diff --git a/tests/acceptance/Features/EenDocumentTermijnVerlopen.feature b/tests/acceptance/Features/EenDocumentTermijnVerlopen.feature
index 7ec02bf..9158d90 100644
--- a/tests/acceptance/Features/EenDocumentTermijnVerlopen.feature
+++ b/tests/acceptance/Features/EenDocumentTermijnVerlopen.feature
@@ -14,6 +14,7 @@ Feature: Een documenttermijn laten verlopen
     When the 30-day document timer fires
     And the document-timeout worker runs
     Then the registration is verlopen
+    And the zaak is cancelled in ZGW
 
   Scenario: Tijdig aangeleverde documenten laten de registratie niet vervallen
     Given a registration parked at the WachtOpDocumenten task
@@ -21,3 +22,4 @@ Feature: Een documenttermijn laten verlopen
     And the 30-day document timer fires
     And the document-timeout worker runs
     Then the registration is not verlopen
+    And the zaak is not cancelled in ZGW
diff --git a/tests/acceptance/Steps/EenDocumentTermijnVerlopenSteps.cs b/tests/acceptance/Steps/EenDocumentTermijnVerlopenSteps.cs
index 402cfde..59ebdee 100644
--- a/tests/acceptance/Steps/EenDocumentTermijnVerlopenSteps.cs
+++ b/tests/acceptance/Steps/EenDocumentTermijnVerlopenSteps.cs
@@ -17,8 +17,11 @@ namespace Acceptance.Steps;
 [Scope(Feature = "Een documenttermijn laten verlopen")]
 public sealed class EenDocumentTermijnVerlopenSteps
 {
+    private static readonly Uri ZaakUrl = new("http://openzaak/zaken/api/v1/zaken/acc-timeout");
+
     private readonly InMemoryDocumentTimeoutClient _flowable = new();
     private readonly Support.InMemoryRegistrationStore _store = new();
+    private readonly InMemoryAclClient _acl = new();
     private Registration _registration = null!;
     private string _processInstanceId = "";
 
@@ -26,6 +29,9 @@ public sealed class EenDocumentTermijnVerlopenSteps
     public async Task GivenARegistrationParkedAtWachtOpDocumenten()
     {
         _registration = Registration.Submit("123456782");
+        // By the time it parks at WachtOpDocumenten its zaak has been opened (OpenZaakAanmaken runs
+        // earlier), so a timeout has a zaak to cancel.
+        _registration.AttachZaak(ZaakUrl);
         await _store.SaveAsync(_registration);
         _processInstanceId = _flowable.ParkWaitingForDocuments(_registration.Id);
     }
@@ -39,7 +45,7 @@ public sealed class EenDocumentTermijnVerlopenSteps
     [When("the document-timeout worker runs")]
     public async Task WhenTheTimeoutWorkerRuns()
         => await new RegistratieVerlopenProcessor(
-            _flowable, new ExpireRegistrationWorker(_store),
+            _flowable, new ExpireRegistrationWorker(_store, _acl),
             NullLogger<RegistratieVerlopenProcessor>.Instance).PumpOnceAsync(5);
 
     [Then("the registration is verlopen")]
@@ -49,4 +55,10 @@ public sealed class EenDocumentTermijnVerlopenSteps
     [Then("the registration is not verlopen")]
     public async Task ThenTheRegistrationIsNotVerlopen()
         => Assert.Equal(RegistrationStatus.Ingediend, (await _store.GetAsync(_registration.Id))!.Status);
+
+    [Then("the zaak is cancelled in ZGW")]
+    public void ThenTheZaakIsCancelled() => Assert.Equal(ZaakUrl, _acl.CancelledZaakUrl);
+
+    [Then("the zaak is not cancelled in ZGW")]
+    public void ThenTheZaakIsNotCancelled() => Assert.Null(_acl.CancelledZaakUrl);
 }