diff --git a/services/event-subscriber/EventSubscriber.Tests/NotificationProjectorTests.cs b/services/event-subscriber/EventSubscriber.Tests/NotificationProjectorTests.cs
index 39e733b..a5cc37f 100644
--- a/services/event-subscriber/EventSubscriber.Tests/NotificationProjectorTests.cs
+++ b/services/event-subscriber/EventSubscriber.Tests/NotificationProjectorTests.cs
@@ -38,13 +38,17 @@ public sealed class NotificationProjectorTests
         Assert.Equal("REG-2026-0001", entry.Reference);
     }
 
-    [Fact]
-    public async Task approval_updates_the_same_row_from_ingediend_to_ingeschreven()
+    // The ACL PATCHes the same object on approval. DRF routes a PATCH through `update()` but reports
+    // the action as `partial_update`, which is what Objecten puts in the notification — so accepting
+    // only `create`/`update` silently drops every approval.
+    [Theory]
+    [InlineData("partial_update")]
+    [InlineData("update")]
+    public async Task approval_updates_the_same_row_from_ingediend_to_ingeschreven(string actie)
     {
         var projector = Projector();
         await projector.HandleAsync(RecordWritten());
-        // The ACL PATCHes the same object on approval, so Objecten publishes an `update`.
-        await projector.HandleAsync(RecordWritten("update", status: RegistrationStatus.Ingeschreven));
+        await projector.HandleAsync(RecordWritten(actie, status: RegistrationStatus.Ingeschreven));
 
         var entry = Assert.Single(await _store.AllAsync());
         Assert.Equal(ZaakId, entry.Id);
@@ -112,7 +116,7 @@ public sealed class NotificationProjectorTests
     {
         var projector = Projector();
         await projector.HandleAsync(RecordWritten());
-        await projector.HandleAsync(RecordWritten("update", status: RegistrationStatus.Ingeschreven));
+        await projector.HandleAsync(RecordWritten("partial_update", status: RegistrationStatus.Ingeschreven));
         var callsAfterProjection = _acl.CallCount;
 
         await projector.RebuildAsync();