diff --git a/composer.json b/composer.json
index baa1b95c..bb9319c1 100644
--- a/composer.json
+++ b/composer.json
@@ -140,7 +140,7 @@
         "test:db:ms": "DB_DRIVER=mssql composer test:db:sqlite",
         "test:api": "bin/test/run-api-tests.sh",
         "infect:ci:base": "infection --threads=4 --log-verbosity=default --only-covered --only-covering-test-cases --skip-initial-tests",
-        "infect:ci:unit": "@infect:ci:base --coverage=build/coverage-unit --min-msi=80",
+        "infect:ci:unit": "@infect:ci:base --coverage=build/coverage-unit --min-msi=83",
         "infect:ci:db": "@infect:ci:base --coverage=build/coverage-db --min-msi=95 --configuration=infection-db.json",
         "infect:ci": "@parallel infect:ci:unit infect:ci:db",
         "infect:test": [
diff --git a/module/Rest/test/Action/Visit/OrphanVisitsActionTest.php b/module/Rest/test/Action/Visit/OrphanVisitsActionTest.php
index 9fec7e1f..43209e51 100644
--- a/module/Rest/test/Action/Visit/OrphanVisitsActionTest.php
+++ b/module/Rest/test/Action/Visit/OrphanVisitsActionTest.php
@@ -45,13 +45,16 @@ class OrphanVisitsActionTest extends TestCase
         $orphanVisits = $this->visitsHelper->orphanVisits(Argument::type(VisitsParams::class))->willReturn(
             new Paginator(new ArrayAdapter($visits)),
         );
+        $visitsAmount = count($visits);
         $transform = $this->orphanVisitTransformer->transform(Argument::type(Visit::class))->willReturn([]);
 
+        /** @var JsonResponse $response */
         $response = $this->action->handle(ServerRequestFactory::fromGlobals());
+        $payload = $response->getPayload();
 
-        self::assertInstanceOf(JsonResponse::class, $response);
+        self::assertCount($visitsAmount, $payload['visits']['data']);
         self::assertEquals(200, $response->getStatusCode());
         $orphanVisits->shouldHaveBeenCalledOnce();
-        $transform->shouldHaveBeenCalledTimes(count($visits));
+        $transform->shouldHaveBeenCalledTimes($visitsAmount);
     }
 }
diff --git a/module/Rest/test/ApiKey/Model/RoleDefinitionTest.php b/module/Rest/test/ApiKey/Model/RoleDefinitionTest.php
new file mode 100644
index 00000000..8e6a58ad
--- /dev/null
+++ b/module/Rest/test/ApiKey/Model/RoleDefinitionTest.php
@@ -0,0 +1,32 @@
+<?php
+
+declare(strict_types=1);
+
+namespace ShlinkioTest\Shlink\Rest\ApiKey\Model;
+
+use PHPUnit\Framework\TestCase;
+use Shlinkio\Shlink\Core\Entity\Domain;
+use Shlinkio\Shlink\Rest\ApiKey\Model\RoleDefinition;
+use Shlinkio\Shlink\Rest\ApiKey\Role;
+
+class RoleDefinitionTest extends TestCase
+{
+    /** @test */
+    public function forAuthoredShortUrlsCreatesRoleDefinitionAsExpected(): void
+    {
+        $definition = RoleDefinition::forAuthoredShortUrls();
+
+        self::assertEquals(Role::AUTHORED_SHORT_URLS, $definition->roleName());
+        self::assertEquals([], $definition->meta());
+    }
+
+    /** @test */
+    public function forDomainCreatesRoleDefinitionAsExpected(): void
+    {
+        $domain = Domain::withAuthority('foo.com')->setId('123');
+        $definition = RoleDefinition::forDomain($domain);
+
+        self::assertEquals(Role::DOMAIN_SPECIFIC, $definition->roleName());
+        self::assertEquals(['domain_id' => '123', 'authority' => 'foo.com'], $definition->meta());
+    }
+}