diff --git a/src/AliasVault.WebApp/Auth/Pages/Register.razor b/src/AliasVault.WebApp/Auth/Pages/Register.razor
index c6428b88d..be9a371bf 100644
--- a/src/AliasVault.WebApp/Auth/Pages/Register.razor
+++ b/src/AliasVault.WebApp/Auth/Pages/Register.razor
@@ -77,7 +77,10 @@
 
             if (!result.IsSuccessStatusCode)
             {
-                LoginBase.ParseResponse(responseContent);
+                foreach (var error in LoginBase.ParseResponse(responseContent))
+                {
+                    _serverValidationErrors.AddError(error);
+                }
                 StateHasChanged();
                 return;
             }
diff --git a/src/Tests/AliasVault.E2ETests/Common/PlaywrightTest.cs b/src/Tests/AliasVault.E2ETests/Common/PlaywrightTest.cs
index 52417af2e..303796ad2 100644
--- a/src/Tests/AliasVault.E2ETests/Common/PlaywrightTest.cs
+++ b/src/Tests/AliasVault.E2ETests/Common/PlaywrightTest.cs
@@ -241,7 +241,7 @@ public class PlaywrightTest
         await registerButton.ClickAsync();
         await WaitForURLAsync("**/user/register");
 
-        // Try to login with test credentials.
+        // Try to register an account with the generated test credentials.
         var emailField = Page.Locator("input[id='email']");
         var passwordField = Page.Locator("input[id='password']");
         var password2Field = Page.Locator("input[id='password2']");
@@ -255,7 +255,6 @@ public class PlaywrightTest
 
         // Check if we get redirected when clicking on the register button.
         var submitButton = Page.Locator("button[type='submit']");
-        Console.WriteLine(submitButton);
         await submitButton.ClickAsync();
 
         // Check if we get redirected to the root URL after registration which means we are logged in.
diff --git a/src/Tests/AliasVault.E2ETests/Tests/AuthTests.cs b/src/Tests/AliasVault.E2ETests/Tests/AuthTests.cs
index 97968bdd6..8f5a3a267 100644
--- a/src/Tests/AliasVault.E2ETests/Tests/AuthTests.cs
+++ b/src/Tests/AliasVault.E2ETests/Tests/AuthTests.cs
@@ -31,6 +31,45 @@ public class AuthTests : PlaywrightTest
         await Login();
     }
 
+    /// <summary>
+    /// Test if registering an account with the same email address as an existing account shows a warning.
+    /// </summary>
+    /// <returns>Async task.</returns>
+    [Test]
+    public async Task RegisterFormWarning()
+    {
+        // Logout.
+        await NavigateUsingBlazorRouter("user/logout");
+        await WaitForURLAsync("**/user/logout", "AliasVault");
+
+        // Wait and check if we get redirected to /user/login.
+        await WaitForURLAsync("**/user/login");
+
+        // Try to register a new account.
+        var registerButton = Page.Locator("a[href='/user/register']");
+        await registerButton.ClickAsync();
+        await WaitForURLAsync("**/user/register");
+
+        // Register account with same test credentials as used in the initial registration bootstrap method.
+        var emailField = Page.Locator("input[id='email']");
+        var passwordField = Page.Locator("input[id='password']");
+        var password2Field = Page.Locator("input[id='password2']");
+        await emailField.FillAsync(TestUserEmail);
+        await passwordField.FillAsync(TestUserPassword);
+        await password2Field.FillAsync(TestUserPassword);
+
+        // Check the terms of service checkbox
+        var termsCheckbox = Page.Locator("input[id='terms']");
+        await termsCheckbox.CheckAsync();
+
+        // Check if we get a visible warning when trying to register.
+        var submitButton = Page.Locator("button[type='submit']");
+        await submitButton.ClickAsync();
+
+        var warning = await Page.TextContentAsync("div[role='alert']");
+        Assert.That(warning, Does.Contain("is already taken."), "No visible warning when registering with existing email address.");
+    }
+
     /// <summary>
     /// Test if logging in works.
     /// </summary>