diff --git a/src/Process/EnvCommandCreator.php b/src/Process/EnvCommandCreator.php
index a897006..1e80372 100644
--- a/src/Process/EnvCommandCreator.php
+++ b/src/Process/EnvCommandCreator.php
@@ -43,10 +43,51 @@ public function execute(
                 continue;
             }
 
-            $res[$key] = $value;
-            $mergedArgs[strtolower($key)] = true;
+            if (!is_array($value)) {
+                $formattedValue = self::formatValueForEnv($value);
+                if (null !== $formattedValue) {
+                    $res[$key] = $value;
+                    $mergedArgs[strtolower($key)] = true;
+                }
+            } else {
+                self::decomposeRecursively($key, $value, $res, $mergedArgs);
+            }
         }
 
         return $res;
     }
+
+    /**
+     * @param array<mixed> $source
+     * @param array<mixed> $globalArray
+     * @param array<mixed> $mergedArgs
+     */
+    public static function decomposeRecursively(string $mainKey, array $source, array &$globalArray, array &$mergedArgs): void
+    {
+        foreach ($source as $childKey => $value) {
+            $newKey = $mainKey . '_' . $childKey;
+            if (is_array($value)) {
+                self::decomposeRecursively($newKey, $value, $globalArray, $mergedArgs);
+            } elseif (!array_key_exists($newKey, $globalArray)) {
+                $formattedValue = self::formatValueForEnv($value);
+                if (null !== $formattedValue) {
+                    $globalArray[$newKey] = $formattedValue;
+                    $mergedArgs[strtolower($newKey)] = true;
+                }
+            }
+        }
+    }
+
+    public static function formatValueForEnv(mixed $value): ?string
+    {
+        if (is_scalar($value)) {
+            return (string) $value;
+        }
+
+        if (is_object($value) && method_exists($value, '__toString')) {
+            return (string) $value;
+        }
+
+        return null;
+    }
 }
diff --git a/tests/Process/EnvCommandCreatorTest.php b/tests/Process/EnvCommandCreatorTest.php
index f19317b..e1e6a36 100644
--- a/tests/Process/EnvCommandCreatorTest.php
+++ b/tests/Process/EnvCommandCreatorTest.php
@@ -4,10 +4,13 @@
 
 namespace Liuggio\Fastest\Process;
 
+use Liuggio\Fastest\Trait\ServerDataTrait;
 use PHPUnit\Framework\TestCase;
 
 class EnvCommandCreatorTest extends TestCase
 {
+    use ServerDataTrait;
+
     /**
      * @test
      */
@@ -93,8 +96,7 @@ public function shouldMergeEnvVariables(): void
 
         $res = $envCommandCreator->execute(1, 5, 'exec_test_command', 4, true);
 
-        unset($_ENV['A_VARIABLE']);
-        unset($_ENV['another_variable']);
+        unset($_ENV['A_VARIABLE'], $_ENV['another_variable']);
 
         $this->assertEquals(
             [
@@ -104,8 +106,53 @@ public function shouldMergeEnvVariables(): void
                 EnvCommandCreator::ENV_TEST_ARGUMENT => 'exec_test_command',
                 EnvCommandCreator::ENV_TEST_INCREMENTAL_NUMBER => 4,
                 EnvCommandCreator::ENV_TEST_IS_FIRST_ON_CHANNEL => 1,
-            ] + $_SERVER + $_ENV,
+            ] + $this->getServerWithDecomposeArgv() + $_ENV,
             $res
         );
     }
+
+    /**
+     * @test
+     */
+    public function shouldMergeArrayEnvVariables(): void
+    {
+        $_SERVER['my_custom_array'] = [
+            'sub_array' => [
+                'another_array' => 'value_env',
+                'another_array_2' => 'value_env_2',
+            ],
+            'sub_array2' => 'value_env',
+        ];
+
+        $envCommandCreator = new EnvCommandCreator();
+
+        $res = $envCommandCreator->execute(1, 5, 'exec_test_command', 4, true);
+
+        $this->assertArrayHasKey('my_custom_array_sub_array_another_array', $res);
+        $this->assertEquals('value_env', $res['my_custom_array_sub_array_another_array']);
+        $this->assertArrayHasKey('my_custom_array_sub_array_another_array_2', $res);
+        $this->assertEquals('value_env_2', $res['my_custom_array_sub_array_another_array_2']);
+        $this->assertArrayHasKey('my_custom_array_sub_array2', $res);
+        $this->assertEquals('value_env', $res['my_custom_array_sub_array2']);
+        $this->assertArrayNotHasKey('my_custom_array', $res);
+    }
+
+    /**
+     * @test
+     */
+    public function shouldntMergeArrayEnvVariables(): void
+    {
+        $_SERVER['my_custom_array'] = 'my_important_value_env';
+        $_SERVER['my_custom'] = [
+            'array' => 'my_useless_value_env'
+        ];
+
+        $envCommandCreator = new EnvCommandCreator();
+
+        $res = $envCommandCreator->execute(1, 5, 'exec_test_command', 4, true);
+
+        $this->assertArrayHasKey('my_custom_array', $res);
+        $this->assertEquals('my_important_value_env', $res['my_custom_array']);
+        $this->assertArrayNotHasKey('my_custom', $res);
+    }
 }
\ No newline at end of file
diff --git a/tests/Process/ProcessFactoryTest.php b/tests/Process/ProcessFactoryTest.php
index e82f7a4..9d75347 100644
--- a/tests/Process/ProcessFactoryTest.php
+++ b/tests/Process/ProcessFactoryTest.php
@@ -2,10 +2,13 @@
 
 namespace Liuggio\Fastest\Process;
 
+use Liuggio\Fastest\Trait\ServerDataTrait;
 use PHPUnit\Framework\TestCase;
 
 class ProcessFactoryTest extends TestCase
 {
+    use ServerDataTrait;
+
     /**
      * @test
      */
@@ -23,7 +26,7 @@ public function shouldCreateACommandUsingParallelTests(): void
                 'ENV_TEST_ARGUMENT' => 'fileA',
                 'ENV_TEST_INC_NUMBER' => 10,
                 'ENV_TEST_IS_FIRST_ON_CHANNEL' => 1,
-            ] + $_SERVER + $_ENV,
+            ] + $this->getServerWithDecomposeArgv() + $_ENV,
             $process->getenv()
         );
     }
@@ -84,7 +87,7 @@ public function shouldCreateACommandUsingParallelTestsWithOptions(): void
                 'ENV_TEST_ARGUMENT' => 'fileA',
                 'ENV_TEST_INC_NUMBER' => 12,
                 'ENV_TEST_IS_FIRST_ON_CHANNEL' => 0,
-            ] + $_SERVER + $_ENV,
+            ] + $this->getServerWithDecomposeArgv() + $_ENV,
             $process->getenv()
         );
     }
@@ -106,7 +109,7 @@ public function shouldReplaceThePlaceholder(): void
                 'ENV_TEST_ARGUMENT' => 'fileA',
                 'ENV_TEST_INC_NUMBER' => 13,
                 'ENV_TEST_IS_FIRST_ON_CHANNEL' => 1,
-            ] + $_SERVER + $_ENV,
+            ] + $this->getServerWithDecomposeArgv() + $_ENV,
             $process->getenv()
         );
     }
diff --git a/tests/Trait/ServerDataTrait.php b/tests/Trait/ServerDataTrait.php
new file mode 100644
index 0000000..ab946be
--- /dev/null
+++ b/tests/Trait/ServerDataTrait.php
@@ -0,0 +1,29 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Liuggio\Fastest\Trait;
+
+use Liuggio\Fastest\Process\EnvCommandCreator;
+
+trait ServerDataTrait
+{
+    /**
+     * @return array<scalar>
+     */
+    protected function getServerWithDecomposeArgv(): array
+    {
+        $server = $_SERVER;
+
+        if (isset($server['argv']) && is_array($server['argv'])) {
+            $mergedArgs = array_fill_keys(
+                array_map('strtolower', array_keys($server)),
+                true
+            );
+            EnvCommandCreator::decomposeRecursively('argv', $server['argv'], $server, $mergedArgs);
+            unset($server['argv']);
+        }
+
+        return $server;
+    }
+}
\ No newline at end of file