diff --git a/apps/react-strict-dom-demo/test/dev.test.ts b/apps/react-strict-dom-demo/test/dev.test.ts
index 1f099a3..24e1b86 100644
--- a/apps/react-strict-dom-demo/test/dev.test.ts
+++ b/apps/react-strict-dom-demo/test/dev.test.ts
@@ -1,11 +1,9 @@
 import { describe, test, beforeEach, afterEach } from "node:test";
 import * as vite from "vite";
-import path from "path";
 import {
   Browser,
   openBrowser,
   closeBrowser,
-  runtimeInjectionTest,
   hmrTest,
   cleanHmrTest,
   friendlyClassNameTest,
@@ -45,13 +43,6 @@ describe("dev", () => {
     await closeBrowser(browser);
   });
 
-  test("runtime injection works", async () => {
-    const page = await browser.newPage();
-    await page.goto(serverUrl);
-
-    await runtimeInjectionTest(page);
-  });
-
   test("friendly classnames work", async () => {
     const page = await browser.newPage();
     await page.goto(serverUrl);
diff --git a/apps/storybook-demo/test/dev.test.ts b/apps/storybook-demo/test/dev.test.ts
index 89b1f8d..7459f49 100644
--- a/apps/storybook-demo/test/dev.test.ts
+++ b/apps/storybook-demo/test/dev.test.ts
@@ -3,7 +3,6 @@ import {
   Browser,
   openBrowser,
   closeBrowser,
-  runtimeInjectionTest,
   hmrTest,
   cleanHmrTest,
   friendlyClassNameTest,
@@ -56,13 +55,6 @@ describe("dev", () => {
     await killPortProcess(port);
   });
 
-  test("runtime injection works", async () => {
-    const page = await browser.newPage();
-    await page.goto(previewUrl);
-
-    await runtimeInjectionTest(page);
-  });
-
   test("friendly classnames work", async () => {
     const page = await browser.newPage();
     await page.goto(previewUrl);
diff --git a/apps/vite-demo/test/dev.test.ts b/apps/vite-demo/test/dev.test.ts
index 1f099a3..24e1b86 100644
--- a/apps/vite-demo/test/dev.test.ts
+++ b/apps/vite-demo/test/dev.test.ts
@@ -1,11 +1,9 @@
 import { describe, test, beforeEach, afterEach } from "node:test";
 import * as vite from "vite";
-import path from "path";
 import {
   Browser,
   openBrowser,
   closeBrowser,
-  runtimeInjectionTest,
   hmrTest,
   cleanHmrTest,
   friendlyClassNameTest,
@@ -45,13 +43,6 @@ describe("dev", () => {
     await closeBrowser(browser);
   });
 
-  test("runtime injection works", async () => {
-    const page = await browser.newPage();
-    await page.goto(serverUrl);
-
-    await runtimeInjectionTest(page);
-  });
-
   test("friendly classnames work", async () => {
     const page = await browser.newPage();
     await page.goto(serverUrl);
diff --git a/apps/vue-demo/test/dev.test.ts b/apps/vue-demo/test/dev.test.ts
index c2a530b..38873ba 100644
--- a/apps/vue-demo/test/dev.test.ts
+++ b/apps/vue-demo/test/dev.test.ts
@@ -4,7 +4,6 @@ import {
   Browser,
   openBrowser,
   closeBrowser,
-  runtimeInjectionTest,
   hmrTest,
   cleanHmrTest,
   friendlyClassNameTest,
@@ -43,13 +42,6 @@ describe("dev", () => {
     await closeBrowser(browser);
   });
 
-  test("runtime injection works", async () => {
-    const page = await browser.newPage();
-    await page.goto(serverUrl);
-
-    await runtimeInjectionTest(page);
-  });
-
   test("friendly classnames work", async () => {
     const page = await browser.newPage();
     await page.goto(serverUrl);
diff --git a/packages/test-utils/src/devTests.mts b/packages/test-utils/src/devTests.mts
index a5db390..c84b76f 100644
--- a/packages/test-utils/src/devTests.mts
+++ b/packages/test-utils/src/devTests.mts
@@ -4,16 +4,6 @@ import * as fs from "node:fs/promises";
 export const CARD_SELECTOR = `[data-testId='card']`;
 const CARD_FRIENDLY_CLASSNAME = `Card__styles.root`;
 
-export async function runtimeInjectionTest(page: Page) {
-  await page.waitForSelector("[data-stylex='true']", {
-    state: "attached",
-  });
-
-  await page.waitForSelector(CARD_SELECTOR, {
-    state: "visible",
-  });
-}
-
 export async function hmrTest(page: Page, cardComponentPath: string) {
   await page.waitForSelector(CARD_SELECTOR, {
     state: "visible",