diff --git a/CLAUDE.md b/CLAUDE.md
index b6d4d91..798a067 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -116,7 +116,8 @@ inline retry notice (HTTP 502). The controller resolves the api key from the pay
 config and fetches via `Quickpay/ClientFactory`.
 
 `Command/DoctorCommand` (`setono:sylius-quickpay:doctor`) machine-checks the README's Troubleshooting
-section per configured gateway: api key ping, private key HMAC self-test (`CallbackValidator`), agreement
+section per configured gateway: api key (via the shared `Quickpay/ApiKeyVerifier` ping-then-payments
+probe), private key HMAC self-test (`CallbackValidator`), agreement
 existence (`GET agreements/{id}`, failing open on permission errors), order prefix length + cross-gateway
 uniqueness, and notify-route registration; `--live` creates a money-less test payment and attempts the
 link PUT to surface the missing-permission 403. Non-zero exit on any failed check; warnings don't fail.
@@ -195,8 +196,11 @@ in that folder) and need `assets:install` in the host app.
   configs stored under the pre-2.0 option names (`apikey`/`privatekey`/`agreement` →
   `api_key`/`private_key`/`agreement_id`, the last normalized to int/null for the integer field) and folds
   a stored `auto_capture` into `use_authorize` (enabled → `false`). The `api_key` carries a `QuickpayCredentials` constraint
-  (sylius group) whose validator pings Quickpay via `Quickpay/ClientFactory` (symfony/http-client
-  capped at 5s) — an explicit 401/403 raises a violation, anything else fails open.
+  (sylius group) whose validator verifies the key through `Quickpay/ApiKeyVerifier` (shared with the
+  doctor command; backed by `Quickpay/ClientFactory`, symfony/http-client capped at 5s): ping first,
+  falling back to a one-item `/payments` read because Quickpay answers 401 on `/ping` both for an
+  invalid key and for a valid key whose api user lacks the `/ping` permission (verified live) — an
+  explicit 401/403 from the probe raises a violation, anything else fails open.
   Sylius' admin form theme ignores Symfony's `help_html` option, so the
   `payment_methods` docs link renders through the plugin's own form theme
   (`Resources/views/form/theme.html.twig`, scoped to that field's block prefix and registered by
diff --git a/README.md b/README.md
index a178fc4..025912c 100644
--- a/README.md
+++ b/README.md
@@ -122,10 +122,11 @@ out the gateway configuration:
 | Synchronized operations | Run capture, refund and cancel synchronously instead of relying on the Quickpay callback |
 | Branding id | *(optional)* The payment window branding to use |
 
-When you save the payment method, the plugin verifies the API key against Quickpay's API (a lightweight
-ping) and rejects the form if Quickpay rejects the key — a typo'd key is caught immediately instead of by
-the first customer whose checkout fails. If Quickpay cannot be reached, the check is skipped so an outage
-never blocks saving.
+When you save the payment method, the plugin verifies the API key against Quickpay's API and rejects the
+form if Quickpay rejects the key — a typo'd key is caught immediately instead of by the first customer
+whose checkout fails. A valid key whose API user lacks the `/ping` permission is verified through a
+`/payments` read instead, so a locked-down API user never blocks saving; neither does an unreachable
+Quickpay — the check fails open on anything but an explicit rejection.
 
 ## How it works
 
diff --git a/src/Command/DoctorCommand.php b/src/Command/DoctorCommand.php
index f0997aa..2718c75 100644
--- a/src/Command/DoctorCommand.php
+++ b/src/Command/DoctorCommand.php
@@ -12,8 +12,9 @@
 use Setono\Quickpay\Exception\UnauthorizedException;
 use Setono\Quickpay\Request\Payment\CreateLinkRequest;
 use Setono\Quickpay\Request\Payment\CreatePaymentRequest;
-use Setono\Quickpay\Request\Payment\PaymentsQuery;
 use Setono\SyliusQuickpayPlugin\Quickpay\ApiKeyResolver;
+use Setono\SyliusQuickpayPlugin\Quickpay\ApiKeyVerification;
+use Setono\SyliusQuickpayPlugin\Quickpay\ApiKeyVerifierInterface;
 use Setono\SyliusQuickpayPlugin\Quickpay\ClientFactoryInterface;
 use Sylius\Bundle\PayumBundle\Model\GatewayConfigInterface;
 use Sylius\Component\Resource\Repository\RepositoryInterface;
@@ -49,6 +50,7 @@ final class DoctorCommand extends Command
      */
     public function __construct(
         private readonly ClientFactoryInterface $clientFactory,
+        private readonly ApiKeyVerifierInterface $apiKeyVerifier,
         private readonly RepositoryInterface $gatewayConfigRepository,
         private readonly RouterInterface $router,
     ) {
@@ -164,26 +166,8 @@ private function checkApiKey(SymfonyStyle $io, array $config): ?ClientInterface
             return null;
         }
 
-        $client = $this->clientFactory->create($apiKey);
-
-        try {
-            $client->ping();
-
-            $this->ok($io, 'The api key is accepted by Quickpay');
-
-            return $client;
-        } catch (UnauthorizedException|ForbiddenException) {
-            // Quickpay answers 401 both for an invalid key and for a valid key whose api user
-            // lacks the /ping permission (verified live), so fall through to a request every
-            // integration needs anyway
-        } catch (\Throwable $e) {
-            $this->warn($io, sprintf('Could not verify the api key, Quickpay did not answer: %s', $e->getMessage()));
-
-            return null;
-        }
-
         try {
-            $client->payments()->getPage(new PaymentsQuery(pageSize: 1));
+            $verification = $this->apiKeyVerifier->verify($apiKey);
         } catch (UnauthorizedException|ForbiddenException) {
             $this->fail($io, 'Quickpay rejects the api key — use the API user\'s key (Settings → Users in the Quickpay manager), not a Payment Window agreement\'s');
 
@@ -194,9 +178,12 @@ private function checkApiKey(SymfonyStyle $io, array $config): ?ClientInterface
             return null;
         }
 
-        $this->ok($io, 'The api key is accepted by Quickpay (verified via /payments — the api user lacks the /ping permission, which is harmless)');
+        $this->ok($io, match ($verification) {
+            ApiKeyVerification::ViaPing => 'The api key is accepted by Quickpay',
+            ApiKeyVerification::ViaPayments => 'The api key is accepted by Quickpay (verified via /payments — the api user lacks the /ping permission, which is harmless)',
+        });
 
-        return $client;
+        return $this->clientFactory->create($apiKey);
     }
 
     /**
diff --git a/src/Quickpay/ApiKeyVerification.php b/src/Quickpay/ApiKeyVerification.php
new file mode 100644
index 0000000..14dcb2a
--- /dev/null
+++ b/src/Quickpay/ApiKeyVerification.php
@@ -0,0 +1,16 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Setono\SyliusQuickpayPlugin\Quickpay;
+
+/**
+ * How an api key was verified. Both cases mean the key is valid — ViaPayments additionally tells
+ * that the api user lacks the /ping permission, which is harmless but worth surfacing in
+ * diagnostics. A key that could not be verified never yields a verification: the verifier throws.
+ */
+enum ApiKeyVerification
+{
+    case ViaPing;
+    case ViaPayments;
+}
diff --git a/src/Quickpay/ApiKeyVerifier.php b/src/Quickpay/ApiKeyVerifier.php
new file mode 100644
index 0000000..311bae4
--- /dev/null
+++ b/src/Quickpay/ApiKeyVerifier.php
@@ -0,0 +1,33 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Setono\SyliusQuickpayPlugin\Quickpay;
+
+use Setono\Quickpay\Exception\ForbiddenException;
+use Setono\Quickpay\Exception\UnauthorizedException;
+use Setono\Quickpay\Request\Payment\PaymentsQuery;
+
+final class ApiKeyVerifier implements ApiKeyVerifierInterface
+{
+    public function __construct(private readonly ClientFactoryInterface $clientFactory)
+    {
+    }
+
+    public function verify(string $apiKey): ApiKeyVerification
+    {
+        $client = $this->clientFactory->create($apiKey);
+
+        try {
+            $client->ping();
+
+            return ApiKeyVerification::ViaPing;
+        } catch (UnauthorizedException|ForbiddenException) {
+            // Either an invalid key or a valid key without the /ping permission — /payments decides
+        }
+
+        $client->payments()->getPage(new PaymentsQuery(pageSize: 1));
+
+        return ApiKeyVerification::ViaPayments;
+    }
+}
diff --git a/src/Quickpay/ApiKeyVerifierInterface.php b/src/Quickpay/ApiKeyVerifierInterface.php
new file mode 100644
index 0000000..3479e44
--- /dev/null
+++ b/src/Quickpay/ApiKeyVerifierInterface.php
@@ -0,0 +1,22 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Setono\SyliusQuickpayPlugin\Quickpay;
+
+use Setono\Quickpay\Exception\ForbiddenException;
+use Setono\Quickpay\Exception\UnauthorizedException;
+
+interface ApiKeyVerifierInterface
+{
+    /**
+     * Verifies the api key against Quickpay and tells how it was verified. Quickpay answers 401 on
+     * /ping both for an invalid key and for a valid key whose api user merely lacks the /ping
+     * permission (verified live), so a rejected ping falls back to a one-item /payments read — a
+     * permission every integration needs.
+     *
+     * @throws UnauthorizedException|ForbiddenException when Quickpay rejects the key
+     * @throws \Throwable when Quickpay did not answer, so nothing is proven either way
+     */
+    public function verify(string $apiKey): ApiKeyVerification;
+}
diff --git a/src/Resources/config/services.xml b/src/Resources/config/services.xml
index c2122f6..d3d025c 100644
--- a/src/Resources/config/services.xml
+++ b/src/Resources/config/services.xml
@@ -78,9 +78,16 @@
         <service id="Setono\SyliusQuickpayPlugin\Quickpay\ClientFactoryInterface"
                  alias="Setono\SyliusQuickpayPlugin\Quickpay\ClientFactory"/>
 
+        <service id="Setono\SyliusQuickpayPlugin\Quickpay\ApiKeyVerifier">
+            <argument type="service" id="Setono\SyliusQuickpayPlugin\Quickpay\ClientFactoryInterface"/>
+        </service>
+
+        <service id="Setono\SyliusQuickpayPlugin\Quickpay\ApiKeyVerifierInterface"
+                 alias="Setono\SyliusQuickpayPlugin\Quickpay\ApiKeyVerifier"/>
+
         <!-- Validator -->
         <service id="Setono\SyliusQuickpayPlugin\Validator\Constraints\QuickpayCredentialsValidator">
-            <argument type="service" id="Setono\SyliusQuickpayPlugin\Quickpay\ClientFactoryInterface"/>
+            <argument type="service" id="Setono\SyliusQuickpayPlugin\Quickpay\ApiKeyVerifierInterface"/>
 
             <tag name="validator.constraint_validator"/>
         </service>
@@ -88,6 +95,7 @@
         <!-- Command -->
         <service id="Setono\SyliusQuickpayPlugin\Command\DoctorCommand">
             <argument type="service" id="Setono\SyliusQuickpayPlugin\Quickpay\ClientFactoryInterface"/>
+            <argument type="service" id="Setono\SyliusQuickpayPlugin\Quickpay\ApiKeyVerifierInterface"/>
             <argument type="service" id="sylius.repository.gateway_config"/>
             <argument type="service" id="router"/>
 
diff --git a/src/Validator/Constraints/QuickpayCredentialsValidator.php b/src/Validator/Constraints/QuickpayCredentialsValidator.php
index 6910335..6ea3603 100644
--- a/src/Validator/Constraints/QuickpayCredentialsValidator.php
+++ b/src/Validator/Constraints/QuickpayCredentialsValidator.php
@@ -6,14 +6,14 @@
 
 use Setono\Quickpay\Exception\ForbiddenException;
 use Setono\Quickpay\Exception\UnauthorizedException;
-use Setono\SyliusQuickpayPlugin\Quickpay\ClientFactoryInterface;
+use Setono\SyliusQuickpayPlugin\Quickpay\ApiKeyVerifierInterface;
 use Symfony\Component\Validator\Constraint;
 use Symfony\Component\Validator\ConstraintValidator;
 use Symfony\Component\Validator\Exception\UnexpectedTypeException;
 
 final class QuickpayCredentialsValidator extends ConstraintValidator
 {
-    public function __construct(private readonly ClientFactoryInterface $clientFactory)
+    public function __construct(private readonly ApiKeyVerifierInterface $apiKeyVerifier)
     {
     }
 
@@ -32,7 +32,7 @@ public function validate(mixed $value, Constraint $constraint): void
         }
 
         try {
-            $this->clientFactory->create($value)->ping();
+            $this->apiKeyVerifier->verify($value);
         } catch (UnauthorizedException|ForbiddenException) {
             $this->context->buildViolation($constraint->message)->addViolation();
         } catch (\Throwable) {
diff --git a/tests/Command/DoctorCommandTest.php b/tests/Command/DoctorCommandTest.php
index 90d5ac3..3a6978f 100644
--- a/tests/Command/DoctorCommandTest.php
+++ b/tests/Command/DoctorCommandTest.php
@@ -14,6 +14,7 @@
 use Setono\Quickpay\Exception\ForbiddenException;
 use Setono\Quickpay\Exception\NotFoundException;
 use Setono\SyliusQuickpayPlugin\Command\DoctorCommand;
+use Setono\SyliusQuickpayPlugin\Quickpay\ApiKeyVerifier;
 use Setono\SyliusQuickpayPlugin\Quickpay\ClientFactoryInterface;
 use Setono\SyliusQuickpayPlugin\Tests\Quickpay\QueuedResponsesHttpClient;
 use Sylius\Bundle\PayumBundle\Model\GatewayConfigInterface;
@@ -532,8 +533,10 @@ private static function routes(bool $withNotifyRoute): RouteCollection
     private function executeCommand(array $input = []): CommandTester
     {
         $application = new Application();
+        // A real verifier over the same client factory keeps the probe part of what is tested
         $application->add(new DoctorCommand(
             $this->clientFactory->reveal(),
+            new ApiKeyVerifier($this->clientFactory->reveal()),
             $this->gatewayConfigRepository->reveal(),
             $this->router->reveal(),
         ));
diff --git a/tests/Form/Type/GatewayConfigurationTypeTest.php b/tests/Form/Type/GatewayConfigurationTypeTest.php
index ca23029..fb9bb54 100644
--- a/tests/Form/Type/GatewayConfigurationTypeTest.php
+++ b/tests/Form/Type/GatewayConfigurationTypeTest.php
@@ -7,10 +7,10 @@
 use Nyholm\Psr7\Response;
 use Prophecy\Argument;
 use Prophecy\PhpUnit\ProphecyTrait;
-use Setono\Quickpay\Client\ClientInterface;
 use Setono\Quickpay\Exception\UnauthorizedException;
 use Setono\SyliusQuickpayPlugin\Form\Type\GatewayConfigurationType;
-use Setono\SyliusQuickpayPlugin\Quickpay\ClientFactoryInterface;
+use Setono\SyliusQuickpayPlugin\Quickpay\ApiKeyVerification;
+use Setono\SyliusQuickpayPlugin\Quickpay\ApiKeyVerifierInterface;
 use Setono\SyliusQuickpayPlugin\Validator\Constraints\QuickpayCredentialsValidator;
 use Symfony\Component\Form\Extension\Validator\ValidatorExtension;
 use Symfony\Component\Form\FormExtensionInterface;
@@ -32,17 +32,11 @@ final class GatewayConfigurationTypeTest extends TypeTestCase
      */
     protected function getExtensions(): array
     {
-        $client = $this->prophesize(ClientInterface::class);
-        $client->ping()->willReturn(true);
+        $apiKeyVerifier = $this->prophesize(ApiKeyVerifierInterface::class);
+        $apiKeyVerifier->verify(Argument::type('string'))->willReturn(ApiKeyVerification::ViaPing);
+        $apiKeyVerifier->verify('rejected-api-key')->willThrow(new UnauthorizedException(new Response(401)));
 
-        $rejectingClient = $this->prophesize(ClientInterface::class);
-        $rejectingClient->ping()->willThrow(new UnauthorizedException(new Response(401)));
-
-        $clientFactory = $this->prophesize(ClientFactoryInterface::class);
-        $clientFactory->create(Argument::type('string'))->willReturn($client);
-        $clientFactory->create('rejected-api-key')->willReturn($rejectingClient);
-
-        $credentialsValidator = new QuickpayCredentialsValidator($clientFactory->reveal());
+        $credentialsValidator = new QuickpayCredentialsValidator($apiKeyVerifier->reveal());
 
         $validator = Validation::createValidatorBuilder()
             ->setConstraintValidatorFactory(new class($credentialsValidator) implements ConstraintValidatorFactoryInterface {
diff --git a/tests/Quickpay/ApiKeyVerifierTest.php b/tests/Quickpay/ApiKeyVerifierTest.php
new file mode 100644
index 0000000..bd869e3
--- /dev/null
+++ b/tests/Quickpay/ApiKeyVerifierTest.php
@@ -0,0 +1,99 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Setono\SyliusQuickpayPlugin\Tests\Quickpay;
+
+use Nyholm\Psr7\Response;
+use PHPUnit\Framework\TestCase;
+use Prophecy\PhpUnit\ProphecyTrait;
+use Setono\Quickpay\Client\Client;
+use Setono\Quickpay\Exception\InternalServerErrorException;
+use Setono\Quickpay\Exception\UnauthorizedException;
+use Setono\SyliusQuickpayPlugin\Quickpay\ApiKeyVerification;
+use Setono\SyliusQuickpayPlugin\Quickpay\ApiKeyVerifier;
+use Setono\SyliusQuickpayPlugin\Quickpay\ClientFactoryInterface;
+
+final class ApiKeyVerifierTest extends TestCase
+{
+    use ProphecyTrait;
+
+    /**
+     * @test
+     */
+    public function it_verifies_a_key_with_the_ping_permission(): void
+    {
+        $verifier = $this->createVerifier(new Response(200, [], '{}'));
+
+        self::assertSame(ApiKeyVerification::ViaPing, $verifier->verify('the-api-key'));
+    }
+
+    /**
+     * Quickpay answers 401 on /ping both for an invalid key and for a valid key whose api user
+     * lacks the /ping permission (verified live), so a rejected ping is decided by /payments
+     *
+     * @test
+     */
+    public function it_verifies_a_key_without_the_ping_permission_through_payments(): void
+    {
+        $verifier = $this->createVerifier(
+            new Response(401, [], '{"message": "Invalid API key"}'),
+            new Response(200, [], '[]'),
+        );
+
+        self::assertSame(ApiKeyVerification::ViaPayments, $verifier->verify('the-api-key'));
+    }
+
+    /**
+     * @test
+     */
+    public function it_throws_when_quickpay_rejects_the_key_on_both_endpoints(): void
+    {
+        $verifier = $this->createVerifier(
+            new Response(401, [], '{"message": "Invalid API key"}'),
+            new Response(401, [], '{"message": "Invalid API key"}'),
+        );
+
+        $this->expectException(UnauthorizedException::class);
+
+        $verifier->verify('the-api-key');
+    }
+
+    /**
+     * @test
+     */
+    public function it_propagates_an_unanswered_ping(): void
+    {
+        $verifier = $this->createVerifier(new Response(500, [], '{"message": "boom"}'));
+
+        $this->expectException(InternalServerErrorException::class);
+
+        $verifier->verify('the-api-key');
+    }
+
+    /**
+     * @test
+     */
+    public function it_propagates_an_unanswered_payments_fallback(): void
+    {
+        $verifier = $this->createVerifier(
+            new Response(401, [], '{"message": "Invalid API key"}'),
+            new Response(500, [], '{"message": "boom"}'),
+        );
+
+        $this->expectException(InternalServerErrorException::class);
+
+        $verifier->verify('the-api-key');
+    }
+
+    private function createVerifier(Response ...$responses): ApiKeyVerifier
+    {
+        $clientFactory = $this->prophesize(ClientFactoryInterface::class);
+        $clientFactory
+            ->create('the-api-key')
+            ->willReturn(new Client('the-api-key', new QueuedResponsesHttpClient(...$responses)))
+        ;
+
+        return new ApiKeyVerifier($clientFactory->reveal());
+    }
+}
diff --git a/tests/Validator/Constraints/QuickpayCredentialsValidatorTest.php b/tests/Validator/Constraints/QuickpayCredentialsValidatorTest.php
index f1b957f..04a3349 100644
--- a/tests/Validator/Constraints/QuickpayCredentialsValidatorTest.php
+++ b/tests/Validator/Constraints/QuickpayCredentialsValidatorTest.php
@@ -8,10 +8,10 @@
 use Prophecy\Argument;
 use Prophecy\PhpUnit\ProphecyTrait;
 use Prophecy\Prophecy\ObjectProphecy;
-use Setono\Quickpay\Client\ClientInterface;
 use Setono\Quickpay\Exception\InternalServerErrorException;
 use Setono\Quickpay\Exception\UnauthorizedException;
-use Setono\SyliusQuickpayPlugin\Quickpay\ClientFactoryInterface;
+use Setono\SyliusQuickpayPlugin\Quickpay\ApiKeyVerification;
+use Setono\SyliusQuickpayPlugin\Quickpay\ApiKeyVerifierInterface;
 use Setono\SyliusQuickpayPlugin\Validator\Constraints\QuickpayCredentials;
 use Setono\SyliusQuickpayPlugin\Validator\Constraints\QuickpayCredentialsValidator;
 use Symfony\Component\Validator\Constraints\NotBlank;
@@ -25,20 +25,14 @@ final class QuickpayCredentialsValidatorTest extends ConstraintValidatorTestCase
 {
     use ProphecyTrait;
 
-    /** @var ObjectProphecy<ClientFactoryInterface> */
-    private ObjectProphecy $clientFactory;
-
-    /** @var ObjectProphecy<ClientInterface> */
-    private ObjectProphecy $client;
+    /** @var ObjectProphecy<ApiKeyVerifierInterface> */
+    private ObjectProphecy $apiKeyVerifier;
 
     protected function createValidator(): QuickpayCredentialsValidator
     {
-        $this->client = $this->prophesize(ClientInterface::class);
-
-        $this->clientFactory = $this->prophesize(ClientFactoryInterface::class);
-        $this->clientFactory->create('the-api-key')->willReturn($this->client);
+        $this->apiKeyVerifier = $this->prophesize(ApiKeyVerifierInterface::class);
 
-        return new QuickpayCredentialsValidator($this->clientFactory->reveal());
+        return new QuickpayCredentialsValidator($this->apiKeyVerifier->reveal());
     }
 
     /**
@@ -46,7 +40,22 @@ protected function createValidator(): QuickpayCredentialsValidator
      */
     public function it_accepts_a_key_quickpay_accepts(): void
     {
-        $this->client->ping()->willReturn(true);
+        $this->apiKeyVerifier->verify('the-api-key')->willReturn(ApiKeyVerification::ViaPing);
+
+        $this->validator->validate('the-api-key', new QuickpayCredentials());
+
+        $this->assertNoViolation();
+    }
+
+    /**
+     * A valid key whose api user lacks the /ping permission is verified through /payments and must
+     * not raise a violation (see the verifier and issue #141)
+     *
+     * @test
+     */
+    public function it_accepts_a_key_verified_through_the_payments_fallback(): void
+    {
+        $this->apiKeyVerifier->verify('the-api-key')->willReturn(ApiKeyVerification::ViaPayments);
 
         $this->validator->validate('the-api-key', new QuickpayCredentials());
 
@@ -58,7 +67,7 @@ public function it_accepts_a_key_quickpay_accepts(): void
      */
     public function it_raises_a_violation_when_quickpay_rejects_the_key(): void
     {
-        $this->client->ping()->willThrow(new UnauthorizedException(new Response(401)));
+        $this->apiKeyVerifier->verify('the-api-key')->willThrow(new UnauthorizedException(new Response(401)));
 
         $constraint = new QuickpayCredentials();
         $this->validator->validate('the-api-key', $constraint);
@@ -71,7 +80,7 @@ public function it_raises_a_violation_when_quickpay_rejects_the_key(): void
      */
     public function it_fails_open_when_quickpay_cannot_be_reached(): void
     {
-        $this->client->ping()->willThrow(new InternalServerErrorException(new Response(500)));
+        $this->apiKeyVerifier->verify('the-api-key')->willThrow(new InternalServerErrorException(new Response(500)));
 
         $this->validator->validate('the-api-key', new QuickpayCredentials());
 
@@ -83,7 +92,7 @@ public function it_fails_open_when_quickpay_cannot_be_reached(): void
      */
     public function it_ignores_empty_values(): void
     {
-        $this->clientFactory->create(Argument::any())->shouldNotBeCalled();
+        $this->apiKeyVerifier->verify(Argument::any())->shouldNotBeCalled();
 
         $this->validator->validate(null, new QuickpayCredentials());
         $this->validator->validate('', new QuickpayCredentials());