value !== 'symbol') {
+        target.push(
+          attributeSeparator,
+          stringToChunk(name),
+          attributeEmptyString,
+        );
       }
+      return;
     }
-    // eslint-disable-next-line no-fallthrough -- Re-enable once enableNewBooleanProps is removed.
     case 'capture':
     case 'download': {
       // Overloaded Boolean
diff --git a/packages/react-dom-bindings/src/shared/ReactDOMUnknownPropertyHook.js b/packages/react-dom-bindings/src/shared/ReactDOMUnknownPropertyHook.js
index cb7f47e9a7e77..8f8f9ae9f2580 100644
--- a/packages/react-dom-bindings/src/shared/ReactDOMUnknownPropertyHook.js
+++ b/packages/react-dom-bindings/src/shared/ReactDOMUnknownPropertyHook.js
@@ -224,6 +224,7 @@ function validateProperty(tagName, name, value, eventRegistry) {
           case 'disableRemotePlayback':
           case 'formNoValidate':
           case 'hidden':
+          case enableNewBooleanProps ? 'inert' : 'formNoValidate':
           case 'loop':
           case 'noModule':
           case 'noValidate':
@@ -241,10 +242,6 @@ function validateProperty(tagName, name, value, eventRegistry) {
             return true;
           }
           default: {
-            // TODO: Move into above cases once enableNewBooleanProps is removed.
-            if (enableNewBooleanProps && name === 'inert') {
-              return true;
-            }
             const prefix = name.toLowerCase().slice(0, 5);
             if (prefix === 'data-' || prefix === 'aria-') {
               return true;
@@ -305,6 +302,7 @@ function validateProperty(tagName, name, value, eventRegistry) {
             case 'disableRemotePlayback':
             case 'formNoValidate':
             case 'hidden':
+            case enableNewBooleanProps ? 'inert' : 'formNoValidate':
             case 'loop':
             case 'noModule':
             case 'noValidate':
@@ -318,11 +316,6 @@ function validateProperty(tagName, name, value, eventRegistry) {
             case 'itemScope': {
               break;
             }
-            case 'inert':
-              if (enableNewBooleanProps) {
-                break;
-              }
-            // eslint-disable-next-line no-fallthrough -- not flagged after DCE
             default: {
               return true;
             }