diff --git a/frontend/playwright.config.js b/frontend/playwright.config.js
index 73245e3ce..08a372946 100644
--- a/frontend/playwright.config.js
+++ b/frontend/playwright.config.js
@@ -28,6 +28,8 @@ export default defineConfig({
 
     /* Collect trace when retrying the failed test. See https://playwright.dev/docs/trace-viewer */
     trace: "on-first-retry",
+
+    locale: "en-US"
   },
 
   /* Configure projects for major browsers */
diff --git a/frontend/playwright/fixtures/login-with-password-error.json b/frontend/playwright/fixtures/login-with-password-error.json
new file mode 100644
index 000000000..c54589e42
--- /dev/null
+++ b/frontend/playwright/fixtures/login-with-password-error.json
@@ -0,0 +1,4 @@
+{
+  "~:type": "~:validation",
+  "~:code": "~:wrong-credentials"
+}
diff --git a/frontend/playwright/helpers/index.js b/frontend/playwright/helpers/index.js
index 50f7e5487..419dfa918 100644
--- a/frontend/playwright/helpers/index.js
+++ b/frontend/playwright/helpers/index.js
@@ -1,7 +1,12 @@
-export const interceptRPC = async (page, path, jsonFilename) => {
+export const interceptRPC = async (page, path, jsonFilename, options = {}) => {
+  const interceptConfig = {
+    status: 200,
+    ...options
+  };
+
   await page.route(`**/api/rpc/command/${path}`, (route) => {
     route.fulfill({
-      status: 200,
+      ...interceptConfig,
       contentType: "application/transit+json",
       path: `playwright/fixtures/${jsonFilename}`,
     });
diff --git a/frontend/playwright/login.spec.js b/frontend/playwright/login.spec.js
index 5463a74f2..5b10ca2ce 100644
--- a/frontend/playwright/login.spec.js
+++ b/frontend/playwright/login.spec.js
@@ -37,7 +37,16 @@ test("Shows login page when going to index and user is logged out", async ({ pag
   await page.goto("/");
 
   await expect(page).toHaveURL(/auth\/login$/);
-  await expect(page.getByText("Log into my account")).toBeVisible();
+  await expect(page.getByRole("heading", { name: "Log into my account" } )).toBeVisible();
+});
+
+test("User submit a wrong formated email ", async ({ page }) => {
+  await interceptRPC(page, "get-profile", "get-profile-anonymous.json");
+  await page.goto("/");
+  await page.getByLabel("Email").fill("foo");
+
+  await expect(page).toHaveURL(/auth\/login$/);
+  await expect(page.getByText("Enter a valid email please")).toBeVisible();
 });
 
 test("User logs in by filling the login form", async ({ page }) => {
@@ -54,3 +63,18 @@ test("User logs in by filling the login form", async ({ page }) => {
 
   await expect(page).toHaveURL(/dashboard/);
 });
+
+test("User submits wrong credentials", async ({ page }) => {
+  await interceptRPC(page, "get-profile", "get-profile-anonymous.json");
+  await interceptRPC(page, "login-with-password", "login-with-password-error.json", { status: 400 });
+
+  await page.goto("/");
+
+  await page.getByLabel("Email").fill("foo123@example.com");
+  await page.getByLabel("Password").fill("aaaa");
+
+  await page.getByRole("button", { name: "Login" }).click();
+
+  await expect(page.getByText("Email or password is incorrect")).toBeVisible();
+  await expect(page).toHaveURL(/auth\/login$/);
+});