diff --git a/.env.test b/.env.test
index 959ef8ad..09379dc7 100644
--- a/.env.test
+++ b/.env.test
@@ -1,7 +1,7 @@
 # define your env variables for the test env here
 KERNEL_CLASS='App\Kernel'
 APP_SECRET='$ecretf0rt3st'
-SYMFONY_DEPRECATIONS_HELPER=999999
+SYMFONY_DEPRECATIONS_HELPER=weak
 PANTHER_APP_ENV=panther
 PANTHER_ERROR_SCREENSHOT_DIR=./var/error-screenshots
 
@@ -9,4 +9,4 @@ APP_SECURITY_OAUTH_DISCORD_SERVER_ID=
 
 APP_SECURITY_API_ALLOWED_KEYS=test_key
 
-APP_URL_TEAMSPEAK='teamspeak.example.com'
+APP_URL_TEAMSPEAK='ts3server://ts.localhost.com?password=test'
diff --git a/src/Form/Mod/Dto/ModFormDto.php b/src/Form/Mod/Dto/ModFormDto.php
index abbb1f8f..c71f922a 100644
--- a/src/Form/Mod/Dto/ModFormDto.php
+++ b/src/Form/Mod/Dto/ModFormDto.php
@@ -13,9 +13,9 @@
 use Ramsey\Uuid\UuidInterface;
 use Symfony\Component\Validator\Constraints as Assert;
 
-#[UniqueSteamWorkshopMod(groups: [ModSourceEnum::STEAM_WORKSHOP->value])]
+#[UniqueSteamWorkshopMod(groups: [ModSourceEnum::STEAM_WORKSHOP->value], errorPath: 'url')]
 #[SteamWorkshopArma3ModUrl(groups: [ModSourceEnum::STEAM_WORKSHOP->value], errorPath: 'url', nameErrorPath: 'name')]
-#[UniqueDirectoryMod(groups: [ModSourceEnum::DIRECTORY->value])]
+#[UniqueDirectoryMod(groups: [ModSourceEnum::DIRECTORY->value], errorPath: 'directory')]
 class ModFormDto extends AbstractFormDto
 {
     protected ?UuidInterface $id = null;
diff --git a/src/Service/SteamApiClient/Helper/SteamHelper.php b/src/Service/SteamApiClient/Helper/SteamHelper.php
index ecca0700..236d73a7 100644
--- a/src/Service/SteamApiClient/Helper/SteamHelper.php
+++ b/src/Service/SteamApiClient/Helper/SteamHelper.php
@@ -9,8 +9,8 @@
 
 class SteamHelper
 {
-    public const ITEM_URL_REGEX = '~^https://steamcommunity\.com/(?:sharedfiles|workshop)/filedetails/\?id=(\d+)$~';
-    public const APP_URL_REGEX = '~^https://store\.steampowered\.com/app/(\d+)~';
+    private const ITEM_URL_REGEX = '~^https://steamcommunity\.com/(?:sharedfiles|workshop)/filedetails/\?id=(\d+)$~';
+    private const APP_URL_REGEX = '~^https://store\.steampowered\.com/app/(\d+)~';
 
     public static function profileIdToProfileUrl(int $profileId): string
     {
diff --git a/src/Validator/Mod/UniqueDirectoryModValidator.php b/src/Validator/Mod/UniqueDirectoryModValidator.php
index 15624d53..70266a76 100644
--- a/src/Validator/Mod/UniqueDirectoryModValidator.php
+++ b/src/Validator/Mod/UniqueDirectoryModValidator.php
@@ -23,8 +23,12 @@ public function validate(mixed $value, Constraint $constraint): void
         }
 
         $directory = $value->getDirectory();
+        if ('' === $directory || null === $directory) {
+            return;
+        }
+
         $id = $value->getId();
-        if (!$directory || $this->isColumnValueUnique(DirectoryMod::class, ['directory' => $directory], $id)) {
+        if ($this->isColumnValueUnique(DirectoryMod::class, ['directory' => $directory], $id)) {
             return;
         }
 
diff --git a/src/Validator/WindowsDirectoryName.php b/src/Validator/WindowsDirectoryName.php
index c2ed62f7..3c34b395 100644
--- a/src/Validator/WindowsDirectoryName.php
+++ b/src/Validator/WindowsDirectoryName.php
@@ -13,7 +13,7 @@ class WindowsDirectoryName extends Regex
     public $message = 'Invalid directory name.';
 
     /** @var string */
-    public $pattern = '/^.{1,248}[^<>:"\/\|?*]$/ui';
+    public $pattern = '/^.[^\<\>\:\"\/\|\?\*]{1,248}$/ui';
 
     public function __construct(
         string $pattern = null,
diff --git a/tests/_support/FunctionalTester.php b/tests/_support/FunctionalTester.php
index 7e278414..0c85cc56 100644
--- a/tests/_support/FunctionalTester.php
+++ b/tests/_support/FunctionalTester.php
@@ -4,6 +4,8 @@
 
 namespace App\Tests;
 
+use App\Entity\User\User;
+use App\Test\Traits\TimeTrait;
 use Codeception\Actor;
 use Codeception\Lib\Friend;
 
@@ -25,8 +27,49 @@
 class FunctionalTester extends Actor
 {
     use _generated\FunctionalTesterActions;
+    use TimeTrait;
 
-    /**
-     * Define custom actions here.
-     */
+    public function amDiscordAuthenticatedAs(string $id, callable $preAuthCallback = null): User
+    {
+        /** @var User $user */
+        $user = $this->grabEntityFromRepository(User::class, ['id' => $id]);
+        if ($preAuthCallback) {
+            $preAuthCallback($user);
+
+            // Refresh user entity to avoid permission issues in subsequent requests
+            $this->haveInRepository($user);
+        }
+        $this->amLoggedInAs($user);
+
+        return $user;
+    }
+
+    public function seeResponseRedirectsTo(string $url): void
+    {
+        $this->seeResponseCodeIsRedirection();
+        $this->seeHttpHeader('Location', $url);
+    }
+
+    public function seeResponseRedirectsToDiscordAuth(): void
+    {
+        $this->seeResponseRedirectsTo('/security/connect/discord');
+    }
+
+    public function seeActionButton(string $tooltip, string $url = null): void
+    {
+        $selector = sprintf('a i[title="%s"]', $tooltip);
+        if ($url) {
+            $selector = sprintf('a[href="%s"] i[title="%s"]', $url, $tooltip);
+        }
+        $this->seeElement($selector);
+    }
+
+    public function dontSeeActionButton(string $tooltip, string $url = null): void
+    {
+        $selector = sprintf('a i[title="%s"]', $tooltip);
+        if ($url) {
+            $selector = sprintf('a[href="%s"] i[title="%s"]', $url, $tooltip);
+        }
+        $this->dontSeeElement($selector);
+    }
 }
diff --git a/tests/functional/Web/Mod/CreateDirectoryModCest.php b/tests/functional/Web/Mod/CreateDirectoryModCest.php
new file mode 100644
index 00000000..6bd94422
--- /dev/null
+++ b/tests/functional/Web/Mod/CreateDirectoryModCest.php
@@ -0,0 +1,177 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Functional\Web\Mod;
+
+use App\DataFixtures\Mod\Directory\ArmaScriptProfilerModFixture;
+use App\DataFixtures\User\RegularUserFixture;
+use App\Entity\Mod\DirectoryMod;
+use App\Entity\Mod\Enum\ModStatusEnum;
+use App\Entity\User\User;
+use App\Tests\FunctionalTester;
+use Symfony\Component\HttpFoundation\Response;
+
+class CreateDirectoryModCest
+{
+    public function _before(FunctionalTester $I): void
+    {
+        $I->stopFollowingRedirects();
+        $I->freezeTime('2020-01-01T00:00:00+00:00');
+    }
+
+    public function createDirectoryModAsUnauthenticatedUser(FunctionalTester $I): void
+    {
+        $I->amOnPage('/mod/create');
+        $I->seeResponseRedirectsToDiscordAuth();
+    }
+
+    public function createDirectoryModAsUnauthorizedUser(FunctionalTester $I): void
+    {
+        $I->amDiscordAuthenticatedAs(RegularUserFixture::ID);
+
+        $I->amOnPage('/mod/create');
+        $I->seeResponseCodeIs(Response::HTTP_FORBIDDEN);
+    }
+
+    public function createDirectoryModAsAuthorizedUser(FunctionalTester $I): void
+    {
+        $user = $I->amDiscordAuthenticatedAs(RegularUserFixture::ID, function (User $user): void {
+            $user->getPermissions()->modCreate = true;
+        });
+
+        $I->amOnPage('/mod/create');
+
+        // Default form values
+        $I->seeOptionIsSelected('Mod source', 'Steam Workshop');
+        $I->seeInField('Mod directory', '');
+        $I->dontSee('Mod status'); // Not visible
+        $I->seeInField('Mod name', '');
+        $I->seeInField('Mod description', '');
+
+        // Fill form
+        $I->selectOption('Mod source', 'Directory');
+        $I->fillField('Mod directory', '@OCAP');
+        $I->fillField('Mod name', 'OCAP');
+        $I->fillField('Mod description', 'OCAP - AAR');
+        $I->click('Create mod');
+
+        $I->seeResponseRedirectsTo('/mod/list');
+
+        /** @var DirectoryMod $mod */
+        $mod = $I->grabEntityFromRepository(DirectoryMod::class, ['directory' => '@OCAP']);
+        $I->assertSame(null, $mod->getStatus());
+        $I->assertSame('OCAP', $mod->getName());
+        $I->assertSame('OCAP - AAR', $mod->getDescription());
+
+        $I->assertSame('2020-01-01T00:00:00+00:00', $mod->getCreatedAt()->format(DATE_ATOM));
+        // $I->assertSame($user, $mod->getCreatedBy()); // FIXME
+        $I->assertSame(null, $mod->getLastUpdatedAt());
+        $I->assertSame(null, $mod->getLastUpdatedBy());
+    }
+
+    public function createDirectoryModAsAuthorizedUserWithChangeModStatusPermission(FunctionalTester $I): void
+    {
+        $user = $I->amDiscordAuthenticatedAs(RegularUserFixture::ID, function (User $user): void {
+            $user->getPermissions()->modCreate = true;
+            $user->getPermissions()->modChangeStatus = true;
+        });
+
+        $I->amOnPage('/mod/create');
+
+        // Default form values
+        $I->seeOptionIsSelected('Mod source', 'Steam Workshop');
+        $I->seeInField('Mod directory', '');
+        $I->seeOptionIsSelected('Mod status', '');
+        $I->seeInField('Mod name', '');
+        $I->seeInField('Mod description', '');
+
+        // Fill form
+        $I->selectOption('Mod source', 'Directory');
+        $I->fillField('Mod directory', '@OCAP');
+        $I->selectOption('Mod status', 'Deprecated');
+        $I->fillField('Mod name', 'OCAP');
+        $I->fillField('Mod description', 'OCAP - AAR');
+        $I->click('Create mod');
+
+        $I->seeResponseRedirectsTo('/mod/list');
+
+        /** @var DirectoryMod $mod */
+        $mod = $I->grabEntityFromRepository(DirectoryMod::class, ['directory' => '@OCAP']);
+        $I->assertSame(ModStatusEnum::DEPRECATED, $mod->getStatus());
+        $I->assertSame('OCAP', $mod->getName());
+        $I->assertSame('OCAP - AAR', $mod->getDescription());
+
+        $I->assertSame('2020-01-01T00:00:00+00:00', $mod->getCreatedAt()->format(DATE_ATOM));
+        // $I->assertSame($user, $mod->getCreatedBy()); // FIXME
+        $I->assertSame(null, $mod->getLastUpdatedAt());
+        $I->assertSame(null, $mod->getLastUpdatedBy());
+    }
+
+    public function createDirectoryModAsAuthorizedUserWhenModAlreadyExists(FunctionalTester $I): void
+    {
+        $I->amDiscordAuthenticatedAs(RegularUserFixture::ID, function (User $user): void {
+            $user->getPermissions()->modCreate = true;
+        });
+
+        $I->amOnPage('/mod/create');
+
+        $I->selectOption('Mod source', 'Directory');
+        $I->fillField('Mod directory', ArmaScriptProfilerModFixture::DIRECTORY);
+        $I->fillField('Mod name', 'Arma Script Profiler');
+        $I->click('Create mod');
+
+        $I->canSeeFormErrorMessage('directory', 'Mod associated with directory "@Arma Script Profiler" already exist.');
+    }
+
+    public function createDirectoryModAsAuthorizedUserWithInvalidDirectoryName(FunctionalTester $I): void
+    {
+        $I->amDiscordAuthenticatedAs(RegularUserFixture::ID, function (User $user): void {
+            $user->getPermissions()->modCreate = true;
+        });
+
+        $I->amOnPage('/mod/create');
+
+        $I->selectOption('Mod source', 'Directory');
+        $I->fillField('Mod directory', '@OC/AP');
+        $I->fillField('Mod name', 'OCAP');
+        $I->click('Create mod');
+
+        $I->canSeeFormErrorMessage('directory', 'Invalid directory name.');
+    }
+
+    public function createDirectoryModAsAuthorizedUserWithoutRequiredData(FunctionalTester $I): void
+    {
+        $I->amDiscordAuthenticatedAs(RegularUserFixture::ID, function (User $user): void {
+            $user->getPermissions()->modCreate = true;
+        });
+
+        $I->amOnPage('/mod/create');
+
+        $I->selectOption('Mod source', 'Directory');
+        $I->fillField('Mod directory', '');
+        $I->fillField('Mod name', '');
+        $I->click('Create mod');
+
+        $I->canSeeFormErrorMessage('directory', 'This value should not be blank.');
+        $I->canSeeFormErrorMessage('name', 'This value should not be blank.');
+    }
+
+    public function createDirectoryModAsAuthorizedUserWithDataTooLong(FunctionalTester $I): void
+    {
+        $I->amDiscordAuthenticatedAs(RegularUserFixture::ID, function (User $user): void {
+            $user->getPermissions()->modCreate = true;
+        });
+
+        $I->amOnPage('/mod/create');
+
+        $I->selectOption('Mod source', 'Directory');
+        $I->fillField('Mod directory', '@OCAP');
+        $I->fillField('Mod name', str_repeat('a', 256));
+        $I->fillField('Mod description', str_repeat('a', 256));
+        $I->click('Create mod');
+
+        $I->canSeeFormErrorMessage('name', 'This value is too long. It should have 255 characters or less.');
+        $I->canSeeFormErrorMessage('description', 'This value is too long. It should have 255 characters or less.');
+    }
+}
diff --git a/tests/functional/Web/Mod/CreateSteamWorkshopModCest.php b/tests/functional/Web/Mod/CreateSteamWorkshopModCest.php
new file mode 100644
index 00000000..af05cae6
--- /dev/null
+++ b/tests/functional/Web/Mod/CreateSteamWorkshopModCest.php
@@ -0,0 +1,248 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Functional\Web\Mod;
+
+use App\DataFixtures\Mod\SteamWorkshop\Required\ArmaForcesMedicalModFixture;
+use App\DataFixtures\User\RegularUserFixture;
+use App\Entity\Mod\Enum\ModStatusEnum;
+use App\Entity\Mod\Enum\ModTypeEnum;
+use App\Entity\Mod\SteamWorkshopMod;
+use App\Entity\User\User;
+use App\Service\SteamApiClient\Helper\SteamHelper;
+use App\Tests\FunctionalTester;
+use Symfony\Component\HttpFoundation\Response;
+
+class CreateSteamWorkshopModCest
+{
+    public function _before(FunctionalTester $I): void
+    {
+        $I->stopFollowingRedirects();
+        $I->freezeTime('2020-01-01T00:00:00+00:00');
+    }
+
+    public function createSteamWorkshopModAsUnauthenticatedUser(FunctionalTester $I): void
+    {
+        $I->amOnPage('/mod/create');
+        $I->seeResponseRedirectsToDiscordAuth();
+    }
+
+    public function createSteamWorkshopModAsUnauthorizedUser(FunctionalTester $I): void
+    {
+        $I->amDiscordAuthenticatedAs(RegularUserFixture::ID);
+
+        $I->amOnPage('/mod/create');
+        $I->seeResponseCodeIs(Response::HTTP_FORBIDDEN);
+    }
+
+    public function createSteamWorkshopModAsAuthorizedUser(FunctionalTester $I): void
+    {
+        $user = $I->amDiscordAuthenticatedAs(RegularUserFixture::ID, function (User $user): void {
+            $user->getPermissions()->modCreate = true;
+        });
+
+        $I->amOnPage('/mod/create');
+
+        // Default form values
+        $I->seeOptionIsSelected('Mod source', 'Steam Workshop');
+        $I->seeInField('Steam Workshop URL', '');
+        $I->seeOptionIsSelected('Mod type', 'Required mod');
+        $I->dontSee('Mod status'); // Not visible
+        $I->seeInField('Mod name', '');
+        $I->seeInField('Mod description', '');
+
+        // Fill form
+        $I->selectOption('Mod source', 'Steam Workshop');
+        $I->fillField('Steam Workshop URL', 'https://steamcommunity.com/sharedfiles/filedetails/?id=1934142795');
+        $I->selectOption('Mod type', 'Optional mod');
+        $I->fillField('Mod name', 'AF Mods');
+        $I->fillField('Mod description', 'Custom Arma 3 mods');
+        $I->click('Create mod');
+
+        $I->seeResponseRedirectsTo('/mod/list');
+
+        /** @var SteamWorkshopMod $mod */
+        $mod = $I->grabEntityFromRepository(SteamWorkshopMod::class, ['itemId' => 1934142795]);
+        $I->assertSame(ModTypeEnum::OPTIONAL, $mod->getType());
+        $I->assertSame(null, $mod->getStatus());
+        $I->assertSame('AF Mods', $mod->getName());
+        $I->assertSame('Custom Arma 3 mods', $mod->getDescription());
+
+        $I->assertSame('2020-01-01T00:00:00+00:00', $mod->getCreatedAt()->format(DATE_ATOM));
+        // $I->assertSame($user, $mod->getCreatedBy()); // FIXME
+        $I->assertSame(null, $mod->getLastUpdatedAt());
+        $I->assertSame(null, $mod->getLastUpdatedBy());
+    }
+
+    public function createSteamWorkshopModAsAuthorizedUserWithNameProvidedBySteamWorkshop(FunctionalTester $I): void
+    {
+        $user = $I->amDiscordAuthenticatedAs(RegularUserFixture::ID, function (User $user): void {
+            $user->getPermissions()->modCreate = true;
+        });
+
+        $I->amOnPage('/mod/create');
+
+        // Default form values
+        $I->seeOptionIsSelected('Mod source', 'Steam Workshop');
+        $I->seeInField('Steam Workshop URL', '');
+        $I->seeOptionIsSelected('Mod type', 'Required mod');
+        $I->dontSee('Mod status'); // Not visible
+        $I->seeInField('Mod name', '');
+        $I->seeInField('Mod description', '');
+
+        // Fill form
+        $I->selectOption('Mod source', 'Steam Workshop');
+        $I->fillField('Steam Workshop URL', 'https://steamcommunity.com/sharedfiles/filedetails/?id=1934142795');
+        $I->selectOption('Mod type', 'Required mod');
+        $I->fillField('Mod name', '');
+        $I->fillField('Mod description', '');
+        $I->click('Create mod');
+
+        $I->seeResponseRedirectsTo('/mod/list');
+
+        /** @var SteamWorkshopMod $mod */
+        $mod = $I->grabEntityFromRepository(SteamWorkshopMod::class, ['itemId' => 1934142795]);
+        $I->assertSame(ModTypeEnum::REQUIRED, $mod->getType());
+        $I->assertSame(null, $mod->getStatus());
+        $I->assertSame('ArmaForces - Mods', $mod->getName()); // From Steam Workshop
+        $I->assertSame(null, $mod->getDescription());
+
+        $I->assertSame('2020-01-01T00:00:00+00:00', $mod->getCreatedAt()->format(DATE_ATOM));
+        // $I->assertSame($user, $mod->getCreatedBy()); // FIXME
+        $I->assertSame(null, $mod->getLastUpdatedAt());
+        $I->assertSame(null, $mod->getLastUpdatedBy());
+    }
+
+    public function createSteamWorkshopModAsAuthorizedUserWithChangeModStatusPermission(FunctionalTester $I): void
+    {
+        $user = $I->amDiscordAuthenticatedAs(RegularUserFixture::ID, function (User $user): void {
+            $user->getPermissions()->modCreate = true;
+            $user->getPermissions()->modChangeStatus = true;
+        });
+
+        $I->amOnPage('/mod/create');
+
+        // Default form values
+        $I->seeOptionIsSelected('Mod source', 'Steam Workshop');
+        $I->seeInField('Steam Workshop URL', '');
+        $I->seeOptionIsSelected('Mod type', 'Required mod');
+        $I->seeOptionIsSelected('Mod status', '');
+        $I->seeInField('Mod name', '');
+        $I->seeInField('Mod description', '');
+
+        // Fill form
+        $I->selectOption('Mod source', 'Steam Workshop');
+        $I->fillField('Steam Workshop URL', 'https://steamcommunity.com/sharedfiles/filedetails/?id=1934142795');
+        $I->selectOption('Mod type', 'Required mod');
+        $I->selectOption('Mod status', 'Deprecated');
+        $I->fillField('Mod name', 'AF Mods');
+        $I->fillField('Mod description', 'Custom Arma 3 mods');
+        $I->click('Create mod');
+
+        $I->seeResponseRedirectsTo('/mod/list');
+
+        /** @var SteamWorkshopMod $mod */
+        $mod = $I->grabEntityFromRepository(SteamWorkshopMod::class, ['itemId' => 1934142795]);
+        $I->assertSame(ModTypeEnum::REQUIRED, $mod->getType());
+        $I->assertSame(ModStatusEnum::DEPRECATED, $mod->getStatus());
+        $I->assertSame('AF Mods', $mod->getName());
+        $I->assertSame('Custom Arma 3 mods', $mod->getDescription());
+
+        $I->assertSame('2020-01-01T00:00:00+00:00', $mod->getCreatedAt()->format(DATE_ATOM));
+        // $I->assertSame($user, $mod->getCreatedBy()); // FIXME
+        $I->assertSame(null, $mod->getLastUpdatedAt());
+        $I->assertSame(null, $mod->getLastUpdatedBy());
+    }
+
+    public function createSteamWorkshopModAsAuthorizedUserWhenModAlreadyExists(FunctionalTester $I): void
+    {
+        $I->amDiscordAuthenticatedAs(RegularUserFixture::ID, function (User $user): void {
+            $user->getPermissions()->modCreate = true;
+        });
+
+        $I->amOnPage('/mod/create');
+
+        $url = SteamHelper::itemIdToItemUrl(ArmaForcesMedicalModFixture::ITEM_ID);
+        $I->fillField('Steam Workshop URL', $url);
+        $I->click('Create mod');
+
+        $message = sprintf('Mod associated with url "%s" already exist.', $url);
+        $I->canSeeFormErrorMessage('url', $message);
+    }
+
+    public function createSteamWorkshopModAsAuthorizedUserWithInvalidModUrl(FunctionalTester $I): void
+    {
+        $I->amDiscordAuthenticatedAs(RegularUserFixture::ID, function (User $user): void {
+            $user->getPermissions()->modCreate = true;
+        });
+
+        $I->amOnPage('/mod/create');
+
+        $I->fillField('Steam Workshop URL', 'https://example.com');
+        $I->click('Create mod');
+
+        $I->canSeeFormErrorMessage('url', 'Invalid Steam Workshop mod url.');
+    }
+
+    public function createSteamWorkshopModAsAuthorizedUserWhenModDoesNotExist(FunctionalTester $I): void
+    {
+        $I->amDiscordAuthenticatedAs(RegularUserFixture::ID, function (User $user): void {
+            $user->getPermissions()->modCreate = true;
+        });
+
+        $I->amOnPage('/mod/create');
+
+        $url = SteamHelper::itemIdToItemUrl(9999999);
+        $I->fillField('Steam Workshop URL', $url);
+        $I->click('Create mod');
+
+        $I->canSeeFormErrorMessage('url', 'Mod not found.');
+    }
+
+    public function createSteamWorkshopModAsAuthorizedUserWhenUrlIsNotAnArma3Mod(FunctionalTester $I): void
+    {
+        $I->amDiscordAuthenticatedAs(RegularUserFixture::ID, function (User $user): void {
+            $user->getPermissions()->modCreate = true;
+        });
+
+        $I->amOnPage('/mod/create');
+
+        $url = SteamHelper::itemIdToItemUrl(455312245);
+        $I->fillField('Steam Workshop URL', $url);
+        $I->click('Create mod');
+
+        $I->canSeeFormErrorMessage('url', 'Url is not an Arma 3 mod.');
+    }
+
+    public function createSteamWorkshopModAsAuthorizedUserWithoutRequiredData(FunctionalTester $I): void
+    {
+        $I->amDiscordAuthenticatedAs(RegularUserFixture::ID, function (User $user): void {
+            $user->getPermissions()->modCreate = true;
+        });
+
+        $I->amOnPage('/mod/create');
+
+        $I->fillField('Steam Workshop URL', '');
+        $I->click('Create mod');
+
+        $I->canSeeFormErrorMessage('url', 'This value should not be blank.');
+    }
+
+    public function createSteamWorkshopModAsAuthorizedUserWithDataTooLong(FunctionalTester $I): void
+    {
+        $I->amDiscordAuthenticatedAs(RegularUserFixture::ID, function (User $user): void {
+            $user->getPermissions()->modCreate = true;
+        });
+
+        $I->amOnPage('/mod/create');
+
+        $I->fillField('Steam Workshop URL', 'https://steamcommunity.com/sharedfiles/filedetails/?id=1934142795');
+        $I->fillField('Mod name', str_repeat('a', 256));
+        $I->fillField('Mod description', str_repeat('a', 256));
+        $I->click('Create mod');
+
+        $I->canSeeFormErrorMessage('name', 'This value is too long. It should have 255 characters or less.');
+        $I->canSeeFormErrorMessage('description', 'This value is too long. It should have 255 characters or less.');
+    }
+}
diff --git a/tests/functional/Web/Mod/DeleteModCest.php b/tests/functional/Web/Mod/DeleteModCest.php
new file mode 100644
index 00000000..cea784d2
--- /dev/null
+++ b/tests/functional/Web/Mod/DeleteModCest.php
@@ -0,0 +1,53 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Functional\Web\Mod;
+
+use App\DataFixtures\Mod\SteamWorkshop\Required\ArmaForcesMedicalModFixture;
+use App\DataFixtures\User\RegularUserFixture;
+use App\Entity\Mod\AbstractMod;
+use App\Entity\User\User;
+use App\Tests\FunctionalTester;
+use Symfony\Component\HttpFoundation\Response;
+
+class DeleteModCest
+{
+    public function _before(FunctionalTester $I): void
+    {
+        $I->stopFollowingRedirects();
+    }
+
+    public function deleteModAsUnauthenticatedUser(FunctionalTester $I): void
+    {
+        $id = ArmaForcesMedicalModFixture::ID;
+        $I->amOnPage(sprintf('/mod/%s/delete', $id));
+        $I->seeResponseRedirectsToDiscordAuth();
+
+        $I->seeInRepository(AbstractMod::class, ['id' => $id]);
+    }
+
+    public function deleteModAsUnauthorizedUser(FunctionalTester $I): void
+    {
+        $I->amDiscordAuthenticatedAs(RegularUserFixture::ID);
+
+        $id = ArmaForcesMedicalModFixture::ID;
+        $I->amOnPage(sprintf('/mod/%s/delete', $id));
+        $I->seeResponseCodeIs(Response::HTTP_FORBIDDEN);
+
+        $I->seeInRepository(AbstractMod::class, ['id' => $id]);
+    }
+
+    public function deleteModAsAuthorizedUser(FunctionalTester $I): void
+    {
+        $I->amDiscordAuthenticatedAs(RegularUserFixture::ID, function (User $user): void {
+            $user->getPermissions()->modDelete = true;
+        });
+
+        $id = ArmaForcesMedicalModFixture::ID;
+        $I->amOnPage(sprintf('/mod/%s/delete', $id));
+        $I->seeResponseRedirectsTo('/mod/list');
+
+        $I->dontSeeInRepository(AbstractMod::class, ['id' => $id]);
+    }
+}
diff --git a/tests/functional/Web/Mod/ListModsCest.php b/tests/functional/Web/Mod/ListModsCest.php
new file mode 100644
index 00000000..b903add7
--- /dev/null
+++ b/tests/functional/Web/Mod/ListModsCest.php
@@ -0,0 +1,90 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Functional\Web\Mod;
+
+use App\DataFixtures\User\RegularUserFixture;
+use App\Entity\User\User;
+use App\Tests\FunctionalTester;
+use Symfony\Component\HttpFoundation\Response;
+
+class ListModsCest
+{
+    public function _before(FunctionalTester $I): void
+    {
+        $I->stopFollowingRedirects();
+    }
+
+    public function listModsAsUnauthenticatedUser(FunctionalTester $I): void
+    {
+        $I->amOnPage('/mod/list');
+        $I->seeResponseRedirectsToDiscordAuth();
+    }
+
+    public function listModsAsUnauthorizedUser(FunctionalTester $I): void
+    {
+        $I->amDiscordAuthenticatedAs(RegularUserFixture::ID);
+
+        $I->amOnPage('/mod/list');
+        $I->seeResponseCodeIs(Response::HTTP_FORBIDDEN);
+    }
+
+    public function listModsAsAuthorizedUser(FunctionalTester $I): void
+    {
+        $I->amDiscordAuthenticatedAs(RegularUserFixture::ID, function (User $user): void {
+            $user->getPermissions()->modList = true;
+        });
+
+        $I->amOnPage('/mod/list');
+        $I->seeResponseCodeIs(Response::HTTP_OK);
+
+        $I->dontSeeActionButton('Create mod');
+        $I->dontSeeActionButton('Edit mod');
+    }
+
+    public function listModsAsAuthorizedUserWithCreateModPermission(FunctionalTester $I): void
+    {
+        $I->amDiscordAuthenticatedAs(RegularUserFixture::ID, function (User $user): void {
+            $user->getPermissions()->modList = true;
+            $user->getPermissions()->modCreate = true;
+        });
+
+        $I->amOnPage('/mod/list');
+        $I->seeResponseCodeIs(Response::HTTP_OK);
+
+        $I->seeLink('Create mod');
+        $I->dontSeeActionButton('Edit mod');
+        $I->dontSeeActionButton('Delete mod');
+    }
+
+    public function listModsAsAuthorizedUserWithUpdateModPermission(FunctionalTester $I): void
+    {
+        $I->amDiscordAuthenticatedAs(RegularUserFixture::ID, function (User $user): void {
+            $user->getPermissions()->modList = true;
+            $user->getPermissions()->modUpdate = true;
+        });
+
+        $I->amOnPage('/mod/list');
+        $I->seeResponseCodeIs(Response::HTTP_OK);
+
+        $I->dontSeeLink('Create mod');
+        $I->seeActionButton('Edit mod');
+        $I->dontSeeActionButton('Delete mod');
+    }
+
+    public function listModsAsAuthorizedUserWithDeleteModPermission(FunctionalTester $I): void
+    {
+        $I->amDiscordAuthenticatedAs(RegularUserFixture::ID, function (User $user): void {
+            $user->getPermissions()->modList = true;
+            $user->getPermissions()->modDelete = true;
+        });
+
+        $I->amOnPage('/mod/list');
+        $I->seeResponseCodeIs(Response::HTTP_OK);
+
+        $I->dontSeeLink('Create mod');
+        $I->dontSeeActionButton('Edit mod');
+        $I->seeActionButton('Delete mod');
+    }
+}
diff --git a/tests/functional/Web/Mod/UpdateDirectoryModCest.php b/tests/functional/Web/Mod/UpdateDirectoryModCest.php
new file mode 100644
index 00000000..974b9151
--- /dev/null
+++ b/tests/functional/Web/Mod/UpdateDirectoryModCest.php
@@ -0,0 +1,176 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Functional\Web\Mod;
+
+use App\DataFixtures\Mod\Directory\ArmaScriptProfilerModFixture;
+use App\DataFixtures\Mod\Directory\Deprecated\R3ModFixture;
+use App\DataFixtures\User\RegularUserFixture;
+use App\Entity\Mod\DirectoryMod;
+use App\Entity\Mod\Enum\ModStatusEnum;
+use App\Entity\User\User;
+use App\Tests\FunctionalTester;
+use Symfony\Component\HttpFoundation\Response;
+
+class UpdateDirectoryModCest
+{
+    public function _before(FunctionalTester $I): void
+    {
+        $I->stopFollowingRedirects();
+        $I->freezeTime('2021-01-01T00:00:00+00:00');
+    }
+
+    public function updateDirectoryModAsUnauthenticatedUser(FunctionalTester $I): void
+    {
+        $I->amOnPage(sprintf('/mod/%s/update', ArmaScriptProfilerModFixture::ID));
+        $I->seeResponseRedirectsToDiscordAuth();
+    }
+
+    public function updateDirectoryModAsUnauthorizedUser(FunctionalTester $I): void
+    {
+        $I->amDiscordAuthenticatedAs(RegularUserFixture::ID);
+
+        $I->amOnPage(sprintf('/mod/%s/update', ArmaScriptProfilerModFixture::ID));
+        $I->seeResponseCodeIs(Response::HTTP_FORBIDDEN);
+    }
+
+    public function updateDirectoryModAsAuthorizedUser(FunctionalTester $I): void
+    {
+        $user = $I->amDiscordAuthenticatedAs(RegularUserFixture::ID, function (User $user): void {
+            $user->getPermissions()->modUpdate = true;
+        });
+
+        $I->amOnPage(sprintf('/mod/%s/update', ArmaScriptProfilerModFixture::ID));
+
+        // Default form values
+        $I->seeOptionIsSelected('Mod source', 'Directory');
+        $I->seeInField('Mod directory', '@Arma Script Profiler');
+        $I->dontSee('Mod status'); // Not visible
+        $I->seeInField('Mod name', 'Arma Script Profiler');
+        $I->seeInField('Mod description', '');
+
+        // Fill form
+        $I->fillField('Mod directory', '@OCAP');
+        $I->fillField('Mod name', 'OCAP');
+        $I->fillField('Mod description', 'OCAP - AAR');
+        $I->click('Apply');
+
+        $I->seeResponseRedirectsTo('/mod/list');
+
+        /** @var DirectoryMod $mod */
+        $mod = $I->grabEntityFromRepository(DirectoryMod::class, ['directory' => '@OCAP']);
+        $I->assertSame(null, $mod->getStatus());
+        $I->assertSame('OCAP', $mod->getName());
+        $I->assertSame('OCAP - AAR', $mod->getDescription());
+
+        $I->assertSame('2020-01-01T00:00:00+00:00', $mod->getCreatedAt()->format(DATE_ATOM));
+        $I->assertSame(null, $mod->getCreatedBy());
+        // $I->assertSame('2021-01-01T00:00:00+00:00', $mod->getLastUpdatedAt()->format(DATE_ATOM)); // FIXME
+        // $I->assertSame($user, $mod->getLastUpdatedBy()); // FIXME
+    }
+
+    public function updateDirectoryModAsAuthorizedUserWithChangeModStatusPermission(FunctionalTester $I): void
+    {
+        $user = $I->amDiscordAuthenticatedAs(RegularUserFixture::ID, function (User $user): void {
+            $user->getPermissions()->modUpdate = true;
+            $user->getPermissions()->modChangeStatus = true;
+        });
+
+        $I->amOnPage(sprintf('/mod/%s/update', ArmaScriptProfilerModFixture::ID));
+
+        // Default form values
+        $I->seeOptionIsSelected('Mod source', 'Directory');
+        $I->seeInField('Mod directory', '@Arma Script Profiler');
+        $I->seeOptionIsSelected('Mod status', '');
+        $I->seeInField('Mod name', 'Arma Script Profiler');
+        $I->seeInField('Mod description', '');
+
+        // Fill form
+        $I->fillField('Mod directory', '@OCAP');
+        $I->selectOption('Mod status', 'Deprecated');
+        $I->fillField('Mod name', 'OCAP');
+        $I->fillField('Mod description', 'OCAP - AAR');
+        $I->click('Apply');
+
+        $I->seeResponseRedirectsTo('/mod/list');
+
+        /** @var DirectoryMod $mod */
+        $mod = $I->grabEntityFromRepository(DirectoryMod::class, ['directory' => '@OCAP']);
+        $I->assertSame(ModStatusEnum::DEPRECATED, $mod->getStatus());
+        $I->assertSame('OCAP', $mod->getName());
+        $I->assertSame('OCAP - AAR', $mod->getDescription());
+
+        $I->assertSame('2020-01-01T00:00:00+00:00', $mod->getCreatedAt()->format(DATE_ATOM));
+        $I->assertSame(null, $mod->getCreatedBy());
+        // $I->assertSame('2021-01-01T00:00:00+00:00', $mod->getLastUpdatedAt()->format(DATE_ATOM)); // FIXME
+        // $I->assertSame($user, $mod->getLastUpdatedBy()); // FIXME
+    }
+
+    public function updateDirectoryModAsAuthorizedUserWhenModAlreadyExists(FunctionalTester $I): void
+    {
+        $I->amDiscordAuthenticatedAs(RegularUserFixture::ID, function (User $user): void {
+            $user->getPermissions()->modUpdate = true;
+        });
+
+        $I->amOnPage(sprintf('/mod/%s/update', ArmaScriptProfilerModFixture::ID));
+
+        $I->selectOption('Mod source', 'Directory');
+        $I->fillField('Mod directory', R3ModFixture::DIRECTORY);
+        $I->fillField('Mod name', 'R3');
+        $I->click('Apply');
+
+        $I->canSeeFormErrorMessage('directory', 'Mod associated with directory "@R3" already exist.');
+    }
+
+    public function updateDirectoryModAsAuthorizedUserWithInvalidDirectoryName(FunctionalTester $I): void
+    {
+        $I->amDiscordAuthenticatedAs(RegularUserFixture::ID, function (User $user): void {
+            $user->getPermissions()->modUpdate = true;
+        });
+
+        $I->amOnPage(sprintf('/mod/%s/update', ArmaScriptProfilerModFixture::ID));
+
+        $I->selectOption('Mod source', 'Directory');
+        $I->fillField('Mod directory', '@OC/AP');
+        $I->fillField('Mod name', 'OCAP');
+        $I->click('Apply');
+
+        $I->canSeeFormErrorMessage('directory', 'Invalid directory name.');
+    }
+
+    public function updateDirectoryModAsAuthorizedUserWithoutRequiredData(FunctionalTester $I): void
+    {
+        $I->amDiscordAuthenticatedAs(RegularUserFixture::ID, function (User $user): void {
+            $user->getPermissions()->modUpdate = true;
+        });
+
+        $I->amOnPage(sprintf('/mod/%s/update', ArmaScriptProfilerModFixture::ID));
+
+        $I->selectOption('Mod source', 'Directory');
+        $I->fillField('Mod directory', '');
+        $I->fillField('Mod name', '');
+        $I->click('Apply');
+
+        $I->canSeeFormErrorMessage('directory', 'This value should not be blank.');
+        $I->canSeeFormErrorMessage('name', 'This value should not be blank.');
+    }
+
+    public function updateDirectoryModAsAuthorizedUserWithDataTooLong(FunctionalTester $I): void
+    {
+        $I->amDiscordAuthenticatedAs(RegularUserFixture::ID, function (User $user): void {
+            $user->getPermissions()->modUpdate = true;
+        });
+
+        $I->amOnPage(sprintf('/mod/%s/update', ArmaScriptProfilerModFixture::ID));
+
+        $I->selectOption('Mod source', 'Directory');
+        $I->fillField('Mod directory', '@OCAP');
+        $I->fillField('Mod name', str_repeat('a', 256));
+        $I->fillField('Mod description', str_repeat('a', 256));
+        $I->click('Apply');
+
+        $I->canSeeFormErrorMessage('name', 'This value is too long. It should have 255 characters or less.');
+        $I->canSeeFormErrorMessage('description', 'This value is too long. It should have 255 characters or less.');
+    }
+}
diff --git a/tests/functional/Web/Mod/UpdateSteamWorkshopModCest.php b/tests/functional/Web/Mod/UpdateSteamWorkshopModCest.php
new file mode 100644
index 00000000..e192299c
--- /dev/null
+++ b/tests/functional/Web/Mod/UpdateSteamWorkshopModCest.php
@@ -0,0 +1,246 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Functional\Web\Mod;
+
+use App\DataFixtures\Mod\SteamWorkshop\Required\ArmaForcesMedicalModFixture;
+use App\DataFixtures\Mod\SteamWorkshop\Required\Deprecated\LegacyArmaForcesModsModFixture;
+use App\DataFixtures\User\RegularUserFixture;
+use App\Entity\Mod\Enum\ModStatusEnum;
+use App\Entity\Mod\Enum\ModTypeEnum;
+use App\Entity\Mod\SteamWorkshopMod;
+use App\Entity\User\User;
+use App\Service\SteamApiClient\Helper\SteamHelper;
+use App\Tests\FunctionalTester;
+use Symfony\Component\HttpFoundation\Response;
+
+class UpdateSteamWorkshopModCest
+{
+    public function _before(FunctionalTester $I): void
+    {
+        $I->stopFollowingRedirects();
+        $I->freezeTime('2021-01-01T00:00:00+00:00');
+    }
+
+    public function updateSteamWorkshopModAsUnauthenticatedUser(FunctionalTester $I): void
+    {
+        $I->amOnPage(sprintf('/mod/%s/update', ArmaForcesMedicalModFixture::ID));
+        $I->seeResponseRedirectsToDiscordAuth();
+    }
+
+    public function updateSteamWorkshopModAsUnauthorizedUser(FunctionalTester $I): void
+    {
+        $I->amDiscordAuthenticatedAs(RegularUserFixture::ID);
+
+        $I->amOnPage(sprintf('/mod/%s/update', ArmaForcesMedicalModFixture::ID));
+        $I->seeResponseCodeIs(Response::HTTP_FORBIDDEN);
+    }
+
+    public function updateSteamWorkshopModAsAuthorizedUser(FunctionalTester $I): void
+    {
+        $user = $I->amDiscordAuthenticatedAs(RegularUserFixture::ID, function (User $user): void {
+            $user->getPermissions()->modUpdate = true;
+        });
+
+        $I->amOnPage(sprintf('/mod/%s/update', ArmaForcesMedicalModFixture::ID));
+
+        // Default form values
+        $I->seeOptionIsSelected('Mod source', 'Steam Workshop');
+        $I->seeInField('Steam Workshop URL', 'https://steamcommunity.com/sharedfiles/filedetails/?id=1981535406');
+        $I->seeOptionIsSelected('Mod type', 'Required mod');
+        $I->dontSee('Mod status'); // Not visible
+        $I->seeInField('Mod name', 'ArmaForces - Medical');
+        $I->seeInField('Mod description', '');
+
+        // Fill form
+        $I->fillField('Steam Workshop URL', 'https://steamcommunity.com/sharedfiles/filedetails/?id=1934142795');
+        $I->selectOption('Mod type', 'Optional mod');
+        $I->fillField('Mod name', 'AF Mods');
+        $I->fillField('Mod description', 'Custom Arma 3 mods');
+        $I->click('Apply');
+
+        $I->seeResponseRedirectsTo('/mod/list');
+
+        /** @var SteamWorkshopMod $mod */
+        $mod = $I->grabEntityFromRepository(SteamWorkshopMod::class, ['itemId' => 1934142795]);
+        $I->assertSame(ModTypeEnum::OPTIONAL, $mod->getType());
+        $I->assertSame(null, $mod->getStatus());
+        $I->assertSame('AF Mods', $mod->getName());
+        $I->assertSame('Custom Arma 3 mods', $mod->getDescription());
+
+        $I->assertSame('2020-01-01T00:00:00+00:00', $mod->getCreatedAt()->format(DATE_ATOM));
+        $I->assertSame(null, $mod->getCreatedBy());
+        // $I->assertSame('2021-01-01T00:00:00+00:00', $mod->getLastUpdatedAt()->format(DATE_ATOM)); // FIXME
+        // $I->assertSame($user, $mod->getLastUpdatedBy()); // FIXME
+    }
+
+    public function updateSteamWorkshopModAsAuthorizedUserWithNameProvidedBySteamWorkshop(FunctionalTester $I): void
+    {
+        $user = $I->amDiscordAuthenticatedAs(RegularUserFixture::ID, function (User $user): void {
+            $user->getPermissions()->modUpdate = true;
+        });
+
+        $I->amOnPage(sprintf('/mod/%s/update', ArmaForcesMedicalModFixture::ID));
+
+        // Default form values
+        $I->seeOptionIsSelected('Mod source', 'Steam Workshop');
+        $I->seeInField('Steam Workshop URL', 'https://steamcommunity.com/sharedfiles/filedetails/?id=1981535406');
+        $I->seeOptionIsSelected('Mod type', 'Required mod');
+        $I->dontSee('Mod status'); // Not visible
+        $I->seeInField('Mod name', 'ArmaForces - Medical');
+        $I->seeInField('Mod description', '');
+
+        // Fill form
+        $I->fillField('Steam Workshop URL', 'https://steamcommunity.com/sharedfiles/filedetails/?id=1934142795');
+        $I->selectOption('Mod type', 'Optional mod');
+        $I->fillField('Mod name', '');
+        $I->fillField('Mod description', '');
+        $I->click('Apply');
+
+        $I->seeResponseRedirectsTo('/mod/list');
+
+        /** @var SteamWorkshopMod $mod */
+        $mod = $I->grabEntityFromRepository(SteamWorkshopMod::class, ['itemId' => 1934142795]);
+        $I->assertSame(ModTypeEnum::OPTIONAL, $mod->getType());
+        $I->assertSame(null, $mod->getStatus());
+        $I->assertSame('ArmaForces - Mods', $mod->getName()); // From Steam Workshop
+        $I->assertSame(null, $mod->getDescription());
+
+        $I->assertSame('2020-01-01T00:00:00+00:00', $mod->getCreatedAt()->format(DATE_ATOM));
+        $I->assertSame(null, $mod->getCreatedBy());
+        // $I->assertSame('2021-01-01T00:00:00+00:00', $mod->getLastUpdatedAt()->format(DATE_ATOM)); // FIXME
+        // $I->assertSame($user, $mod->getLastUpdatedBy()); // FIXME
+    }
+
+    public function updateSteamWorkshopModAsAuthorizedUserWithChangeModStatusPermission(FunctionalTester $I): void
+    {
+        $user = $I->amDiscordAuthenticatedAs(RegularUserFixture::ID, function (User $user): void {
+            $user->getPermissions()->modUpdate = true;
+            $user->getPermissions()->modChangeStatus = true;
+        });
+
+        $I->amOnPage(sprintf('/mod/%s/update', ArmaForcesMedicalModFixture::ID));
+
+        // Default form values
+        $I->seeOptionIsSelected('Mod source', 'Steam Workshop');
+        $I->seeInField('Steam Workshop URL', 'https://steamcommunity.com/sharedfiles/filedetails/?id=1981535406');
+        $I->seeOptionIsSelected('Mod type', 'Required mod');
+        $I->seeOptionIsSelected('Mod status', '');
+        $I->seeInField('Mod name', 'ArmaForces - Medical');
+        $I->seeInField('Mod description', '');
+
+        // Fill form
+        $I->fillField('Steam Workshop URL', 'https://steamcommunity.com/sharedfiles/filedetails/?id=1934142795');
+        $I->selectOption('Mod type', 'Optional mod');
+        $I->selectOption('Mod status', 'Deprecated');
+        $I->fillField('Mod name', 'AF Mods');
+        $I->fillField('Mod description', 'Custom Arma 3 mods');
+        $I->click('Apply');
+
+        $I->seeResponseRedirectsTo('/mod/list');
+
+        /** @var SteamWorkshopMod $mod */
+        $mod = $I->grabEntityFromRepository(SteamWorkshopMod::class, ['itemId' => 1934142795]);
+        $I->assertSame(ModTypeEnum::OPTIONAL, $mod->getType());
+        $I->assertSame(ModStatusEnum::DEPRECATED, $mod->getStatus());
+        $I->assertSame('AF Mods', $mod->getName());
+        $I->assertSame('Custom Arma 3 mods', $mod->getDescription());
+
+        $I->assertSame('2020-01-01T00:00:00+00:00', $mod->getCreatedAt()->format(DATE_ATOM));
+        $I->assertSame(null, $mod->getCreatedBy());
+        // $I->assertSame('2021-01-01T00:00:00+00:00', $mod->getLastUpdatedAt()->format(DATE_ATOM)); // FIXME
+        // $I->assertSame($user, $mod->getLastUpdatedBy()); // FIXME
+    }
+
+    public function updateSteamWorkshopModAsAuthorizedUserWhenModDoesNotExist(FunctionalTester $I): void
+    {
+        $I->amDiscordAuthenticatedAs(RegularUserFixture::ID, function (User $user): void {
+            $user->getPermissions()->modUpdate = true;
+        });
+
+        $I->amOnPage(sprintf('/mod/%s/update', ArmaForcesMedicalModFixture::ID));
+
+        $url = SteamHelper::itemIdToItemUrl(9999999);
+        $I->fillField('Steam Workshop URL', $url);
+        $I->click('Apply');
+
+        $I->canSeeFormErrorMessage('url', 'Mod not found.');
+    }
+
+    public function updateSteamWorkshopModAsAuthorizedUserWithInvalidModUrl(FunctionalTester $I): void
+    {
+        $I->amDiscordAuthenticatedAs(RegularUserFixture::ID, function (User $user): void {
+            $user->getPermissions()->modUpdate = true;
+        });
+
+        $I->amOnPage(sprintf('/mod/%s/update', ArmaForcesMedicalModFixture::ID));
+
+        $I->fillField('Steam Workshop URL', 'https://example.com');
+        $I->click('Apply');
+
+        $I->canSeeFormErrorMessage('url', 'Invalid Steam Workshop mod url.');
+    }
+
+    public function updateSteamWorkshopModAsAuthorizedUserWhenModAlreadyExists(FunctionalTester $I): void
+    {
+        $I->amDiscordAuthenticatedAs(RegularUserFixture::ID, function (User $user): void {
+            $user->getPermissions()->modUpdate = true;
+        });
+
+        $I->amOnPage(sprintf('/mod/%s/update', LegacyArmaForcesModsModFixture::ID));
+
+        $url = SteamHelper::itemIdToItemUrl(ArmaForcesMedicalModFixture::ITEM_ID);
+        $I->fillField('Steam Workshop URL', $url);
+        $I->click('Apply');
+
+        $message = sprintf('Mod associated with url "%s" already exist.', $url);
+        $I->canSeeFormErrorMessage('url', $message);
+    }
+
+    public function updateSteamWorkshopModAsAuthorizedUserWhenUrlIsNotAnArma3Mod(FunctionalTester $I): void
+    {
+        $I->amDiscordAuthenticatedAs(RegularUserFixture::ID, function (User $user): void {
+            $user->getPermissions()->modUpdate = true;
+        });
+
+        $I->amOnPage(sprintf('/mod/%s/update', ArmaForcesMedicalModFixture::ID));
+
+        $url = SteamHelper::itemIdToItemUrl(455312245);
+        $I->fillField('Steam Workshop URL', $url);
+        $I->click('Apply');
+
+        $I->canSeeFormErrorMessage('url', 'Url is not an Arma 3 mod.');
+    }
+
+    public function updateSteamWorkshopModAsAuthorizedUserWithoutRequiredData(FunctionalTester $I): void
+    {
+        $I->amDiscordAuthenticatedAs(RegularUserFixture::ID, function (User $user): void {
+            $user->getPermissions()->modUpdate = true;
+        });
+
+        $I->amOnPage(sprintf('/mod/%s/update', ArmaForcesMedicalModFixture::ID));
+
+        $I->fillField('Steam Workshop URL', '');
+        $I->click('Apply');
+
+        $I->canSeeFormErrorMessage('url', 'This value should not be blank.');
+    }
+
+    public function updateSteamWorkshopModAsAuthorizedUserWithDataTooLong(FunctionalTester $I): void
+    {
+        $I->amDiscordAuthenticatedAs(RegularUserFixture::ID, function (User $user): void {
+            $user->getPermissions()->modUpdate = true;
+        });
+
+        $I->amOnPage(sprintf('/mod/%s/update', ArmaForcesMedicalModFixture::ID));
+
+        $I->fillField('Steam Workshop URL', 'https://steamcommunity.com/sharedfiles/filedetails/?id=1934142795');
+        $I->fillField('Mod name', str_repeat('a', 256));
+        $I->fillField('Mod description', str_repeat('a', 256));
+        $I->click('Apply');
+
+        $I->canSeeFormErrorMessage('name', 'This value is too long. It should have 255 characters or less.');
+        $I->canSeeFormErrorMessage('description', 'This value is too long. It should have 255 characters or less.');
+    }
+}