--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@ -4,21 +4,7 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).

-## [Unreleased](https://git.d3data.de/D3Public/klicktipp-php-client/compare/1.0.2...rel_1.x)
-
-## [1.0.2](https://git.d3data.de/D3Public/klicktipp-php-client/compare/1.0.1...1.0.2) - 2025-02-05
-### Added
- reset subscription method
-
-### Changed
- endpoint related task with missing endpoint instance throws an exception instead skipping it
-
-### Fixed
- test for index null values in entities
-
-## [1.0.1](https://git.d3data.de/D3Public/klicktipp-php-client/compare/1.0.0...1.0.1) - 2025-01-13
-### Changed
- badges in README
+## [Unreleased](https://git.d3data.de/D3Public/klicktipp-php-client/compare/1.0.0...rel_1.x)

 ## [1.0.0](https://git.d3data.de/D3Public/klicktipp-php-client/releases/tag/1.0.0) - 2025-01-09
 ### Added
--- a/src/Entities/Account.php
+++ b/src/Entities/Account.php
@ -19,14 +19,11 @@ namespace D3\KlicktippPhpClient\Entities;

 use D3\KlicktippPhpClient\Exceptions\CommunicationException;
 use D3\KlicktippPhpClient\Exceptions\InvalidCredentialTypeException;
-use D3\KlicktippPhpClient\Exceptions\MissingEndpointException;
 use D3\KlicktippPhpClient\Resources\Account as AccountEndpoint;
 use Doctrine\Common\Collections\ArrayCollection;

 class Account extends Entity
 {
-    use EndpointTrait;
-
    private ?AccountEndpoint $endpoint;

    public function __construct(array $elements = [], ?AccountEndpoint $endpoint = null)
@ -196,10 +193,9 @@ class Account extends Entity
    /**
     * @return null|bool
     * @throws CommunicationException
-     * @throws MissingEndpointException
     */
    public function persist(): ?bool
    {
-        return $this->getEndpoint()->update();
+        return $this->endpoint?->update();
    }
 }
--- a/src/Entities/EndpointTrait.php
+++ b/src/Entities/EndpointTrait.php
@ -1,36 +0,0 @@
-<?php
-
-/**
- * Copyright (c) D3 Data Development (Inh. Thomas Dartsch)
- *
- * For the full copyright and license information, please view
- * the LICENSE file that was distributed with this source code.
- *
- * https://www.d3data.de
- *
- * @copyright (C) D3 Data Development (Inh. Thomas Dartsch)
- * @author    D3 Data Development - Daniel Seifert <info@shopmodule.com>
- * @link      https://www.oxidmodule.com
- */
-
-declare(strict_types=1);
-
-namespace D3\KlicktippPhpClient\Entities;
-
-use Assert\Assert;
-use D3\KlicktippPhpClient\Exceptions\MissingEndpointException;
-use D3\KlicktippPhpClient\Resources\Model;
-
-trait EndpointTrait
-{
-    private function getEndpoint(): Model
-    {
-        Assert::lazy()
-              ->setExceptionClass(MissingEndpointException::class)
-              ->that($this->endpoint)
-              ->isInstanceOf(Model::class)
-              ->verifyNow();
-
-        return $this->endpoint;
-    }
-}
--- a/src/Entities/Field.php
+++ b/src/Entities/Field.php
@ -18,13 +18,10 @@ declare(strict_types=1);
 namespace D3\KlicktippPhpClient\Entities;

 use D3\KlicktippPhpClient\Exceptions\CommunicationException;
-use D3\KlicktippPhpClient\Exceptions\MissingEndpointException;
 use D3\KlicktippPhpClient\Resources\Field as FieldEndpoint;

 class Field extends Entity
 {
-    use EndpointTrait;
-
    private ?FieldEndpoint $endpoint;

    public function __construct(array $elements = [], ?FieldEndpoint $endpoint = null)
@ -53,15 +50,12 @@ class Field extends Entity
    /**
     * @return null|bool
     * @throws CommunicationException
-     * @throws MissingEndpointException
     */
    public function persist(): ?bool
    {
-        return !is_null($this->getId()) ?
-            $this->getEndpoint()->update(
-                $this->getId(),
-                $this->getName() ?? ''
-            ) :
-            null;
+        return $this->endpoint?->update(
+            $this->getId(),
+            $this->getName()
+        );
    }
 }
--- a/src/Entities/Subscriber.php
+++ b/src/Entities/Subscriber.php
@ -18,15 +18,12 @@ declare(strict_types=1);
 namespace D3\KlicktippPhpClient\Entities;

 use D3\KlicktippPhpClient\Exceptions\CommunicationException;
-use D3\KlicktippPhpClient\Exceptions\MissingEndpointException;
 use D3\KlicktippPhpClient\Resources\Subscriber as SubscriberEndpoint;
 use DateTime;
 use Doctrine\Common\Collections\ArrayCollection;

 class Subscriber extends Entity
 {
-    use EndpointTrait;
-
    public const STATUS_SUBSCRIBED = 'subscribed';
    public const BOUNCE_NOTBOUNCED = 'Not Bounced';

@ -178,7 +175,7 @@ class Subscriber extends Entity
        // use persist method to send to Klicktipp
    }

-    protected function getFieldLongName(string $fieldId): string
+    protected function getFieldLongName(string $fieldId): ?string
    {
        return str_starts_with($fieldId, 'field') ? trim($fieldId) : 'field'.trim($fieldId);
    }
@ -196,15 +193,15 @@ class Subscriber extends Entity
    public function clearTags(): void
    {
        $tags = $this->getTags();
-        $tags?->clear();
-        $this->set(SubscriberEndpoint::TAGS, $tags?->toArray());
+        $tags->clear();
+        $this->set(SubscriberEndpoint::TAGS, $tags->toArray());

        // use persist method to send to Klicktipp
    }

    public function addTag(string $tagId): void
    {
-        $tags = $this->getTags() ?: new ArrayCollection();
+        $tags = $this->getTags();
        $tags->add($tagId);
        $this->set(SubscriberEndpoint::TAGS, $tags->toArray());

@ -214,8 +211,8 @@ class Subscriber extends Entity
    public function removeTag(string $tagId): void
    {
        $tags = $this->getTags();
-        $tags?->removeElement($tagId);
-        $this->set(SubscriberEndpoint::TAGS, $tags?->toArray());
+        $tags->removeElement($tagId);
+        $this->set(SubscriberEndpoint::TAGS, $tags->toArray());

        // use persist method to send to Klicktipp
    }
@ -235,7 +232,7 @@ class Subscriber extends Entity

    public function getManualTagTime(string $tagId): ?DateTime
    {
-        return $this->getDateTimeFromValue($this->getManualTags()?->get($tagId));
+        return $this->getDateTimeFromValue($this->getManualTags()->get($tagId));
    }

    public function getSmartTags(): ?ArrayCollection
@ -317,81 +314,42 @@ class Subscriber extends Entity
    /**
     * @return null|bool
     * @throws CommunicationException
-     * @throws MissingEndpointException
     */
    public function persist(): ?bool
    {
-        if (!is_null($this->getId())) {
-            $return = $this->getEndpoint()->update(
-                $this->getId(),
-                $this->getFields()->toArray(),
-                $this->getEmailAddress() ?? '',
-                $this->getSmsPhone() ?? ''
-            );
+        $return = $this->endpoint?->update(
+            $this->getId(),
+            $this->getFields()->toArray(),
+            $this->getEmailAddress(),
+            $this->getSmsPhone()
+        );

-            $this->persistTags();
+        $this->persistTags();

-            return $return;
-        }
-
-        return null;
+        return $return;
    }

    /**
     * @throws CommunicationException
-     * @throws MissingEndpointException
     */
    protected function persistTags(): void
    {
-        $currentTags = $this->getEndpoint()->getEntity($this->getId() ?? '')->getTags();
+        if (!$this->endpoint instanceof SubscriberEndpoint) {
+            return;
+        }

-        $removeTags = array_diff(
-            $currentTags?->toArray() ?? [],
-            $this->getTags()?->toArray() ?? []
-        );
+        $currentTags = $this->endpoint->getEntity($this->getId())->getTags();

+        $removeTags = array_diff($currentTags->toArray(), $this->getTags()->toArray());
        if (count($removeTags)) {
            foreach ($removeTags as $removeTag) {
-                if (!is_null($this->getEmailAddress())) {
-                    $this->getEndpoint()->untag($this->getEmailAddress(), $removeTag);
-                }
+                $this->endpoint->untag($this->getEmailAddress(), $removeTag);
            }
        }

-        $addTags = array_diff(
-            $this->getTags()?->toArray() ?? [],
-            $currentTags?->toArray() ?? []
-        );
+        $addTags = array_diff($this->getTags()->toArray(), $currentTags->toArray());
        if (count($addTags)) {
-            if (!is_null($this->getEmailAddress())) {
-                $this->getEndpoint()->tag($this->getEmailAddress(), $addTags);
-            }
-        }
-    }
-
-    /**
-     * @param string      $listId
-     * @param string|null $tagId
-     * @param array|null  $fields
-     * @param string|null $smsNumber
-     *
-     * @return void
-     * @throws CommunicationException
-     */
-    public function resubscribe(
-        string $listId,
-        ?string $tagId = null,
-        ?array $fields = null,
-        ?string $smsNumber = null
-    ): void {
-        if (!$this->isSubscribed()) {
-            $this->getEndpoint()->subscribe(
-                $this->getEmailAddress(),
-                $listId,
-                $tagId,
-                $fields,
-                $smsNumber
-            );
+            $this->endpoint->tag($this->getEmailAddress(), $addTags);
        }
    }

--- a/src/Entities/Subscription.php
+++ b/src/Entities/Subscription.php
@ -18,13 +18,10 @@ declare(strict_types=1);
 namespace D3\KlicktippPhpClient\Entities;

 use D3\KlicktippPhpClient\Exceptions\CommunicationException;
-use D3\KlicktippPhpClient\Exceptions\MissingEndpointException;
 use D3\KlicktippPhpClient\Resources\SubscriptionProcess;

 class Subscription extends Entity
 {
-    use EndpointTrait;
-
    private ?SubscriptionProcess $endpoint;

    public function __construct(array $elements = [], ?SubscriptionProcess $endpoint = null)
@ -81,15 +78,12 @@ class Subscription extends Entity
    /**
     * @return null|bool
     * @throws CommunicationException
-     * @throws MissingEndpointException
     */
    public function persist(): ?bool
    {
-        return !is_null($this->getListId()) ?
-            $this->getEndpoint()->update(
-                $this->getListId(),
-                $this->getName() ?? ''
-            ) :
-            null;
+        return $this->endpoint?->update(
+            $this->getListId(),
+            $this->getName()
+        );
    }
 }
--- a/src/Entities/Tag.php
+++ b/src/Entities/Tag.php
@ -18,13 +18,10 @@ declare(strict_types=1);
 namespace D3\KlicktippPhpClient\Entities;

 use D3\KlicktippPhpClient\Exceptions\CommunicationException;
-use D3\KlicktippPhpClient\Exceptions\MissingEndpointException;
 use D3\KlicktippPhpClient\Resources\Tag as TagEndpoint;

 class Tag extends Entity
 {
-    use EndpointTrait;
-
    private ?TagEndpoint $endpoint;

    public function __construct(array $elements = [], ?TagEndpoint $endpoint = null)
@ -65,16 +62,13 @@ class Tag extends Entity
    /**
     * @return null|bool
     * @throws CommunicationException
-     * @throws MissingEndpointException
     */
    public function persist(): ?bool
    {
-        return !is_null($this->getId()) ?
-            $this->getEndpoint()->update(
-                $this->getId(),
-                $this->getName() ?? '',
-                $this->getText() ?? ''
-            ) :
-            null;
+        return $this->endpoint?->update(
+            $this->getId(),
+            $this->getName(),
+            $this->getText()
+        );
    }
 }
--- a/src/Exceptions/MissingEndpointException.php
+++ b/src/Exceptions/MissingEndpointException.php
@ -1,29 +0,0 @@
-<?php
-
-/**
- * Copyright (c) D3 Data Development (Inh. Thomas Dartsch)
- *
- * For the full copyright and license information, please view
- * the LICENSE file that was distributed with this source code.
- *
- * https://www.d3data.de
- *
- * @copyright (C) D3 Data Development (Inh. Thomas Dartsch)
- * @author    D3 Data Development - Daniel Seifert <info@shopmodule.com>
- * @link      https://www.oxidmodule.com
- */
-
-declare(strict_types=1);
-
-namespace D3\KlicktippPhpClient\Exceptions;
-
-use Assert\LazyAssertionException;
-
-class MissingEndpointException extends LazyAssertionException implements KlicktippExceptionInterface
-{
-    public function __construct($message, array $errors)
-    {
-        unset($message);
-        parent::__construct('required endpoint for this action missing', $errors);
-    }
-}
--- a/tests/unit/Entities/AccountTest.php
+++ b/tests/unit/Entities/AccountTest.php
@ -19,7 +19,6 @@ namespace D3\KlicktippPhpClient\tests\unit\Entities;

 use D3\KlicktippPhpClient\Entities\Account;
 use D3\KlicktippPhpClient\Exceptions\InvalidCredentialTypeException;
-use D3\KlicktippPhpClient\Exceptions\MissingEndpointException;
 use D3\KlicktippPhpClient\Resources\Account as AccountEndpoint;
 use D3\KlicktippPhpClient\tests\TestCase;
 use Doctrine\Common\Collections\ArrayCollection;
@ -527,10 +526,6 @@ class AccountTest extends TestCase

        $sut = new Account([AccountEndpoint::UID => 'foo'], $endpointSet ? $endpointMock : null);

-        if (!$endpointSet) {
-            $this->expectException(MissingEndpointException::class);
-        }
-
        $this->assertSame(
            $expectedReturn,
            $this->callMethod(
--- a/tests/unit/Entities/FieldTest.php
+++ b/tests/unit/Entities/FieldTest.php
@ -19,7 +19,6 @@ namespace D3\KlicktippPhpClient\tests\unit\Entities;

 use D3\KlicktippPhpClient\Entities\Field;
 use D3\KlicktippPhpClient\Exceptions\InvalidCredentialTypeException;
-use D3\KlicktippPhpClient\Exceptions\MissingEndpointException;
 use D3\KlicktippPhpClient\Resources\Field as FieldEndpoint;
 use D3\KlicktippPhpClient\tests\TestCase;
 use Generator;
@ -185,10 +184,6 @@ class FieldTest extends TestCase
            $endpointSet ? $endpointMock : null
        );

-        if (!$endpointSet) {
-            $this->expectException(MissingEndpointException::class);
-        }
-
        $this->assertSame(
            $expectedReturn,
            $this->callMethod(
--- a/tests/unit/Entities/SubscriberTest.php
+++ b/tests/unit/Entities/SubscriberTest.php
@ -19,7 +19,6 @@ namespace D3\KlicktippPhpClient\tests\unit\Entities;

 use D3\KlicktippPhpClient\Entities\Subscriber;
 use D3\KlicktippPhpClient\Exceptions\InvalidCredentialTypeException;
-use D3\KlicktippPhpClient\Exceptions\MissingEndpointException;
 use D3\KlicktippPhpClient\Resources\Subscriber as SubscriberEndpoint;
 use D3\KlicktippPhpClient\tests\TestCase;
 use DateTime;
@ -707,11 +706,12 @@ class SubscriberTest extends TestCase
     * @covers \D3\KlicktippPhpClient\Entities\Subscriber::isTagSet
     * @dataProvider isTagSetDataProvider
     */
-    public function testIsTagSet(?array $currentTags, string $searchTagId, bool $expected): void
+    public function testIsTagSet(string $searchTagId, bool $expected): void
    {
-        $tagList = is_null($currentTags) ?
-            null :
-            new ArrayCollection($currentTags);
+        $tagList = new ArrayCollection([
+            "12494453",
+            "12494463",
+        ]);

        $sut = $this->getMockBuilder(Subscriber::class)
            ->onlyMethods(['getTags'])
@ -730,9 +730,8 @@ class SubscriberTest extends TestCase

    public static function isTagSetDataProvider(): Generator
    {
-        yield 'existing tag' => [["12494453", "12494463"], '12494463', true];
-        yield 'missing tag' => [["12494453", "12494463"], '12495463', false];
-        yield 'null tag' => [null, '12495463', false];
+        yield 'existing tag' => ['12494463', true];
+        yield 'missing tag' => ['12495463', false];
    }

    /**
@ -740,27 +739,15 @@ class SubscriberTest extends TestCase
     * @return void
     * @covers \D3\KlicktippPhpClient\Entities\Subscriber::clearTags
     * @throws ReflectionException
-     * @dataProvider clearTagsDataProvider
     */
-    public function testClearTags(?array $currentTagList, ?array $expectedTags): void
+    public function testClearTags(): void
    {
-        $entityMock = new Subscriber([SubscriberEndpoint::TAGS  => $currentTagList]);
-
        $this->callMethod(
-            $entityMock,
+            $this->entity,
            'clearTags'
        );

-        is_null($expectedTags) ?
-            $this->assertNull($this->callMethod($entityMock, 'getTags')) :
-            $this->assertEquals(new ArrayCollection($expectedTags), $this->callMethod($entityMock, 'getTags'));
-    }
-
-    public static function clearTagsDataProvider(): Generator
-    {
-        yield 'tag list exists' => [["12494453","12494463"], []];
-        yield 'tag list empty' => [[], []];
-        yield 'tag list null' => [null, null];
+        $this->assertCount(0, $this->callMethod($this->entity, 'getTags'));
    }

    /**
@ -768,56 +755,36 @@ class SubscriberTest extends TestCase
     * @return void
     * @covers \D3\KlicktippPhpClient\Entities\Subscriber::addTag
     * @throws ReflectionException
-     * @dataProvider addTagDataProvider
     */
-    public function testAddTag(?array $currentTagList, ?array $expectedTagList): void
+    public function testAddTag(): void
    {
-        $entityMock = new Subscriber([SubscriberEndpoint::TAGS  => $currentTagList]);
-
        $this->callMethod(
-            $entityMock,
+            $this->entity,
            'addTag',
            ['78546214']
        );

-        is_null($expectedTagList) ?
-            $this->assertNull($this->callMethod($entityMock, 'getTags')) :
-            $this->assertEquals(new ArrayCollection($expectedTagList), $this->callMethod($entityMock, 'getTags'));
-    }
-
-    public static function addTagDataProvider(): Generator
-    {
-        yield 'tag list exists' => [["12494453","12494463"], ["12494453","12494463", "78546214"]];
-        yield 'tag list empty' => [[], ["78546214"]];
-        yield 'tag list null' => [null, ["78546214"]];
+        $this->assertCount(3, $this->callMethod($this->entity, 'getTags'));
+        $this->assertContains('78546214', $this->callMethod($this->entity, 'getTags'));
    }

    /**
     * @test
+     * @return void
+     * @covers \D3\KlicktippPhpClient\Entities\Subscriber::removeTag
     * @throws ReflectionException
-     * @covers       \D3\KlicktippPhpClient\Entities\Subscriber::removeTag
-     * @dataProvider removeTagDataProvider
     */
-    public function testRemoveTag(?array $currentTagList, ?array $expectedTags): void
+    public function testRemoveTag(): void
    {
-        $entityMock = new Subscriber([SubscriberEndpoint::TAGS  => $currentTagList]);
-
        $this->callMethod(
-            $entityMock,
+            $this->entity,
            'removeTag',
            ['12494453']
        );

-        is_null($expectedTags) ?
-            $this->assertNull($this->callMethod($entityMock, 'getTags')) :
-            $this->assertEquals(new ArrayCollection($expectedTags), $this->callMethod($entityMock, 'getTags'));
-    }
-
-    public static function removeTagDataProvider(): Generator
-    {
-        yield 'tag list exists' => [["12494453","12494463"], [1 => "12494463"]];
-        yield 'tag list empty' => [[], []];
-        yield 'tag list null' => [null, null];
+        $this->assertCount(1, $this->callMethod($this->entity, 'getTags'));
+        $this->assertContains('12494463', $this->callMethod($this->entity, 'getTags'));
+        $this->assertNotContains('12494453', $this->callMethod($this->entity, 'getTags'));
    }

    /**
@ -828,9 +795,7 @@ class SubscriberTest extends TestCase
     */
    public function testPersist(
        bool $endpointSet,
-        ?string $currentId,
        InvokedCount $endpointInvocation,
-        InvokedCount $persistTagsInvocation,
        ?bool $expectedReturn
    ): void {
        $endpointMock = $this->getMockBuilder(SubscriberEndpoint::class)
@ -840,14 +805,10 @@ class SubscriberTest extends TestCase
        $endpointMock->expects($endpointInvocation)->method('update')->willReturn(true);

        $sut = $this->getMockBuilder(Subscriber::class)
-            ->setConstructorArgs([[SubscriberEndpoint::ID => $currentId], $endpointSet ? $endpointMock : null])
+            ->setConstructorArgs([[SubscriberEndpoint::ID => 'foo'], $endpointSet ? $endpointMock : null])
            ->onlyMethods(['persistTags'])
            ->getMock();
-        $sut->expects($persistTagsInvocation)->method('persistTags');
-
-        if (!$endpointSet) {
-            $this->expectException(MissingEndpointException::class);
-        }
+        $sut->expects($this->once())->method('persistTags');

        $this->assertSame(
            $expectedReturn,
@ -860,9 +821,8 @@ class SubscriberTest extends TestCase

    public static function persistDataProvider(): Generator
    {
-        yield 'has endpoint'    => [true, 'fixture', self::once(), self::once(), true];
-        yield 'has no endpoint'    => [false, 'fixture', self::never(), self::never(), null];
-        yield 'has endpoint, no id' => [true, null, self::never(), self::never(), null];
+        yield 'has endpoint'    => [true, self::once(), true];
+        yield 'has no endpoint'    => [false, self::never(), null];
    }

    /**
@ -874,7 +834,6 @@ class SubscriberTest extends TestCase
    public function testPersistTags(
        bool $endpointSet,
        InvokedCount $endpointInvocation,
-        ?array $currentTagList,
        ?array $newTagList,
        InvokedCount $removeTagInvocation,
        InvokedCount $setTagInvocation
@ -883,9 +842,10 @@ class SubscriberTest extends TestCase
            ->disableOriginalConstructor()
            ->onlyMethods(['getTags'])
            ->getMock();
-        $entityMock->method('getTags')->willReturn(
-            is_null($currentTagList) ? null : new ArrayCollection($currentTagList)
-        );
+        $entityMock->method('getTags')->willReturn(new ArrayCollection([
+            "12494453",
+            "12494463",
+        ]));

        $endpointMock = $this->getMockBuilder(SubscriberEndpoint::class)
            ->disableOriginalConstructor()
@ -900,10 +860,6 @@ class SubscriberTest extends TestCase
            $sut->set('tags', $newTagList);
        }

-        if (!$endpointSet) {
-            $this->expectException(MissingEndpointException::class);
-        }
-
        $this->callMethod(
            $sut,
            'persistTags'
@ -912,11 +868,10 @@ class SubscriberTest extends TestCase

    public static function persistTagsDataProvider(): Generator
    {
-        yield 'has endpoint, tag removed' => [true, self::once(), ["12494453", "12494463"], ["12494453"], self::once(), self::never()];
-        yield 'has endpoint, tag added' => [true, self::once(), ["12494453", "12494463"], ["12494453","12494463","12494464"], self::never(), self::once()];
-        yield 'has endpoint, taglist equals' => [true, self::once(), ["12494453", "12494463"], ["12494453","12494463"], self::never(), self::never()];
-        yield 'has no endpoint'    => [false, self::never(), ["12494453", "12494463"], null, self::never(), self::never()];
-        yield 'has endpoint, taglist null'    => [true, self::once(), null, null, self::never(), self::never()];
+        yield 'has endpoint, tag removed' => [true, self::once(), ["12494453"], self::once(), self::never()];
+        yield 'has endpoint, tag added' => [true, self::once(), ["12494453","12494463","12494464"], self::never(), self::once()];
+        yield 'has endpoint, taglist equals' => [true, self::once(), ["12494453","12494463"], self::never(), self::never()];
+        yield 'has no endpoint'    => [false, self::never(), null, self::never(), self::never()];
    }

    /**
@ -987,48 +942,4 @@ class SubscriberTest extends TestCase
        yield ['getStartedCampaignTime', 'getStartedCampaigns'];
        yield ['getFinishedCampaignTime', 'getFinishedCampaigns'];
    }
-
-    /**
-     * @test
-     * @throws ReflectionException
-     * @covers \D3\KlicktippPhpClient\Entities\Subscriber::resubscribe
-     * @covers \D3\KlicktippPhpClient\Entities\Subscriber::getEndpoint
-     * @dataProvider  resubscribeDataProvider
-     */
-    public function testReSubscribe(
-        bool $endpointSet,
-        InvokedCount $subscribeExpections,
-        bool $isSubscribed
-    ): void {
-        $endpointMock = $this->getMockBuilder(SubscriberEndpoint::class)
-            ->disableOriginalConstructor()
-            ->onlyMethods(['subscribe'])
-            ->getMock();
-        $endpointMock->expects($subscribeExpections)->method('subscribe');
-
-        $sut = $this->getMockBuilder(Subscriber::class)
-            ->setConstructorArgs([[], $endpointSet ? $endpointMock : null])
-            ->onlyMethods(['isSubscribed', 'getEmailAddress'])
-            ->getMock();
-        $sut->method('isSubscribed')->willReturn($isSubscribed);
-        $sut->method('getEmailAddress')->willReturn('mail@mydomain.tld');
-
-        if (!$endpointSet && !$isSubscribed) {
-            $this->expectException(MissingEndpointException::class);
-        }
-
-        $this->callMethod(
-            $sut,
-            'resubscribe',
-            ['listId', 'tagid']
-        );
-    }
-
-    public static function resubscribeDataProvider(): Generator
-    {
-        yield 'already subscribed, has endpoint' => [true, self::never(), true];
-        yield 'unsubscribed, has endpoint' => [true, self::once(), false];
-        yield 'already subscribed, no endpoint' => [false, self::never(), true];
-        yield 'unsubscribed, no endpoint' => [false, self::never(), false];
-    }
 }
--- a/tests/unit/Entities/SubscriptionTest.php
+++ b/tests/unit/Entities/SubscriptionTest.php
@ -19,7 +19,6 @@ namespace D3\KlicktippPhpClient\tests\unit\Entities;

 use D3\KlicktippPhpClient\Entities\Subscription;
 use D3\KlicktippPhpClient\Exceptions\InvalidCredentialTypeException;
-use D3\KlicktippPhpClient\Exceptions\MissingEndpointException;
 use D3\KlicktippPhpClient\Resources\SubscriptionProcess as SubscriptionEndpoint;
 use D3\KlicktippPhpClient\tests\TestCase;
 use Generator;
@ -206,7 +205,6 @@ class SubscriptionTest extends TestCase
     */
    public function testPersist(
        bool $endpointSet,
-        ?string $id,
        InvokedCount $endpointInvocation,
        ?bool $expectedReturn
    ): void {
@ -215,19 +213,15 @@ class SubscriptionTest extends TestCase
            ->onlyMethods(['update'])
            ->getMock();
        $endpointMock->expects($endpointInvocation)->method('update')->with(
-            $this->identicalTo($id),
+            $this->identicalTo('foo'),
            $this->identicalTo('bar'),
        )->willReturn(true);

        $sut = new Subscription(
-            [SubscriptionEndpoint::LISTID => $id, SubscriptionEndpoint::NAME  => 'bar'],
+            [SubscriptionEndpoint::LISTID => 'foo', SubscriptionEndpoint::NAME  => 'bar'],
            $endpointSet ? $endpointMock : null
        );

-        if (!$endpointSet) {
-            $this->expectException(MissingEndpointException::class);
-        }
-
        $this->assertSame(
            $expectedReturn,
            $this->callMethod(
@ -239,8 +233,7 @@ class SubscriptionTest extends TestCase

    public static function persistDataProvider(): Generator
    {
-        yield 'has endpoint'        => [true, 'fixture', self::once(), true];
-        yield 'has no endpoint'     => [false, 'fixture', self::never(), null];
-        yield 'has endpoint, no id' => [true, null, self::never(), null];
+        yield 'has endpoint'    => [true, self::once(), true];
+        yield 'has no endpoint'    => [false, self::never(), null];
    }
 }
--- a/tests/unit/Entities/TagTest.php
+++ b/tests/unit/Entities/TagTest.php
@ -19,7 +19,6 @@ namespace D3\KlicktippPhpClient\tests\unit\Entities;

 use D3\KlicktippPhpClient\Entities\Tag;
 use D3\KlicktippPhpClient\Exceptions\InvalidCredentialTypeException;
-use D3\KlicktippPhpClient\Exceptions\MissingEndpointException;
 use D3\KlicktippPhpClient\Resources\Tag as TagEndpoint;
 use D3\KlicktippPhpClient\tests\TestCase;
 use Generator;
@ -199,10 +198,6 @@ class TagTest extends TestCase
            $endpointSet ? $endpointMock : null
        );

-        if (!$endpointSet) {
-            $this->expectException(MissingEndpointException::class);
-        }
-
        $this->assertSame(
            $expectedReturn,
            $this->callMethod(
--- a/tests/unit/Exceptions/MissingEndpointExceptionTest.php
+++ b/tests/unit/Exceptions/MissingEndpointExceptionTest.php
@ -1,54 +0,0 @@
-<?php
-
-/**
- * Copyright (c) D3 Data Development (Inh. Thomas Dartsch)
- *
- * For the full copyright and license information, please view
- * the LICENSE file that was distributed with this source code.
- *
- * https://www.d3data.de
- *
- * @copyright (C) D3 Data Development (Inh. Thomas Dartsch)
- * @author    D3 Data Development - Daniel Seifert <info@shopmodule.com>
- * @link      https://www.oxidmodule.com
- */
-
-declare(strict_types=1);
-
-namespace D3\KlicktippPhpClient\tests\unit\Exceptions;
-
-use D3\KlicktippPhpClient\Exceptions\CommunicationException;
-use D3\KlicktippPhpClient\Exceptions\MissingEndpointException;
-use D3\KlicktippPhpClient\tests\TestCase;
-use ReflectionException;
-
-/**
- * @covers \D3\KlicktippPhpClient\Exceptions\MissingEndpointException
- */
-class MissingEndpointExceptionTest extends TestCase
-{
-    /**
-     * @test
-     * @return void
-     * @throws ReflectionException
-     * @covers \D3\KlicktippPhpClient\Exceptions\MissingEndpointException::__construct
-     */
-    public function testConstructor(): void
-    {
-        /** @var MissingEndpointException $sutMock */
-        $sutMock = $this->getMockBuilder(MissingEndpointException::class)
-            ->disableOriginalConstructor()
-            ->getMock();
-
-        $this->callMethod(
-            $sutMock,
-            '__construct',
-            ['myMessage', []]
-        );
-
-        $this->assertMatchesRegularExpression(
-            '/.*?endpoint.*?missing.*/i',
-            $sutMock->getMessage()
-        );
-    }
-}