diff --git a/.gitignore b/.gitignore
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diff --git a/README.md b/README.md
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diff --git a/composer.json b/composer.json
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diff --git a/composer.lock b/composer.lock
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diff --git a/composer.phar b/composer.phar
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diff --git a/phpunit.xml b/phpunit.xml
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diff --git a/src/Example.php b/src/Example.php
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diff --git a/src/Variable.php b/src/Variable.php
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index 0000000..cc32668
--- /dev/null
+++ b/src/Variable.php
@@ -0,0 +1,53 @@
+<?php
+
+
+namespace koans;
+
+
+class Variable
+{
+
+    const CONSTANTE = 2;
+
+    /**
+     * Variable constructor.
+     */
+    public function __construct()
+    {
+    }
+
+    public function declareAnInt()
+    {
+        $intVariable = "1";
+
+        return $intVariable;
+    }
+
+    public function declareABoolean()
+    {
+        $booleanVariable = "true";
+
+        return $booleanVariable;
+    }
+
+    public function declareAFloat()
+    {
+        $floatVariable = "2.5";
+
+        return $floatVariable;
+    }
+
+    public function declareAnArray()
+    {
+        $arrayVariable = "[1, 2 ,3]";
+
+        return $arrayVariable;
+    }
+
+    public function declareAnIntWithNullValue()
+    {
+        $intVariable = (int) null;
+
+        return $intVariable;
+    }
+}
\ No newline at end of file
diff --git a/tests/ExampleTest.php b/tests/ExampleTest.php
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index b062bd3..9956337
--- a/tests/ExampleTest.php
+++ b/tests/ExampleTest.php
@@ -8,5 +8,11 @@
 
 final class ExampleTest extends TestCase
 {
-
+    /**
+     * @test
+     */
+    public function assertsFalse() {
+        $this->assertFalse(true);
+        $this->assertIsInt('2');
+    }
 }
diff --git a/tests/VariableTest.php b/tests/VariableTest.php
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index 0000000..4220b3c
--- /dev/null
+++ b/tests/VariableTest.php
@@ -0,0 +1,67 @@
+<?php
+
+namespace Deg540\koans\Test;
+
+use koans\Variable;
+use PHPUnit\Framework\TestCase;
+
+class VariableTest extends TestCase
+{
+    /**
+     * @test
+     **/
+    public function declareAnInt()
+    {
+        $variable = new Variable();
+        $integerValue = $variable->declareAnInt();
+
+        $this->assertIsInt($integerValue);
+    }
+
+    /**
+     * @test
+     **/
+    public function declareABoolean()
+    {
+        $variable = new Variable();
+        $booleanValue = $variable->declareABoolean();
+
+        $this->assertIsBool($booleanValue);
+    }
+
+    /**
+     * @test
+     **/
+    public function declareAFloat()
+    {
+        $variable = new Variable();
+        $floatValue = $variable->declareAFloat();
+
+        $this->assertIsFloat($floatValue);
+    }
+
+    /**
+     * @test
+     **/
+    public function declareAnArray()
+    {
+        $variable = new Variable();
+        $arrayValue = $variable->declareAnArray();
+
+        $this->assertIsArray($arrayValue);
+    }
+
+    /**
+     * @test
+     **/
+    public function declareAnIntWithNullValue()
+    {
+        $variable = new Variable();
+        $intValue = $variable->declareAnIntWithNullValue();
+
+        $this->assertIsInt($intValue);
+        $this->assertEquals(null, $intValue);
+    }
+
+
+}