diff --git a/README.md b/README.md
index 5e4f01e..adeded3 100644
--- a/README.md
+++ b/README.md
@@ -10,9 +10,14 @@ Casos você queira se aprofundar no tema, não deixe  de conheceu o site Growth
 ## Organização do Projeto:
 
 - `src/`
+    - `Behavioral/`
+    - `Creational/`
+    - `Structural/`    
+- `tests/`
     - `Behavioral/`
     - `Creational/`
     - `Structural/`
+    
 
 A estrutura da pastas de `tests/` segue a mesma estrutura
 
@@ -36,7 +41,9 @@ Este projetos tem um arquivo `Makefile` para a execução dos testes
 
     `make test`
 
+5. Para executar os testes de uma classe especídica:
 
+    `make test NomeDaClass`
 ## Sobre nós
 
 Este projeto foi desenvoldido por Walmir Silva autor do blog [https://growthdev.com.br](https://growthdev.com.br/)
diff --git a/src/Behavioral/Strategy/Payment/CashPaymentMethod.php b/src/Behavioral/Strategy/Payment/CashPaymentMethod.php
new file mode 100644
index 0000000..7c3575f
--- /dev/null
+++ b/src/Behavioral/Strategy/Payment/CashPaymentMethod.php
@@ -0,0 +1,15 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Growthdev\DesignPatterns\Behavioral\Strategy\Payment;
+
+class CashPaymentMethod implements PaymentMethodStrategy
+{
+    private const DISCOUNT_PERCENT = 0.10; // 10%
+
+    public function pay(float $amount): float
+    {
+        return $amount - ($amount * self::DISCOUNT_PERCENT);
+    }
+}
diff --git a/src/Behavioral/Strategy/Payment/CreditCardPaymentMethod.php b/src/Behavioral/Strategy/Payment/CreditCardPaymentMethod.php
new file mode 100644
index 0000000..ce7a16a
--- /dev/null
+++ b/src/Behavioral/Strategy/Payment/CreditCardPaymentMethod.php
@@ -0,0 +1,15 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Growthdev\DesignPatterns\Behavioral\Strategy\Payment;
+
+class CreditCardPaymentMethod implements PaymentMethodStrategy
+{
+    private const DISCOUNT_PERCENT = 0.00; // 0%
+
+    public function pay(float $amount): float
+    {
+        return $amount - ($amount * self::DISCOUNT_PERCENT);
+    }
+}
diff --git a/src/Behavioral/Strategy/Payment/DebitCardPaymentMethod.php b/src/Behavioral/Strategy/Payment/DebitCardPaymentMethod.php
new file mode 100644
index 0000000..884b2c0
--- /dev/null
+++ b/src/Behavioral/Strategy/Payment/DebitCardPaymentMethod.php
@@ -0,0 +1,15 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Growthdev\DesignPatterns\Behavioral\Strategy\Payment;
+
+class DebitCardPaymentMethod implements PaymentMethodStrategy
+{
+    private const DISCOUNT_PERCENT = 0.05;  // 5%
+
+    public function pay(float $amount): float
+    {
+        return $amount - ($amount * self::DISCOUNT_PERCENT);
+    }
+}
diff --git a/src/Behavioral/Strategy/Payment/PaymentMethodStrategy.php b/src/Behavioral/Strategy/Payment/PaymentMethodStrategy.php
new file mode 100644
index 0000000..c42edef
--- /dev/null
+++ b/src/Behavioral/Strategy/Payment/PaymentMethodStrategy.php
@@ -0,0 +1,10 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Growthdev\DesignPatterns\Behavioral\Strategy\Payment;
+
+interface PaymentMethodStrategy
+{
+    public function pay(float $amount): float;
+}
\ No newline at end of file
diff --git a/src/Behavioral/Strategy/Payment/PaymentProcessor.php b/src/Behavioral/Strategy/Payment/PaymentProcessor.php
new file mode 100644
index 0000000..9332c69
--- /dev/null
+++ b/src/Behavioral/Strategy/Payment/PaymentProcessor.php
@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Growthdev\DesignPatterns\Behavioral\Strategy\Payment;
+
+final class PaymentProcessor
+{
+    private PaymentMethodStrategy $paymentMethod;
+    private float $amount;
+
+    public function __construct(PaymentMethodStrategy $paymentMethod)
+    {
+        $this->paymentMethod = $paymentMethod;
+    }
+
+    public function processPayment(float $amount): void
+    {
+        $this->amount = $this->paymentMethod->pay($amount);
+    }
+
+    public function getAmount(): float
+    {
+        return $this->amount;
+    }
+}
diff --git a/src/Behavioral/Strategy/Payment/PaymentProcessorWithoutStrategy.php b/src/Behavioral/Strategy/Payment/PaymentProcessorWithoutStrategy.php
new file mode 100644
index 0000000..1c2b54c
--- /dev/null
+++ b/src/Behavioral/Strategy/Payment/PaymentProcessorWithoutStrategy.php
@@ -0,0 +1,45 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Growthdev\DesignPatterns\Behavioral\Strategy\Payment;
+
+final class PaymentProcessorWithoutStrategy
+{
+    public const PAYMENT_TYPE_CREDIT_CARD = 'credit_card';
+    public const PAYMENT_TYPE_DEBIT_CARD = 'debit_card';
+    public const PAYMENT_TYPE_CASH = 'by_cash';
+
+    private string $paymentMethod;
+    private float $amount;
+
+    public function __construct(string $paymentMethod)
+    {
+        $this->paymentMethod = $paymentMethod;
+    }
+
+    public function processPayment(float $amount): void
+    {
+        switch ($this->paymentMethod) {
+            case self::PAYMENT_TYPE_CREDIT_CARD:
+                $creditCard = new CreditCardPaymentMethod();
+                $this->amount = $creditCard->pay($amount);
+                break;
+            case self::PAYMENT_TYPE_DEBIT_CARD:
+                $debitCard = new DebitCardPaymentMethod();
+                $this->amount = $debitCard->pay($amount);
+                break;
+            case self::PAYMENT_TYPE_CASH:
+                $cash = new CashPaymentMethod();
+                $this->amount = $cash->pay($amount);
+                break;
+            default:
+                throw new \InvalidArgumentException('Invalid payment method');
+        }
+    }
+
+    public function getAmount(): float
+    {
+        return $this->amount;
+    }
+}
diff --git a/src/Behavioral/Strategy/WithMethodFactory/AcousticGuitarStrategy.php b/src/Behavioral/Strategy/WithMethodFactory/AcousticGuitarStrategy.php
new file mode 100644
index 0000000..07005bd
--- /dev/null
+++ b/src/Behavioral/Strategy/WithMethodFactory/AcousticGuitarStrategy.php
@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Growthdev\DesignPatterns\Behavioral\Strategy\WithMethodFactory;
+
+use Growthdev\DesignPatterns\Behavioral\Strategy\WithMethodFactory\MusicalInstrumentStrategy;
+use Growthdev\DesignPatterns\Creational\FactoryMethod\Factory\AcousticGuitarFactory;
+use Growthdev\DesignPatterns\Creational\FactoryMethod\Product\AcousticGuitar;
+use Growthdev\DesignPatterns\Creational\FactoryMethod\Product\MusicalInstrument;
+
+class AcousticGuitarStrategy implements MusicalInstrumentStrategy
+{
+    private string $brand;
+
+    public function __construct(string $brand)
+    {
+        $this->brand = $brand;
+    }
+
+    public function build(): MusicalInstrument
+    {
+        return (new AcousticGuitarFactory())
+            ->createMusicalInstrument($this->brand);
+    }
+}
diff --git a/src/Behavioral/Strategy/WithMethodFactory/ElectricGuitarStrategy.php b/src/Behavioral/Strategy/WithMethodFactory/ElectricGuitarStrategy.php
new file mode 100644
index 0000000..c0f2c63
--- /dev/null
+++ b/src/Behavioral/Strategy/WithMethodFactory/ElectricGuitarStrategy.php
@@ -0,0 +1,25 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Growthdev\DesignPatterns\Behavioral\Strategy\WithMethodFactory;
+
+use Growthdev\DesignPatterns\Behavioral\Strategy\WithMethodFactory\MusicalInstrumentStrategy;
+use Growthdev\DesignPatterns\Creational\FactoryMethod\Factory\ElectricGuitarFactory;
+use Growthdev\DesignPatterns\Creational\FactoryMethod\Product\MusicalInstrument;
+
+class ElectricGuitarStrategy implements MusicalInstrumentStrategy
+{
+    private string $brand;
+
+    public function __construct(string $brand)
+    {
+        $this->brand = $brand;
+    }
+
+    public function build(): MusicalInstrument
+    {
+        return (new ElectricGuitarFactory())
+            ->createMusicalInstrument($this->brand);
+    }
+}
diff --git a/src/Behavioral/Strategy/WithMethodFactory/MusicalInstrumentFactory.php b/src/Behavioral/Strategy/WithMethodFactory/MusicalInstrumentFactory.php
new file mode 100644
index 0000000..b5920fc
--- /dev/null
+++ b/src/Behavioral/Strategy/WithMethodFactory/MusicalInstrumentFactory.php
@@ -0,0 +1,19 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Growthdev\DesignPatterns\Behavioral\Strategy\WithMethodFactory;
+
+use Growthdev\DesignPatterns\Creational\FactoryMethod\Product\MusicalInstrument;
+
+class MusicalInstrumentFactory
+{
+    public function createMusicalInstrument(
+        MusicalInstrumentStrategy $musicalInstrument
+    ): MusicalInstrument {
+        return $musicalInstrument->build();
+    }
+}
+
+
+
diff --git a/src/Behavioral/Strategy/WithMethodFactory/MusicalInstrumentStrategy.php b/src/Behavioral/Strategy/WithMethodFactory/MusicalInstrumentStrategy.php
new file mode 100644
index 0000000..72955af
--- /dev/null
+++ b/src/Behavioral/Strategy/WithMethodFactory/MusicalInstrumentStrategy.php
@@ -0,0 +1,12 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Growthdev\DesignPatterns\Behavioral\Strategy\WithMethodFactory;
+
+use Growthdev\DesignPatterns\Creational\FactoryMethod\Product\MusicalInstrument;
+
+interface MusicalInstrumentStrategy
+{
+    public function build(): MusicalInstrument;
+}
\ No newline at end of file
diff --git a/src/Creational/FactoryMethod/MusicalInstrumentFactory.php b/src/Creational/FactoryMethod/MusicalInstrumentFactory.php
index 9ce1075..5bd21e6 100644
--- a/src/Creational/FactoryMethod/MusicalInstrumentFactory.php
+++ b/src/Creational/FactoryMethod/MusicalInstrumentFactory.php
@@ -17,9 +17,11 @@ public function createMusicalInstrument(string $type, string $brand): MusicalIns
     {
         switch ($type) {
             case self::ACOUSTIC_GUITAR:
-                return (new AcousticGuitarFactory())->createMusicalInstrument($brand);
+                return (new AcousticGuitarFactory())
+                    ->createMusicalInstrument($brand);
             case self::ELECTRIC_GUITAR:
-                return (new ElectricGuitarFactory())->createMusicalInstrument($brand);
+                return (new ElectricGuitarFactory())
+                    ->createMusicalInstrument($brand);
             default:
                 throw new \InvalidArgumentException('Invalid musical instrument type');
         }
diff --git a/tests/Behavioral/Strategy/Payment/PaymentProcessorTest.php b/tests/Behavioral/Strategy/Payment/PaymentProcessorTest.php
new file mode 100644
index 0000000..8f58ca7
--- /dev/null
+++ b/tests/Behavioral/Strategy/Payment/PaymentProcessorTest.php
@@ -0,0 +1,39 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Growthdev\DesignPatterns\Tests\Behavioral\Strategy\Payment;
+
+use Growthdev\DesignPatterns\Behavioral\Strategy\Payment\CashPaymentMethod;
+use Growthdev\DesignPatterns\Behavioral\Strategy\Payment\CreditCardPaymentMethod;
+use Growthdev\DesignPatterns\Behavioral\Strategy\Payment\DebitCardPaymentMethod;
+use Growthdev\DesignPatterns\Behavioral\Strategy\Payment\PaymentProcessor;
+use PHPUnit\Framework\TestCase;
+
+final class PaymentProcessorTest extends TestCase
+{
+    public function testCanProcessPaymentWithCashPaymentMethod(): void
+    {
+        $paymentProcessor = new PaymentProcessor(new CashPaymentMethod());
+        $paymentProcessor->processPayment(100.00);
+
+        $this->assertEquals(90.00, $paymentProcessor->getAmount());
+    }
+
+    public function testCanProcessPaymentWithDebitCardPaymentMethod(): void
+    {
+        $paymentProcessor = new PaymentProcessor(new DebitCardPaymentMethod());
+        $paymentProcessor->processPayment(100.00);
+
+        $this->assertEquals(95.00, $paymentProcessor->getAmount());
+    }
+
+    public function testCanProcessPaymentWithCreditCardPaymentMethod(): void
+    {
+        $paymentProcessor = new PaymentProcessor(new CreditCardPaymentMethod());
+        $paymentProcessor->processPayment(100.00);
+
+        $this->assertEquals(100.00, $paymentProcessor->getAmount());
+    }
+
+}
\ No newline at end of file
diff --git a/tests/Behavioral/Strategy/Payment/PaymentProcessorWithoutStrategyTest b/tests/Behavioral/Strategy/Payment/PaymentProcessorWithoutStrategyTest
new file mode 100644
index 0000000..1986246
--- /dev/null
+++ b/tests/Behavioral/Strategy/Payment/PaymentProcessorWithoutStrategyTest
@@ -0,0 +1,44 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Growthdev\DesignPatterns\Tests\Behavioral\Strategy\Payment;
+
+use Growthdev\DesignPatterns\Behavioral\Strategy\Payment\CashPaymentMethod;
+use Growthdev\DesignPatterns\Behavioral\Strategy\Payment\CreditCardPaymentMethod;
+use Growthdev\DesignPatterns\Behavioral\Strategy\Payment\DebitCardPaymentMethod;
+use Growthdev\DesignPatterns\Behavioral\Strategy\Payment\PaymentProcessorWithoutStrategy;
+use PHPUnit\Framework\TestCase;
+
+final class PaymentProcessorTest extends TestCase
+{
+    public function testCanProcessPaymentWithCashPaymentMethod(): void
+    {
+        $paymentProcessor = new PaymentProcessorWithoutStrategy(
+            PaymentProcessorWithoutStrategy::PAYMENT_TYPE_CASH
+        );
+        $paymentProcessor->processPayment(100.00);
+
+        $this->assertEquals(90.00, $paymentProcessor->getAmount());
+    }
+
+    public function testCanProcessPaymentWithDebitCardPaymentMethod(): void
+    {
+        $paymentProcessor = new PaymentProcessorWithoutStrategy(
+            PaymentProcessorWithoutStrategy::PAYMENT_TYPE_DEBIT_CARD
+        );
+        $paymentProcessor->processPayment(100.00);
+
+        $this->assertEquals(95.00, $paymentProcessor->getAmount());
+    }
+
+    public function testCanProcessPaymentWithCreditCardPaymentMethod(): void
+    {
+        $paymentProcessor = new PaymentProcessorWithoutStrategy(
+            PaymentProcessorWithoutStrategy::PAYMENT_TYPE_CREDIT_CARD
+        );
+        $paymentProcessor->processPayment(100.00);
+
+        $this->assertEquals(100.00, $paymentProcessor->getAmount());
+    }
+}
diff --git a/tests/Behavioral/Strategy/WithMethodFactory/MusicalInstrumentStrategyWithMethodFactoryTest.php b/tests/Behavioral/Strategy/WithMethodFactory/MusicalInstrumentStrategyWithMethodFactoryTest.php
new file mode 100644
index 0000000..d6647dd
--- /dev/null
+++ b/tests/Behavioral/Strategy/WithMethodFactory/MusicalInstrumentStrategyWithMethodFactoryTest.php
@@ -0,0 +1,39 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Growthdev\DesignPatterns\Tests\Behavioral\Strategy\WithMethodFactory;
+
+use Growthdev\DesignPatterns\Behavioral\Strategy\WithMethodFactory\AcousticGuitarStrategy;
+use Growthdev\DesignPatterns\Behavioral\Strategy\WithMethodFactory\ElectricGuitarStrategy;
+use Growthdev\DesignPatterns\Behavioral\Strategy\WithMethodFactory\MusicalInstrumentFactory;
+use Growthdev\DesignPatterns\Creational\FactoryMethod\Product\AcousticGuitar;
+use Growthdev\DesignPatterns\Creational\FactoryMethod\Product\ElectricGuitar;
+use PHPUnit\Framework\TestCase;
+
+final class MusicalInstrumentStrategyWithMethodFactoryTest extends TestCase
+{
+    public function testCanCreateAcousticGuitar(): void
+    {
+        $factory = new MusicalInstrumentFactory();
+        $acousticGuitar = $factory->createMusicalInstrument(
+            new AcousticGuitarStrategy('Giannini Model')
+        );
+
+        $acousticGuitar->make();
+
+        $this->assertInstanceOf(AcousticGuitar::class, $acousticGuitar);
+    }
+
+    public function testCanCreateEletricGuitar(): void
+    {
+        $factory = new MusicalInstrumentFactory();
+        $eletricGuitar = $factory->createMusicalInstrument(
+            new ElectricGuitarStrategy('Tagima Model')
+        );
+
+        $eletricGuitar->make();
+
+        $this->assertInstanceOf(ElectricGuitar::class, $eletricGuitar);
+    }
+}
diff --git a/tests/Creational/FactoryMethod/MusicalInstrumentFactoryTest.php b/tests/Creational/FactoryMethod/MusicalInstrumentFactoryTest.php
index 52a3bcb..29f3682 100644
--- a/tests/Creational/FactoryMethod/MusicalInstrumentFactoryTest.php
+++ b/tests/Creational/FactoryMethod/MusicalInstrumentFactoryTest.php
@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-namespace DesignPatterns\Creational\FactoryMethod;
+namespace Growthdev\DesignPatterns\Tests\Creational\FactoryMethod;
 
 use Growthdev\DesignPatterns\Creational\FactoryMethod\MusicalInstrumentFactory;
 use Growthdev\DesignPatterns\Creational\FactoryMethod\Product\AcousticGuitar;