diff --git a/roomserver/storage/tables/membership_table_test.go b/roomserver/storage/tables/membership_table_test.go
index 14e8ce50a..f789ef4ac 100644
--- a/roomserver/storage/tables/membership_table_test.go
+++ b/roomserver/storage/tables/membership_table_test.go
@@ -60,6 +60,9 @@ func TestMembershipTable(t *testing.T) {
 			// This inserts a left user to the room
 			err = tab.InsertMembership(ctx, nil, 1, stateKeyNID, true)
 			assert.NoError(t, err)
+			// We must update the membership with a non-zero event NID or it will get filtered out in later queries
+			_, err = tab.UpdateMembership(ctx, nil, 1, stateKeyNID, userNIDs[0], tables.MembershipStateLeaveOrBan, 1, false)
+			assert.NoError(t, err)
 		}
 
 		// ... so this should be false