diff --git a/identity-server/src/IdentityServer/Internal/Saml/SingleSignin/SamlSigninStateIdCookie.cs b/identity-server/src/IdentityServer/Internal/Saml/SingleSignin/SamlSigninStateIdCookie.cs
index a6818049c..4b8aca936 100644
--- a/identity-server/src/IdentityServer/Internal/Saml/SingleSignin/SamlSigninStateIdCookie.cs
+++ b/identity-server/src/IdentityServer/Internal/Saml/SingleSignin/SamlSigninStateIdCookie.cs
@@ -9,7 +9,7 @@ namespace Duende.IdentityServer.Internal.Saml.SingleSignin;
 
 internal class SamlSigninStateIdCookie(IHttpContextAccessor httpContextAccessor)
 {
-    private const string CookieName = "__IdsSvr_SamlSigninState";
+    private const string CookieName = "__Host-idsrv.SamlSigninState";
     private static readonly TimeSpan CookieLifetime = TimeSpan.FromMinutes(5);
 
     private HttpContext HttpContext => httpContextAccessor.HttpContext
diff --git a/identity-server/test/IdentityServer.IntegrationTests/Endpoints/Saml/SamlTestHelpers.cs b/identity-server/test/IdentityServer.IntegrationTests/Endpoints/Saml/SamlTestHelpers.cs
index a2c931a21..7d00b1767 100644
--- a/identity-server/test/IdentityServer.IntegrationTests/Endpoints/Saml/SamlTestHelpers.cs
+++ b/identity-server/test/IdentityServer.IntegrationTests/Endpoints/Saml/SamlTestHelpers.cs
@@ -541,7 +541,7 @@ internal static class SamlTestHelpers
             return null;
         }
 
-        var targetCookie = cookieHeaderValues.FirstOrDefault(cookie => cookie.Name == "__IdsSvr_SamlSigninState");
+        var targetCookie = cookieHeaderValues.FirstOrDefault(cookie => cookie.Name == "__Host-idsrv.SamlSigninState");
 
         return targetCookie?.Value.ToString();
     }