diff --git a/config/services_smoketest.yaml b/config/services_smoketest.yaml
new file mode 100644
index 000000000..0315850ec
--- /dev/null
+++ b/config/services_smoketest.yaml
@@ -0,0 +1,31 @@
+# Use this service definition file to override services and parameters in the test environment.
+# For example to mock certain services, or override a password for test.
+
+parameters:
+  middleware_credentials_password: secret
+
+services:
+  surfnet_stepup_self_service_self_service.service.sms_second_factor:
+    class: Surfnet\StepupSelfService\SelfServiceBundle\Tests\TestDouble\Service\SmsSecondFactorService
+    arguments:
+        - "@surfnet_stepup_self_service_self_service.service.command"
+
+
+  # The middleware client bundle guzzle client is overloaded to be able to pass the testcookie to the ensure MW is
+  # loaded in test mode. This way people setting the testcookie in prod will not switch their mw api into testmode
+  # resulting in 500 errors.
+  surfnet_stepup_middleware_client.guzzle.api:
+    public: false
+    class: GuzzleHttp\Client
+    factory: ['Surfnet\StepupSelfService\SelfServiceBundle\Tests\TestDouble\Factory\GuzzleApiFactory', createApiGuzzleClient]
+    arguments:
+        - "%middleware_url_api%"
+        - "%middleware_credentials_username%"
+        - "%middleware_credentials_password%"
+
+  surfnet_stepup_middleware_client.guzzle.commands:
+    public: false
+    class: GuzzleHttp\Client
+    factory: ['Surfnet\StepupSelfService\SelfServiceBundle\Tests\TestDouble\Factory\GuzzleApiFactory', createCommandGuzzleClient]
+    arguments:
+        - "%middleware_url_command_api%"
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