diff --git a/packages/dev-middleware/src/__tests__/InspectorProxyCdpRewritingHacks-test.js b/packages/dev-middleware/src/__tests__/InspectorProxyCdpRewritingHacks-test.js
index d3f57555f25e31..240046a53eb5d1 100644
--- a/packages/dev-middleware/src/__tests__/InspectorProxyCdpRewritingHacks-test.js
+++ b/packages/dev-middleware/src/__tests__/InspectorProxyCdpRewritingHacks-test.js
@@ -40,8 +40,7 @@ beforeAll(() => {
   jest.resetModules();
 });
 
-// TODO T169943794
-xdescribe.each(['HTTP', 'HTTPS'])(
+describe.each(['HTTP', 'HTTPS'])(
   'inspector proxy CDP rewriting hacks over %s',
   protocol => {
     const serverRef = withServerForEachTest({
diff --git a/packages/dev-middleware/src/__tests__/InspectorProxyCdpTransport-test.js b/packages/dev-middleware/src/__tests__/InspectorProxyCdpTransport-test.js
index 02298adbc1d1c9..6d76d304e84677 100644
--- a/packages/dev-middleware/src/__tests__/InspectorProxyCdpTransport-test.js
+++ b/packages/dev-middleware/src/__tests__/InspectorProxyCdpTransport-test.js
@@ -23,8 +23,7 @@ jest.useRealTimers();
 
 jest.setTimeout(10000);
 
-// TODO T169943794
-xdescribe.each(['HTTP', 'HTTPS'])(
+describe.each(['HTTP', 'HTTPS'])(
   'inspector proxy CDP transport over %s',
   protocol => {
     const serverRef = withServerForEachTest({
diff --git a/packages/dev-middleware/src/__tests__/InspectorProxyHttpApi-test.js b/packages/dev-middleware/src/__tests__/InspectorProxyHttpApi-test.js
index 55128934464a2b..125433757edad1 100644
--- a/packages/dev-middleware/src/__tests__/InspectorProxyHttpApi-test.js
+++ b/packages/dev-middleware/src/__tests__/InspectorProxyHttpApi-test.js
@@ -24,8 +24,7 @@ const PAGES_POLLING_DELAY = 1000;
 
 jest.useFakeTimers();
 
-// TODO T169943794
-xdescribe('inspector proxy HTTP API', () => {
+describe('inspector proxy HTTP API', () => {
   const serverRef = withServerForEachTest({
     logger: undefined,
     projectRoot: '',
diff --git a/packages/dev-middleware/src/__tests__/InspectorProxyReactNativeReloads-test.js b/packages/dev-middleware/src/__tests__/InspectorProxyReactNativeReloads-test.js
index e8ca5607e91621..8576c98dbbce1d 100644
--- a/packages/dev-middleware/src/__tests__/InspectorProxyReactNativeReloads-test.js
+++ b/packages/dev-middleware/src/__tests__/InspectorProxyReactNativeReloads-test.js
@@ -23,8 +23,7 @@ jest.useRealTimers();
 
 jest.setTimeout(10000);
 
-// TODO T169943794
-xdescribe('inspector proxy React Native reloads', () => {
+describe('inspector proxy React Native reloads', () => {
   const serverRef = withServerForEachTest({
     logger: undefined,
     projectRoot: '',
diff --git a/scripts/build/babel-register.js b/scripts/build/babel-register.js
index a9f99c4fdb429d..f2f1c4eeebb7a4 100644
--- a/scripts/build/babel-register.js
+++ b/scripts/build/babel-register.js
@@ -50,7 +50,7 @@ function registerPackage(packageName /*: string */) {
   const registerConfig = {
     ...getBabelConfig(packageName),
     root: packageDir,
-    ignore: [/\/node_modules\//],
+    ignore: [/[/\\]node_modules[/\\]/],
   };
 
   require('@babel/register')(registerConfig);