diff --git a/.github/workflows/quality-assurance.yml b/.github/workflows/quality-assurance.yml
index bd42bab..851b217 100644
--- a/.github/workflows/quality-assurance.yml
+++ b/.github/workflows/quality-assurance.yml
@@ -13,10 +13,8 @@ jobs:
         laravel: [^10.0, ^11.0]
         include:
           - laravel: ^11.0
-            phpunit: ^10.0
             testbench: ^9.0
           - laravel: ^10.0
-            phpunit: ^9.5
             testbench: ^8.0
     name: P${{ matrix.php }} - L${{ matrix.laravel }}
     steps:
@@ -32,7 +30,7 @@ jobs:
 
       - name: Install dependencies
         run: |
-          composer require "laravel/framework:${{ matrix.laravel }}" "phpunit/phpunit:${{ matrix.phpunit }}" "orchestra/testbench:${{ matrix.testbench }}" --no-interaction --no-update
+          composer require "laravel/framework:${{ matrix.laravel }}" "orchestra/testbench:${{ matrix.testbench }}" --no-interaction --no-update
           composer update --prefer-dist --no-interaction
 
       - name: Run tests
diff --git a/composer.json b/composer.json
index e4c8fab..721e19b 100644
--- a/composer.json
+++ b/composer.json
@@ -22,7 +22,7 @@
         "laravel/legacy-factories": "^1.1",
         "orchestra/testbench": "^8.0",
         "phpstan/phpstan": "^1.8",
-        "phpunit/phpunit": "^9.5|^10.0",
+        "phpunit/phpunit": "^10.0",
         "rector/rector": "^1.0"
     },
     "autoload": {
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 67830fb..539ce2e 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -1,26 +1,29 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" colors="true" bootstrap="vendor/autoload.php" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd">
-    <coverage>
-        <include>
-            <directory>./src/</directory>
-        </include>
-        <exclude>
-            <directory suffix="Test.php">src/</directory>
-            <directory suffix="TestCase.php">src/</directory>
-            <directory>src/Testing/</directory>
-        </exclude>
-    </coverage>
-    <testsuites>
-        <testsuite name="Laravel Mollie Webhooks">
-            <directory suffix="Test.php">src/</directory>
-        </testsuite>
-    </testsuites>
-    <php>
-        <server name="APP_ENV" value="testing"/>
-        <server name="BCRYPT_ROUNDS" value="4"/>
-        <server name="CACHE_DRIVER" value="array"/>
-        <server name="DB_CONNECTION" value="sqlite"/>
-        <server name="DB_DATABASE" value=":memory:"/>
-        <server name="QUEUE_CONNECTION" value="sync"/>
-    </php>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         colors="true"
+         bootstrap="vendor/autoload.php"
+         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/10.5/phpunit.xsd">
+  <testsuites>
+    <testsuite name="Laravel Mollie Webhooks">
+      <directory suffix="Test.php">src/</directory>
+    </testsuite>
+  </testsuites>
+  <php>
+    <server name="APP_ENV" value="testing"/>
+    <server name="BCRYPT_ROUNDS" value="4"/>
+    <server name="CACHE_DRIVER" value="array"/>
+    <server name="DB_CONNECTION" value="sqlite"/>
+    <server name="DB_DATABASE" value=":memory:"/>
+    <server name="QUEUE_CONNECTION" value="sync"/>
+  </php>
+  <source>
+    <include>
+      <directory>./src/</directory>
+    </include>
+    <exclude>
+      <directory suffix="Test.php">src/</directory>
+      <directory suffix="TestCase.php">src/</directory>
+      <directory>src/Testing/</directory>
+    </exclude>
+  </source>
 </phpunit>
diff --git a/src/Commands/ProcessMollieWebhookTest.php b/src/Commands/ProcessMollieWebhookTest.php
index ee09c2c..ec433ac 100644
--- a/src/Commands/ProcessMollieWebhookTest.php
+++ b/src/Commands/ProcessMollieWebhookTest.php
@@ -9,7 +9,7 @@
 use Craftzing\Laravel\MollieWebhooks\Events\MollieResourceStatusWasUpdated;
 use Craftzing\Laravel\MollieWebhooks\Exceptions\UnexpectedWebhookPayload;
 use Craftzing\Laravel\MollieWebhooks\Testing\IntegrationTestCase;
-use Craftzing\Laravel\MollieWebhooks\Testing\TruthTest;
+use Craftzing\Laravel\MollieWebhooks\Testing\HandleAssertions;
 use Exception;
 use Generator;
 use Illuminate\Contracts\Queue\ShouldQueue;
@@ -30,7 +30,7 @@ public function itShouldBeQueued(): void
         $this->assertInstanceOf(ShouldQueue::class, new ProcessMollieWebhook($webhookCall));
     }
 
-    public function invalidWebhookPayloads(): Generator
+    public static function invalidWebhookPayloads(): Generator
     {
         yield 'Missing a Mollie object identifier' => [
             [],
@@ -56,15 +56,15 @@ public function itFailsWhenTheWebhookPayloadIsInvalid(array $payload, Exception
         $this->handle(new ProcessMollieWebhook($webhookCall));
     }
 
-    public function webhookPayloads(): Generator
+    public static function webhookPayloads(): Generator
     {
         yield 'order resource id' => [
-            fn () => $this->generateOrderId(),
+            fn (self $test) => $test->generateOrderId(),
             MollieOrderWasUpdated::class,
         ];
 
         yield 'payment resource id' => [
-            fn () => $this->generatePaymentId(),
+            fn (self $test) => $test->generatePaymentId(),
             MolliePaymentWasUpdated::class,
         ];
     }
@@ -75,7 +75,7 @@ public function webhookPayloads(): Generator
      */
     public function itCanHandleIncomingWebhooks(callable $generatesResourceId, string $event): void
     {
-        $resourceId = $generatesResourceId();
+        $resourceId = $generatesResourceId($this);
         $webhookCall = new WebhookCall([
             'payload' => [
                 'id' => $resourceId->value(),
@@ -86,7 +86,7 @@ public function itCanHandleIncomingWebhooks(callable $generatesResourceId, strin
 
         Event::assertDispatched(
             $event,
-            new TruthTest(function (MollieResourceStatusWasUpdated $event) use ($resourceId, $webhookCall): void {
+            new HandleAssertions(function (MollieResourceStatusWasUpdated $event) use ($resourceId, $webhookCall): void {
                 $this->assertSame($event->resourceId()->value(), $resourceId->value());
                 $this->assertTrue($event->webhookCall()->is($webhookCall));
             }),
diff --git a/src/Http/Requests/HandleMollieWebhooksRequestTest.php b/src/Http/Requests/HandleMollieWebhooksRequestTest.php
index cd2ccd3..a64bd23 100644
--- a/src/Http/Requests/HandleMollieWebhooksRequestTest.php
+++ b/src/Http/Requests/HandleMollieWebhooksRequestTest.php
@@ -33,7 +33,7 @@ public function registerWebhooksHandlerRoute(): void
         });
     }
 
-    public function invalidPayloads(): Generator
+    public static function invalidPayloads(): Generator
     {
         yield 'Empty payload' => [
             [],
@@ -68,7 +68,7 @@ public function itCanHandleIncomingMollieWebhooksWithAnInvalidPayload(array $pay
         Bus::assertDispatched(ProcessMollieWebhook::class);
     }
 
-    public function validPayloads(): Generator
+    public static function validPayloads(): Generator
     {
         yield 'Payload with a Mollie payment identifier' => [
             ['id' => PaymentId::PREFIX . Str::random(8)],
diff --git a/src/Orders/OrderIdTest.php b/src/Orders/OrderIdTest.php
index 953e759..ade837d 100644
--- a/src/Orders/OrderIdTest.php
+++ b/src/Orders/OrderIdTest.php
@@ -9,17 +9,17 @@
 
 final class OrderIdTest extends PrefixedResourceIdTestCase
 {
-    protected function resourceIdClass(): string
+    protected static function resourceIdClass(): string
     {
         return OrderId::class;
     }
 
-    protected function expectedPrefix(): string
+    protected static function expectedPrefix(): string
     {
         return 'ord_';
     }
 
-    protected function expectedExceptionClass(): string
+    protected static function expectedExceptionClass(): string
     {
         return InvalidResourceId::class;
     }
diff --git a/src/Orders/WebhookCallOrderHistoryTest.php b/src/Orders/WebhookCallOrderHistoryTest.php
index 92ced68..8e8150a 100644
--- a/src/Orders/WebhookCallOrderHistoryTest.php
+++ b/src/Orders/WebhookCallOrderHistoryTest.php
@@ -14,10 +14,10 @@ final class WebhookCallOrderHistoryTest extends IntegrationTestCase
 {
     use ProvidesResourceWebhookCallHistory;
 
-    public function orderWebhookCallHistory(): Generator
+    public static function orderWebhookCallHistory(): Generator
     {
         foreach (FakeOrder::STATUSES as $orderStatus) {
-            yield from $this->resourceWebhookCallHistory($orderStatus, $this->randomOrderStatusExcept(...));
+            yield from self::resourceWebhookCallHistory($orderStatus, self::randomOrderStatusExcept(...));
         }
     }
 
diff --git a/src/Payments/PaymentIdTest.php b/src/Payments/PaymentIdTest.php
index c314c03..31a3d41 100644
--- a/src/Payments/PaymentIdTest.php
+++ b/src/Payments/PaymentIdTest.php
@@ -9,17 +9,17 @@
 
 final class PaymentIdTest extends PrefixedResourceIdTestCase
 {
-    protected function resourceIdClass(): string
+    protected static function resourceIdClass(): string
     {
         return PaymentId::class;
     }
 
-    protected function expectedPrefix(): string
+    protected static function expectedPrefix(): string
     {
         return 'tr_';
     }
 
-    protected function expectedExceptionClass(): string
+    protected static function expectedExceptionClass(): string
     {
         return InvalidResourceId::class;
     }
diff --git a/src/Payments/WebhookCallPaymentHistoryTest.php b/src/Payments/WebhookCallPaymentHistoryTest.php
index a74fa44..d3e53cb 100644
--- a/src/Payments/WebhookCallPaymentHistoryTest.php
+++ b/src/Payments/WebhookCallPaymentHistoryTest.php
@@ -14,10 +14,10 @@ final class WebhookCallPaymentHistoryTest extends IntegrationTestCase
 {
     use ProvidesResourceWebhookCallHistory;
 
-    public function paymentWebhookCallHistory(): Generator
+    public static function paymentWebhookCallHistory(): Generator
     {
         foreach (FakePayment::STATUSES as $paymentStatus) {
-            yield from $this->resourceWebhookCallHistory($paymentStatus, $this->randomPaymentStatusExcept(...));
+            yield from self::resourceWebhookCallHistory($paymentStatus, self::randomPaymentStatusExcept(...));
         }
     }
 
diff --git a/src/Queries/LatestMollieWebhookCallByResourceIdTest.php b/src/Queries/LatestMollieWebhookCallByResourceIdTest.php
index 7883c7e..cf68d62 100644
--- a/src/Queries/LatestMollieWebhookCallByResourceIdTest.php
+++ b/src/Queries/LatestMollieWebhookCallByResourceIdTest.php
@@ -16,7 +16,7 @@ final class LatestMollieWebhookCallByResourceIdTest extends IntegrationTestCase
 {
     use WithFaker;
 
-    public function noResults(): Generator
+    public static function noResults(): Generator
     {
         yield 'Webhook call history is empty' => [
             fn () => null,
@@ -27,9 +27,9 @@ public function noResults(): Generator
         ];
 
         yield 'Webhook call history has no recent calls from Mollie for payload fragment' => [
-            fn (ResourceId $resourceId) => FakeMollieWebhookCall::new()
+            fn (ResourceId $resourceId, self $test) => FakeMollieWebhookCall::new()
                 ->forResourceId($resourceId)
-                ->create(['name' => $this->makeFaker()->name]),
+                ->create(['name' => $test->makeFaker()->name]),
         ];
     }
 
@@ -40,7 +40,7 @@ public function noResults(): Generator
     public function itCanHandleNoResults(callable $addWebhookCallHistory): void
     {
         $resourceId = $this->generatePaymentId();
-        $addWebhookCallHistory($resourceId);
+        $addWebhookCallHistory($resourceId, $this);
         $ignoreWebhookCall = FakeMollieWebhookCall::new()
             ->forResourceId($resourceId)
             ->create();
@@ -97,7 +97,7 @@ public function itIgnoresFailedWebhookCalls(): void
         $this->assertTrue($result->is($latestWebhookCall));
     }
 
-    public function webhookCallByFragment(): Generator
+    public static function webhookCallByFragment(): Generator
     {
         yield 'Webhook call history with multiple scenarios' => [
             function (ResourceId $resourceId): WebhookCall {
diff --git a/src/Refunds/RefundIdTest.php b/src/Refunds/RefundIdTest.php
index 05ef729..105745a 100644
--- a/src/Refunds/RefundIdTest.php
+++ b/src/Refunds/RefundIdTest.php
@@ -9,17 +9,17 @@
 
 final class RefundIdTest extends PrefixedResourceIdTestCase
 {
-    protected function resourceIdClass(): string
+    protected static function resourceIdClass(): string
     {
         return RefundId::class;
     }
 
-    protected function expectedPrefix(): string
+    protected static function expectedPrefix(): string
     {
         return 're_';
     }
 
-    protected function expectedExceptionClass(): string
+    protected static function expectedExceptionClass(): string
     {
         return InvalidResourceId::class;
     }
diff --git a/src/Subscribers/SubscribeToMollieOrderRefundsTest.php b/src/Subscribers/SubscribeToMollieOrderRefundsTest.php
index 709bd80..d1e6479 100644
--- a/src/Subscribers/SubscribeToMollieOrderRefundsTest.php
+++ b/src/Subscribers/SubscribeToMollieOrderRefundsTest.php
@@ -49,7 +49,7 @@ public function itCanBeRegisteredAsAQueuedSubscriberForTheGenericOrderEvent(): v
         });
     }
 
-    public function orderHistory(): Generator
+    public static function orderHistory(): Generator
     {
         yield 'Order has no refunds' => [
             fn (): array => [],
diff --git a/src/Subscribers/SubscribeToMollieOrderStatusChangesTest.php b/src/Subscribers/SubscribeToMollieOrderStatusChangesTest.php
index eec3748..06d1636 100644
--- a/src/Subscribers/SubscribeToMollieOrderStatusChangesTest.php
+++ b/src/Subscribers/SubscribeToMollieOrderStatusChangesTest.php
@@ -16,7 +16,7 @@
 use Craftzing\Laravel\MollieWebhooks\Testing\Doubles\FakeOrder;
 use Craftzing\Laravel\MollieWebhooks\Testing\Doubles\Orders\FakeOrderHistory;
 use Craftzing\Laravel\MollieWebhooks\Testing\IntegrationTestCase;
-use Craftzing\Laravel\MollieWebhooks\Testing\TruthTest;
+use Craftzing\Laravel\MollieWebhooks\Testing\HandleAssertions;
 use Generator;
 use Illuminate\Events\CallQueuedListener;
 use Illuminate\Support\Facades\Event;
@@ -53,7 +53,7 @@ public function itCanBeRegisteredAsAQueuedSubscriberForTheGenericOrderEvent(): v
         });
     }
 
-    public function orderHistory(): Generator
+    public static function orderHistory(): Generator
     {
         yield 'Order history does not have status for the order yet' => [
             fn () => null,
@@ -90,7 +90,7 @@ public function itCanHandleWebhookCallsIndicatingAnOrderStatusChangedToPaid(call
         } else {
             Event::assertDispatched(
                 MollieOrderStatusChangedToPaid::class,
-                new TruthTest(function (MollieOrderStatusChangedToPaid $event) use ($orderId): void {
+                new HandleAssertions(function (MollieOrderStatusChangedToPaid $event) use ($orderId): void {
                     $this->assertSame($orderId, $event->orderId);
                 }),
             );
@@ -117,7 +117,7 @@ public function itCanHandleWebhookCallsIndicatingAnOrderStatusChangedToExpired(c
         } else {
             Event::assertDispatched(
                 MollieOrderStatusChangedToExpired::class,
-                new TruthTest(function (MollieOrderStatusChangedToExpired $event) use ($orderId): void {
+                new HandleAssertions(function (MollieOrderStatusChangedToExpired $event) use ($orderId): void {
                     $this->assertSame($orderId, $event->orderId);
                 }),
             );
@@ -144,7 +144,7 @@ public function itCanHandleWebhookCallsIndicatingAnOrderStatusChangedToAuthorize
         } else {
             Event::assertDispatched(
                 MollieOrderStatusChangedToAuthorized::class,
-                new TruthTest(function (MollieOrderStatusChangedToAuthorized $event) use ($orderId): void {
+                new HandleAssertions(function (MollieOrderStatusChangedToAuthorized $event) use ($orderId): void {
                     $this->assertSame($orderId, $event->orderId);
                 }),
             );
@@ -171,7 +171,7 @@ public function itCanHandleWebhookCallsIndicatingAnOrderStatusChangedToCanceled(
         } else {
             Event::assertDispatched(
                 MollieOrderStatusChangedToCanceled::class,
-                new TruthTest(function (MollieOrderStatusChangedToCanceled $event) use ($orderId): void {
+                new HandleAssertions(function (MollieOrderStatusChangedToCanceled $event) use ($orderId): void {
                     $this->assertSame($orderId, $event->orderId);
                 }),
             );
@@ -198,7 +198,7 @@ public function itCanHandleWebhookCallsIndicatingAnOrderStatusChangedToCompleted
         } else {
             Event::assertDispatched(
                 MollieOrderStatusChangedToCompleted::class,
-                new TruthTest(function (MollieOrderStatusChangedToCompleted $event) use ($orderId): void {
+                new HandleAssertions(function (MollieOrderStatusChangedToCompleted $event) use ($orderId): void {
                     $this->assertSame($orderId, $event->orderId);
                 }),
             );
@@ -214,7 +214,7 @@ private function webhookCallIndicatingOrderStatusChangedTo(string $status): Webh
             ->create();
     }
 
-    public function statusesThatDontFireEvents(): Generator
+    public static function statusesThatDontFireEvents(): Generator
     {
         yield 'Call with status: `' . OrderStatus::STATUS_CREATED . '`' => [
             OrderStatus::STATUS_CREATED,
diff --git a/src/Subscribers/SubscribeToMolliePaymentRefundsTest.php b/src/Subscribers/SubscribeToMolliePaymentRefundsTest.php
index e178a14..6dcbf3b 100644
--- a/src/Subscribers/SubscribeToMolliePaymentRefundsTest.php
+++ b/src/Subscribers/SubscribeToMolliePaymentRefundsTest.php
@@ -49,7 +49,7 @@ public function itCanBeRegisteredAsAQueuedSubscriberForTheGenericPaymentEvent():
         });
     }
 
-    public function paymentHistory(): Generator
+    public static function paymentHistory(): Generator
     {
         yield 'Payment has no refunds' => [
             fn (): array => [],
diff --git a/src/Subscribers/SubscribeToMolliePaymentStatusChangesTest.php b/src/Subscribers/SubscribeToMolliePaymentStatusChangesTest.php
index a773c06..3b5275d 100644
--- a/src/Subscribers/SubscribeToMolliePaymentStatusChangesTest.php
+++ b/src/Subscribers/SubscribeToMolliePaymentStatusChangesTest.php
@@ -15,7 +15,7 @@
 use Craftzing\Laravel\MollieWebhooks\Testing\Doubles\FakePayment;
 use Craftzing\Laravel\MollieWebhooks\Testing\Doubles\Payments\FakePaymentHistory;
 use Craftzing\Laravel\MollieWebhooks\Testing\IntegrationTestCase;
-use Craftzing\Laravel\MollieWebhooks\Testing\TruthTest;
+use Craftzing\Laravel\MollieWebhooks\Testing\HandleAssertions;
 use Generator;
 use Illuminate\Events\CallQueuedListener;
 use Illuminate\Support\Facades\Event;
@@ -52,7 +52,7 @@ public function itCanBeRegisteredAsAQueuedSubscriberForTheGenericPaymentEvent():
         });
     }
 
-    public function paymentHistory(): Generator
+    public static function paymentHistory(): Generator
     {
         yield 'Payment history does not have status for the payment yet' => [
             fn () => null,
@@ -89,7 +89,7 @@ public function itCanHandleWebhookCallsIndicatingAPaymentStatusChangedToPaid(cal
         } else {
             Event::assertDispatched(
                 MolliePaymentStatusChangedToPaid::class,
-                new TruthTest(function (MolliePaymentStatusChangedToPaid $event) use ($paymentId): void {
+                new HandleAssertions(function (MolliePaymentStatusChangedToPaid $event) use ($paymentId): void {
                     $this->assertSame($paymentId, $event->paymentId);
                 }),
             );
@@ -116,7 +116,7 @@ public function itCanHandleWebhookCallsIndicatingAPaymentStatusChangedToExpired(
         } else {
             Event::assertDispatched(
                 MolliePaymentStatusChangedToExpired::class,
-                new TruthTest(function (MolliePaymentStatusChangedToExpired $event) use ($paymentId): void {
+                new HandleAssertions(function (MolliePaymentStatusChangedToExpired $event) use ($paymentId): void {
                     $this->assertSame($paymentId, $event->paymentId);
                 }),
             );
@@ -143,7 +143,7 @@ public function itCanHandleWebhookCallsIndicatingAPaymentStatusChangedToFailed(c
         } else {
             Event::assertDispatched(
                 MolliePaymentStatusChangedToFailed::class,
-                new TruthTest(function (MolliePaymentStatusChangedToFailed $event) use ($paymentId): void {
+                new HandleAssertions(function (MolliePaymentStatusChangedToFailed $event) use ($paymentId): void {
                     $this->assertSame($paymentId, $event->paymentId);
                 }),
             );
@@ -170,7 +170,7 @@ public function itCanHandleWebhookCallsIndicatingAPaymentStatusChangedToCanceled
         } else {
             Event::assertDispatched(
                 MolliePaymentStatusChangedToCanceled::class,
-                new TruthTest(function (MolliePaymentStatusChangedToCanceled $event) use ($paymentId): void {
+                new HandleAssertions(function (MolliePaymentStatusChangedToCanceled $event) use ($paymentId): void {
                     $this->assertSame($paymentId, $event->paymentId);
                 }),
             );
@@ -186,7 +186,7 @@ private function webhookCallIndicatingPaymentStatusChangedTo(string $status): We
             ->create();
     }
 
-    public function statusesThatDontFireEvents(): Generator
+    public static function statusesThatDontFireEvents(): Generator
     {
         yield 'Call with status `' . PaymentStatus::STATUS_AUTHORIZED . '`' => [
             PaymentStatus::STATUS_AUTHORIZED,
diff --git a/src/Testing/Concerns/FakesMollie.php b/src/Testing/Concerns/FakesMollie.php
index e2d5c05..0fa65d7 100644
--- a/src/Testing/Concerns/FakesMollie.php
+++ b/src/Testing/Concerns/FakesMollie.php
@@ -61,7 +61,7 @@ protected function generateRefundId(): RefundId
         return RefundId::fromString(RefundId::PREFIX . Str::random(random_int(4, 16)));
     }
 
-    protected function randomOrderStatusExcept(string $excludeStatus = ''): string
+    protected static function randomOrderStatusExcept(string $excludeStatus = ''): string
     {
         $statuses = array_filter(
             FakeOrder::STATUSES,
@@ -71,7 +71,7 @@ protected function randomOrderStatusExcept(string $excludeStatus = ''): string
         return Arr::random($statuses);
     }
 
-    protected function randomPaymentStatusExcept(string $excludeStatus = ''): string
+    protected static function randomPaymentStatusExcept(string $excludeStatus = ''): string
     {
         $statuses = array_filter(
             FakePayment::STATUSES,
@@ -81,7 +81,7 @@ protected function randomPaymentStatusExcept(string $excludeStatus = ''): string
         return Arr::random($statuses);
     }
 
-    protected function randomRefundStatusExcept(string $excludeStatus = ''): string
+    protected static function randomRefundStatusExcept(string $excludeStatus = ''): string
     {
         $statuses = array_filter(
             FakeRefund::STATUSES,
diff --git a/src/Testing/Concerns/ProvidesResourceWebhookCallHistory.php b/src/Testing/Concerns/ProvidesResourceWebhookCallHistory.php
index ac11d2b..574b361 100644
--- a/src/Testing/Concerns/ProvidesResourceWebhookCallHistory.php
+++ b/src/Testing/Concerns/ProvidesResourceWebhookCallHistory.php
@@ -16,7 +16,7 @@
 
 trait ProvidesResourceWebhookCallHistory
 {
-    public function resourceWebhookCallHistory(string $resourceStatus, callable $resolveDifferentStatus): Generator
+    public static function resourceWebhookCallHistory(string $resourceStatus, callable $resolveDifferentStatus): Generator
     {
         yield "$resourceStatus - No webhook calls were made for the resource so far" => [
             fn (): string => $resourceStatus,
@@ -96,7 +96,7 @@ function (ResourceId $resourceId) use ($resourceStatus): string {
         ];
     }
 
-    public function refundsWebhookCallHistory(string $refundStatus): Generator
+    public static function refundsWebhookCallHistory(): Generator
     {
         foreach (FakeRefund::STATUSES as $refundStatus) {
             yield "$refundStatus - No webhook calls were made for the resource" => [
@@ -131,7 +131,7 @@ function (ResourceId $resourceId, RefundId $refundId) use ($refundStatus): strin
                 function (ResourceId $resourceId, RefundId $refundId) use ($refundStatus): string {
                     $latestWebhookCall = FakeMollieWebhookCall::new()
                         ->forResourceId($resourceId)
-                        ->withRefundInPayload($refundId, $this->randomRefundStatusExcept($refundStatus))
+                        ->withRefundInPayload($refundId, self::randomRefundStatusExcept($refundStatus))
                         ->create();
 
                     return $refundStatus;
diff --git a/src/Testing/Doubles/FakeOrder.php b/src/Testing/Doubles/FakeOrder.php
index f38ac3c..3915fd6 100644
--- a/src/Testing/Doubles/FakeOrder.php
+++ b/src/Testing/Doubles/FakeOrder.php
@@ -53,7 +53,7 @@ public function id(): OrderId
 
     public function withStatus(string $status = ''): self
     {
-        $this->status = $status ?: $this->randomOrderStatusExcept();
+        $this->status = $status ?: $this::randomOrderStatusExcept();
 
         return $this;
     }
diff --git a/src/Testing/TruthTest.php b/src/Testing/HandleAssertions.php
similarity index 81%
rename from src/Testing/TruthTest.php
rename to src/Testing/HandleAssertions.php
index 197f3b5..cd3f33a 100644
--- a/src/Testing/TruthTest.php
+++ b/src/Testing/HandleAssertions.php
@@ -6,7 +6,7 @@
 
 use function call_user_func_array;
 
-final class TruthTest
+final class HandleAssertions
 {
     /**
      * @var callable
@@ -18,7 +18,7 @@ public function __construct(callable $assertion)
         $this->assertion = $assertion;
     }
 
-    public function __invoke(...$arguments): bool
+    public function __invoke(mixed ...$arguments): bool
     {
         call_user_func_array($this->assertion, $arguments);
 
diff --git a/src/Testing/PrefixedResourceIdTestCase.php b/src/Testing/PrefixedResourceIdTestCase.php
index 482197a..3583172 100644
--- a/src/Testing/PrefixedResourceIdTestCase.php
+++ b/src/Testing/PrefixedResourceIdTestCase.php
@@ -17,13 +17,13 @@ abstract class PrefixedResourceIdTestCase extends TestCase
 {
     private const EXPECTED_PREFIX = 're_';
 
-    abstract protected function resourceIdClass(): string;
+    abstract protected static function resourceIdClass(): string;
 
-    abstract protected function expectedPrefix(): string;
+    abstract protected static function expectedPrefix(): string;
 
-    abstract protected function expectedExceptionClass(): string;
+    abstract protected static function expectedExceptionClass(): string;
 
-    public function invalidMollieResourceIds(): Generator
+    public static function invalidMollieResourceIds(): Generator
     {
         yield 'Value has no prefix' => [Str::random(8)];
         yield 'Value has an invalid prefix' => ['pa_' . Str::random(8)];
@@ -36,25 +36,27 @@ public function invalidMollieResourceIds(): Generator
     public function itCannotBeConstructedFromAnInvalidMollieResourceIdString(string $value): void
     {
         $this->expectExceptionObject(
-            call_user_func([$this->expectedExceptionClass(), 'missingExpectedPrefix'], $value, $this->expectedPrefix())
+            call_user_func([$this::expectedExceptionClass(), 'missingExpectedPrefix'], $value, $this::expectedPrefix())
         );
 
-        $this->resourceIdClass()::fromString($value);
+        $this::resourceIdClass()::fromString($value);
     }
 
-    public function validMollieResourceIds(): Generator
+    public static function validMollieResourceIds(): Generator
     {
-        yield 'Short identifier' => [$this->expectedPrefix() . Str::random(4)];
-        yield 'Long identifier' => [$this->expectedPrefix() . Str::random(8)];
+        yield 'Short identifier' => [fn (self $test): string => $test::expectedPrefix() . Str::random(4)];
+        yield 'Long identifier' => [fn (self $test): string => $test::expectedPrefix() . Str::random(8)];
     }
 
     /**
      * @test
      * @dataProvider validMollieResourceIds
      */
-    public function itCanBeConstructedFromAValidMollieResourceIdString(string $value): void
+    public function itCanBeConstructedFromAValidMollieResourceIdString(callable $resolveValue): void
     {
-        $resourceId = $this->resourceIdClass()::fromString($value);
+        $value = $resolveValue($this);
+
+        $resourceId = $this::resourceIdClass()::fromString($value);
 
         $this->assertInstanceOf(ResourceId::class, $resourceId);
     }
@@ -63,9 +65,11 @@ public function itCanBeConstructedFromAValidMollieResourceIdString(string $value
      * @test
      * @dataProvider validMollieResourceIds
      */
-    public function itCanBeCastedToAString(string $value): void
+    public function itCanBeCastedToAString(callable $resolveValue): void
     {
-        $resourceId = $this->resourceIdClass()::fromString($value);
+        $value = $resolveValue($this);
+
+        $resourceId = $this::resourceIdClass()::fromString($value);
 
         $this->assertSame($value, (string) $resourceId);
     }
@@ -74,9 +78,11 @@ public function itCanBeCastedToAString(string $value): void
      * @test
      * @dataProvider validMollieResourceIds
      */
-    public function itCanReturnItsValue(string $value): void
+    public function itCanReturnItsValue(callable $resolveValue): void
     {
-        $resourceId = $this->resourceIdClass()::fromString($value);
+        $value = $resolveValue($this);
+
+        $resourceId = $this::resourceIdClass()::fromString($value);
 
         $this->assertSame($value, $resourceId->value());
     }
@@ -85,13 +91,15 @@ public function itCanReturnItsValue(string $value): void
      * @test
      * @dataProvider validMollieResourceIds
      */
-    public function itCanBeSerialized(string $value): void
+    public function itCanBeSerialized(callable $resolveValue): void
     {
-        $resourceId = $this->resourceIdClass()::fromString($value);
+        $value = $resolveValue($this);
+
+        $resourceId = $this::resourceIdClass()::fromString($value);
 
         $serializedResourceId = serialize($resourceId);
 
-        $this->assertEquals($resourceId, unserialize($serializedResourceId));
+        $this->assertEquals($resourceId, unserialize($serializedResourceId, [$this::resourceIdClass()]));
     }
 
     /**
@@ -99,7 +107,7 @@ public function itCanBeSerialized(string $value): void
      */
     public function itCanBeUsedAsAResourceId(): void
     {
-        $resourceId = $this->resourceIdClass()::fromString($this->expectedPrefix() . Str::random(8));
+        $resourceId = $this::resourceIdClass()::fromString($this::expectedPrefix() . Str::random(8));
 
         $this->assertInstanceOf(ResourceId::class, $resourceId);
     }
diff --git a/src/WebhookPayloadFragmentTest.php b/src/WebhookPayloadFragmentTest.php
index 389d902..d2ccb94 100644
--- a/src/WebhookPayloadFragmentTest.php
+++ b/src/WebhookPayloadFragmentTest.php
@@ -12,7 +12,7 @@
 
 final class WebhookPayloadFragmentTest extends TestCase
 {
-    public function keys(): Generator
+    public static function keys(): Generator
     {
         yield 'No keys' => [''];
         yield 'Single key' => ['foo'];
@@ -34,7 +34,7 @@ public function itCanBeConstructedFromKeys(string ...$keys): void
         $this->assertEmpty($payloadFragment->values());
     }
 
-    public function values(): Generator
+    public static function values(): Generator
     {
         yield 'No values' => [
             [],