diff --git a/tests/Server/ZB.MOM.WW.OtOpcUa.Security.Tests/AuthEndpointsIntegrationTests.cs b/tests/Server/ZB.MOM.WW.OtOpcUa.Security.Tests/AuthEndpointsIntegrationTests.cs
index d3312771..59d893de 100644
--- a/tests/Server/ZB.MOM.WW.OtOpcUa.Security.Tests/AuthEndpointsIntegrationTests.cs
+++ b/tests/Server/ZB.MOM.WW.OtOpcUa.Security.Tests/AuthEndpointsIntegrationTests.cs
@@ -184,12 +184,13 @@ public sealed class AuthEndpointsIntegrationTests : IAsyncLifetime
         loginResponse.EnsureSuccessStatusCode();
 
         var logoutReq = new HttpRequestMessage(HttpMethod.Post, "/auth/logout");
+        logoutReq.Headers.Accept.ParseAdd("application/json");
         AttachCookies(logoutReq, loginResponse);
         var response = await client.SendAsync(logoutReq, Ct);
         response.StatusCode.ShouldBe(HttpStatusCode.NoContent);
 
         response.Headers.GetValues("Set-Cookie")
-            .ShouldContain(c => c.StartsWith("OtOpcUa.Auth=") && c.Contains("expires=", StringComparison.OrdinalIgnoreCase));
+            .ShouldContain(c => c.StartsWith("ZB.MOM.WW.OtOpcUa.Auth=") && c.Contains("expires=", StringComparison.OrdinalIgnoreCase));
     }
 
     /// <summary>Anonymous browser GET of a protected route redirects to /login with a ReturnUrl.</summary>