diff --git a/.gitignore b/.gitignore
index 6d5aba94..58efde94 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,7 +4,7 @@
 /.phpunit.cache
 /vendor/
 /bin/tools/*/vendor/
-/bin/tools/php-cs-fixer/composer.lock
+/bin/tools/csfixer
 /build/
 /.php-cs-fixer.cache
 /.phpunit.result.cache
diff --git a/.php-cs-fixer.dist.php b/.php-cs-fixer.dist.php
index 5fca00a6..12b58602 100644
--- a/.php-cs-fixer.dist.php
+++ b/.php-cs-fixer.dist.php
@@ -7,6 +7,12 @@
     \file_get_contents('https://raw.githubusercontent.com/zenstruck/.github/main/.php-cs-fixer.dist.php')
 );
 
+$finder = PhpCsFixer\Finder::create()
+    ->in([__DIR__.'/src', __DIR__.'/tests'])
+    ->notName('KernelTestCaseWithOnlyResetDatabaseTraitTest.php')
+    ->notName('KernelTestCaseWithBothTraitsInWrongOrderTest.php')
+;
+
 try {
     return require $file;
 } finally {
diff --git a/phpunit-10.xml.dist b/phpunit-10.xml.dist
index b9758154..2ec36faf 100644
--- a/phpunit-10.xml.dist
+++ b/phpunit-10.xml.dist
@@ -18,6 +18,7 @@
         <testsuite name="main">
             <directory>tests</directory>
             <exclude>tests/Integration/Migration/ResetDatabaseWithMigrationTest.php</exclude>
+            <exclude>tests/Fixture</exclude>
         </testsuite>
         <testsuite name="migrate">
             <file>tests/Integration/Migration/ResetDatabaseWithMigrationTest.php</file>
diff --git a/phpunit-paratest.xml.dist b/phpunit-paratest.xml.dist
index 387352e8..33027af9 100644
--- a/phpunit-paratest.xml.dist
+++ b/phpunit-paratest.xml.dist
@@ -17,6 +17,7 @@
         <testsuite name="main">
             <directory>tests</directory>
             <exclude>tests/Integration/Migration/ResetDatabaseWithMigrationTest.php</exclude>
+            <exclude>tests/Fixture</exclude>
         </testsuite>
     </testsuites>
     <source ignoreSuppressionOfDeprecations="true">
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index c6b9f26c..bee2840a 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -20,6 +20,7 @@
         <testsuite name="main">
             <directory>tests</directory>
             <exclude>tests/Integration/Migration/ResetDatabaseWithMigrationTest.php</exclude>
+            <exclude>tests/Fixture</exclude>
         </testsuite>
         <testsuite name="migrate">
             <file>tests/Integration/Migration/ResetDatabaseWithMigrationTest.php</file>
diff --git a/src/Configuration.php b/src/Configuration.php
index 1dae202a..3ac9ddc8 100644
--- a/src/Configuration.php
+++ b/src/Configuration.php
@@ -12,10 +12,12 @@
 namespace Zenstruck\Foundry;
 
 use Faker;
+use Symfony\Bundle\FrameworkBundle\Test\KernelTestCase;
 use Zenstruck\Foundry\Exception\FoundryNotBooted;
 use Zenstruck\Foundry\Exception\PersistenceDisabled;
 use Zenstruck\Foundry\Exception\PersistenceNotAvailable;
 use Zenstruck\Foundry\Persistence\PersistenceManager;
+use Zenstruck\Foundry\Test\Factories;
 
 /**
  * @author Kevin Bond <kevinbond@gmail.com>
@@ -96,6 +98,8 @@ public static function isBooted(): bool
     /** @param \Closure():self|self $configuration */
     public static function boot(\Closure|self $configuration): void
     {
+        self::throwIfComingFromKernelTestCaseWithoutFactoriesTrait();
+
         self::$instance = $configuration;
     }
 
@@ -111,4 +115,20 @@ public static function shutdown(): void
         StoryRegistry::reset();
         self::$instance = null;
     }
+
+    private static function throwIfComingFromKernelTestCaseWithoutFactoriesTrait(): void
+    {
+        $backTrace = \debug_backtrace(\DEBUG_BACKTRACE_IGNORE_ARGS); // @phpstan-ignore ekinoBannedCode.function
+
+        foreach ($backTrace as $trace) {
+            if (
+                isset($trace['class'])
+                && KernelTestCase::class !== $trace['class']
+                && \is_a($trace['class'], KernelTestCase::class, true)
+                && !(new \ReflectionClass($trace['class']))->hasMethod('_bootFoundry')
+            ) {
+                throw new \LogicException(\sprintf('You must use the trait "%s" in "%s" in order to use Foundry.', Factories::class, $trace['class']));
+            }
+        }
+    }
 }
diff --git a/tests/Fixture/ForceFactoriesTraitUsage/KernelTestCaseWithOnlyResetDatabaseTraitTest.php b/tests/Fixture/ForceFactoriesTraitUsage/KernelTestCaseWithOnlyResetDatabaseTraitTest.php
new file mode 100644
index 00000000..1cd1b3d7
--- /dev/null
+++ b/tests/Fixture/ForceFactoriesTraitUsage/KernelTestCaseWithOnlyResetDatabaseTraitTest.php
@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the zenstruck/foundry package.
+ *
+ * (c) Kevin Bond <kevinbond@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Zenstruck\Foundry\Tests\Fixture\ForceFactoriesTraitUsage;
+
+use Symfony\Bundle\FrameworkBundle\Test\KernelTestCase;
+use Zenstruck\Foundry\Test\ResetDatabase;
+
+final class KernelTestCaseWithOnlyResetDatabaseTraitTest extends KernelTestCase
+{
+    use ResetDatabase;
+
+    public function test_using_foundry_without_trait_should_throw(): void
+    {
+    }
+}
diff --git a/tests/Integration/ForceFactoriesTraitUsage/KernelTestCaseWithBothTraitsInWrongOrderTest.php b/tests/Integration/ForceFactoriesTraitUsage/KernelTestCaseWithBothTraitsInWrongOrderTest.php
new file mode 100644
index 00000000..6ac322d8
--- /dev/null
+++ b/tests/Integration/ForceFactoriesTraitUsage/KernelTestCaseWithBothTraitsInWrongOrderTest.php
@@ -0,0 +1,46 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the zenstruck/foundry package.
+ *
+ * (c) Kevin Bond <kevinbond@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Zenstruck\Foundry\Tests\Integration\ForceFactoriesTraitUsage;
+
+use Symfony\Bundle\FrameworkBundle\Test\KernelTestCase;
+use Zenstruck\Foundry\Test\Factories;
+use Zenstruck\Foundry\Test\ResetDatabase;
+use Zenstruck\Foundry\Tests\Fixture\Factories\Object1Factory;
+
+final class KernelTestCaseWithBothTraitsInWrongOrderTest extends KernelTestCase
+{
+    use ResetDatabase, Factories;
+
+    /**
+     * @test
+     */
+    public function should_not_throw(): void
+    {
+        Object1Factory::createOne();
+
+        $this->expectNotToPerformAssertions();
+    }
+
+    /**
+     * @test
+     */
+    public function should_not_throw_even_when_kernel_is_booted(): void
+    {
+        self::getContainer();
+
+        Object1Factory::createOne();
+
+        $this->expectNotToPerformAssertions();
+    }
+}
diff --git a/tests/Integration/ForceFactoriesTraitUsage/KernelTestCaseWithBothTraitsTest.php b/tests/Integration/ForceFactoriesTraitUsage/KernelTestCaseWithBothTraitsTest.php
new file mode 100644
index 00000000..9324d38b
--- /dev/null
+++ b/tests/Integration/ForceFactoriesTraitUsage/KernelTestCaseWithBothTraitsTest.php
@@ -0,0 +1,46 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the zenstruck/foundry package.
+ *
+ * (c) Kevin Bond <kevinbond@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Zenstruck\Foundry\Tests\Integration\ForceFactoriesTraitUsage;
+
+use Symfony\Bundle\FrameworkBundle\Test\KernelTestCase;
+use Zenstruck\Foundry\Test\Factories;
+use Zenstruck\Foundry\Test\ResetDatabase;
+use Zenstruck\Foundry\Tests\Fixture\Factories\Object1Factory;
+
+final class KernelTestCaseWithBothTraitsTest extends KernelTestCase
+{
+    use Factories, ResetDatabase;
+
+    /**
+     * @test
+     */
+    public function should_not_throw(): void
+    {
+        Object1Factory::createOne();
+
+        $this->expectNotToPerformAssertions();
+    }
+
+    /**
+     * @test
+     */
+    public function should_not_throw_even_when_kernel_is_booted(): void
+    {
+        self::getContainer();
+
+        Object1Factory::createOne();
+
+        $this->expectNotToPerformAssertions();
+    }
+}
diff --git a/tests/Integration/ForceFactoriesTraitUsage/KernelTestCaseWithFactoriesTraitTest.php b/tests/Integration/ForceFactoriesTraitUsage/KernelTestCaseWithFactoriesTraitTest.php
new file mode 100644
index 00000000..9d7f90d5
--- /dev/null
+++ b/tests/Integration/ForceFactoriesTraitUsage/KernelTestCaseWithFactoriesTraitTest.php
@@ -0,0 +1,45 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the zenstruck/foundry package.
+ *
+ * (c) Kevin Bond <kevinbond@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Zenstruck\Foundry\Tests\Integration\ForceFactoriesTraitUsage;
+
+use Symfony\Bundle\FrameworkBundle\Test\KernelTestCase;
+use Zenstruck\Foundry\Test\Factories;
+use Zenstruck\Foundry\Tests\Fixture\Factories\Object1Factory;
+
+final class KernelTestCaseWithFactoriesTraitTest extends KernelTestCase
+{
+    use Factories;
+
+    /**
+     * @test
+     */
+    public function should_not_throw(): void
+    {
+        Object1Factory::createOne();
+
+        $this->expectNotToPerformAssertions();
+    }
+
+    /**
+     * @test
+     */
+    public function should_not_throw_even_when_kernel_is_booted(): void
+    {
+        self::getContainer();
+
+        Object1Factory::createOne();
+
+        $this->expectNotToPerformAssertions();
+    }
+}
diff --git a/tests/Integration/ForceFactoriesTraitUsage/KernelTestCaseWithoutFactoriesTraitTest.php b/tests/Integration/ForceFactoriesTraitUsage/KernelTestCaseWithoutFactoriesTraitTest.php
new file mode 100644
index 00000000..829f80a1
--- /dev/null
+++ b/tests/Integration/ForceFactoriesTraitUsage/KernelTestCaseWithoutFactoriesTraitTest.php
@@ -0,0 +1,44 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the zenstruck/foundry package.
+ *
+ * (c) Kevin Bond <kevinbond@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Zenstruck\Foundry\Tests\Integration\ForceFactoriesTraitUsage;
+
+use Symfony\Bundle\FrameworkBundle\Test\KernelTestCase;
+use Zenstruck\Foundry\Exception\FoundryNotBooted;
+use Zenstruck\Foundry\Tests\Fixture\Factories\Object1Factory;
+
+final class KernelTestCaseWithoutFactoriesTraitTest extends KernelTestCase
+{
+    /**
+     * @test
+     */
+    public function using_foundry_without_trait_should_throw(): void
+    {
+        $this->expectException(FoundryNotBooted::class);
+
+        Object1Factory::createOne();
+    }
+
+    /**
+     * @test
+     */
+    public function using_foundry_without_trait_should_throw_even_when_kernel_is_booted(): void
+    {
+        $this->expectException(\LogicException::class);
+        $this->expectExceptionMessage('You must use the trait "Zenstruck\Foundry\Test\Factories"');
+
+        self::getContainer();
+
+        Object1Factory::createOne();
+    }
+}
diff --git a/tests/Integration/ForceFactoriesTraitUsage/UnitTestCaseWithFactoriesTraitTest.php b/tests/Integration/ForceFactoriesTraitUsage/UnitTestCaseWithFactoriesTraitTest.php
new file mode 100644
index 00000000..34077b9d
--- /dev/null
+++ b/tests/Integration/ForceFactoriesTraitUsage/UnitTestCaseWithFactoriesTraitTest.php
@@ -0,0 +1,33 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the zenstruck/foundry package.
+ *
+ * (c) Kevin Bond <kevinbond@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Zenstruck\Foundry\Tests\Integration\ForceFactoriesTraitUsage;
+
+use PHPUnit\Framework\TestCase;
+use Zenstruck\Foundry\Test\Factories;
+use Zenstruck\Foundry\Tests\Fixture\Factories\Object1Factory;
+
+final class UnitTestCaseWithFactoriesTraitTest extends TestCase
+{
+    use Factories;
+
+    /**
+     * @test
+     */
+    public function should_not_throw(): void
+    {
+        Object1Factory::createOne();
+
+        $this->expectNotToPerformAssertions();
+    }
+}
diff --git a/tests/Integration/ForceFactoriesTraitUsage/UnitTestCaseWithoutFactoriesTraitTest.php b/tests/Integration/ForceFactoriesTraitUsage/UnitTestCaseWithoutFactoriesTraitTest.php
new file mode 100644
index 00000000..76bd41b7
--- /dev/null
+++ b/tests/Integration/ForceFactoriesTraitUsage/UnitTestCaseWithoutFactoriesTraitTest.php
@@ -0,0 +1,31 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the zenstruck/foundry package.
+ *
+ * (c) Kevin Bond <kevinbond@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Zenstruck\Foundry\Tests\Integration\ForceFactoriesTraitUsage;
+
+use PHPUnit\Framework\TestCase;
+use Zenstruck\Foundry\Exception\FoundryNotBooted;
+use Zenstruck\Foundry\Tests\Fixture\Factories\Object1Factory;
+
+final class UnitTestCaseWithoutFactoriesTraitTest extends TestCase
+{
+    /**
+     * @test
+     */
+    public function should_throw(): void
+    {
+        $this->expectException(FoundryNotBooted::class);
+
+        Object1Factory::createOne();
+    }
+}
diff --git a/tests/Integration/ForceFactoriesTraitUsage/kernel_test_case_with_only_reset_database_trait.phpt b/tests/Integration/ForceFactoriesTraitUsage/kernel_test_case_with_only_reset_database_trait.phpt
new file mode 100644
index 00000000..51327f0b
--- /dev/null
+++ b/tests/Integration/ForceFactoriesTraitUsage/kernel_test_case_with_only_reset_database_trait.phpt
@@ -0,0 +1,38 @@
+--TEST--
+phpunit --version
+--FILE--
+<?php
+$_ENV['KERNEL_CLASS'] = 'Zenstruck\Foundry\Tests\Fixture\TestKernel';
+$_SERVER['argv'][] = '--do-not-cache-result';
+$_SERVER['argv'][] = '--no-configuration';
+$_SERVER['argv'][] = __DIR__ . '/../../Fixture/ForceFactoriesTraitUsage/KernelTestCaseWithOnlyResetDatabaseTraitTest.php';
+
+require __DIR__ . '/../../bootstrap.php';
+
+(new PHPUnit\TextUI\Application)->run($_SERVER['argv']);
+?>
+--EXPECTF--
+PHPUnit %s by Sebastian Bergmann and contributors.
+
+Runtime:       PHP %s
+
+E                                                                   1 / 1 (100%)
+
+Time: %s, Memory: %s MB
+
+There was 1 error:
+
+1) Zenstruck\Foundry\Tests\Fixture\ForceFactoriesTraitUsage\KernelTestCaseWithOnlyResetDatabaseTraitTest
+LogicException: You must use the trait "Zenstruck\Foundry\Test\Factories" in "Zenstruck\Foundry\Tests\Fixture\ForceFactoriesTraitUsage\KernelTestCaseWithOnlyResetDatabaseTraitTest" in order to use Foundry.
+
+%s/src/Configuration.php:%d
+%s/src/Configuration.php:%d
+%s/src/ZenstruckFoundryBundle.php:%d
+%s/vendor/symfony/http-kernel/Kernel.php:%d
+%s/vendor/symfony/framework-bundle/Test/KernelTestCase.php:%d
+%s/src/Test/ResetDatabase.php:%d
+%s/src/Persistence/ResetDatabase/ResetDatabaseManager.php:%d
+%s/src/Test/ResetDatabase.php:%d
+
+ERRORS!
+Tests: 1, Assertions: 0, Errors: 1.
diff --git a/tests/Integration/Maker/MakerTestCase.php b/tests/Integration/Maker/MakerTestCase.php
index 1e830d3d..2984dd64 100644
--- a/tests/Integration/Maker/MakerTestCase.php
+++ b/tests/Integration/Maker/MakerTestCase.php
@@ -14,6 +14,7 @@
 use Symfony\Bundle\FrameworkBundle\Test\KernelTestCase;
 use Symfony\Component\Filesystem\Filesystem;
 use Symfony\Component\String\Slugger\AsciiSlugger;
+use Zenstruck\Foundry\Test\Factories;
 
 /**
  * @author Kevin Bond <kevinbond@gmail.com>
@@ -21,6 +22,8 @@
  */
 abstract class MakerTestCase extends KernelTestCase
 {
+    use Factories;
+
     /**
      * @before
      */