diff --git a/phpunit.xml b/phpunit.xml
index 526669f..f88042b 100644
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -1,5 +1,13 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" bootstrap="vendor/autoload.php" convertErrorsToExceptions="true" convertNoticesToExceptions="true" convertWarningsToExceptions="true" colors="false" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd">
+<phpunit
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd"
+  bootstrap="vendor/autoload.php"
+  convertErrorsToExceptions="true"
+  convertNoticesToExceptions="true"
+  convertWarningsToExceptions="true"
+  colors="false"
+>
   <coverage>
     <include>
       <directory suffix=".php">src/NFe</directory>
@@ -15,6 +23,7 @@
     </testsuite>
   </testsuites>
   <php>
+    <ini name="memory_limit" value="-1" />
     <ini name="date.timezone" value="UTC"/>
     <env name="APP_ENV" value="testing"/>
     <env name="TEST_MODE" value="_override"/>
diff --git a/src/NFe/Common/Ajuste.php b/src/NFe/Common/Ajuste.php
index 50bfe75..d153c35 100644
--- a/src/NFe/Common/Ajuste.php
+++ b/src/NFe/Common/Ajuste.php
@@ -102,8 +102,8 @@ public function __construct($ajuste = [])
         $this->setTempoLimite(30);
         $root_path = dirname(dirname(dirname(__DIR__)));
         $cert_dir = $root_path . '/storage/certs';
-        $this->setArquivoChavePublica($cert_dir . '/public.pem');
-        $this->setArquivoChavePrivada($cert_dir . '/private.pem');
+        $this->getCertificado()->setArquivoChavePublica($cert_dir . '/public.pem');
+        $this->getCertificado()->setArquivoChavePrivada($cert_dir . '/private.pem');
 
         $this->setPastaXmlBase($root_path . '/storage/xml');
         $this->setPastaXmlInutilizado('{ambiente}/inutilizado');
diff --git a/src/NFe/Database/IBPT.php b/src/NFe/Database/IBPT.php
index 829c2ab..994a8f5 100644
--- a/src/NFe/Database/IBPT.php
+++ b/src/NFe/Database/IBPT.php
@@ -67,8 +67,6 @@ private function load($uf)
             return false;
         }
         $data = json_decode($content, true);
-        unset($this->tabela);
-        gc_collect_cycles();
         $this->tabela = [$uf => $data];
         return $data;
     }
diff --git a/tests/NFe/Common/ConfiguracaoTest.php b/tests/NFe/Common/ConfiguracaoTest.php
index 3232b4b..9b08780 100644
--- a/tests/NFe/Common/ConfiguracaoTest.php
+++ b/tests/NFe/Common/ConfiguracaoTest.php
@@ -4,6 +4,7 @@
 
 class ConfiguracaoTest extends \PHPUnit\Framework\TestCase
 {
+    /** @var Configuracao */
     private $config;
 
     protected function setUp(): void
@@ -51,11 +52,12 @@ public function testFields()
     public function testDataExpiracao()
     {
         $this->config
-            ->setArquivoChavePublica(dirname(dirname(__DIR__)) . '/resources/certs/public.pem')
-            ->setArquivoChavePrivada(dirname(dirname(__DIR__)) . '/resources/certs/private.pem');
-        $this->config
-            ->setChavePublica($this->config->getChavePublica())
-            ->setChavePrivada($this->config->getChavePrivada());
-        $this->assertEquals('2010-10-02', date('Y-m-d', $this->config->getExpiracao()));
+            ->getCertificado()
+                ->setArquivoChavePublica(dirname(dirname(__DIR__)) . '/resources/certs/public.pem')
+                ->setArquivoChavePrivada(dirname(dirname(__DIR__)) . '/resources/certs/private.pem');
+        $this->config->getCertificado()
+            ->setChavePublica($this->config->getCertificado()->getChavePublica())
+            ->setChavePrivada($this->config->getCertificado()->getChavePrivada());
+        $this->assertEquals('2010-10-02', date('Y-m-d', $this->config->getCertificado()->getExpiracao()));
     }
 }
diff --git a/tests/NFe/Core/SEFAZTest.php b/tests/NFe/Core/SEFAZTest.php
index c886605..a8f094e 100644
--- a/tests/NFe/Core/SEFAZTest.php
+++ b/tests/NFe/Core/SEFAZTest.php
@@ -2,6 +2,7 @@
 
 namespace NFe\Core;
 
+use NFe\Database\Estatico;
 use NFe\Logger\Log;
 use NFe\Task\Inutilizacao;
 use NFe\Task\Tarefa;
@@ -23,11 +24,21 @@ protected function tearDown(): void
      */
     public static function createSEFAZ()
     {
+        $banco = SEFAZ::getInstance()->getConfiguracao()->getBanco();
+        if ($banco instanceof Estatico) {
+            $banco->setIBPT(null);
+        }
+        SEFAZ::getInstance()->getConfiguracao()->setBanco(null);
+        SEFAZ::getInstance()->getConfiguracao()->setCertificado(null);
+        SEFAZ::getInstance()->setConfiguracao(null);
+        gc_collect_cycles();
         $emitente = \NFe\Entity\EmitenteTest::createEmitente();
         $sefaz = SEFAZ::getInstance(true);
         $sefaz->getConfiguracao()
-            ->setArquivoChavePublica(dirname(dirname(__DIR__)) . '/resources/certs/public.pem')
-            ->setArquivoChavePrivada(dirname(dirname(__DIR__)) . '/resources/certs/private.pem')
+            ->getCertificado()
+                ->setArquivoChavePublica(dirname(dirname(__DIR__)) . '/resources/certs/public.pem')
+                ->setArquivoChavePrivada(dirname(dirname(__DIR__)) . '/resources/certs/private.pem');
+        $sefaz->getConfiguracao()
             ->setEmitente($emitente);
         return $sefaz;
     }
diff --git a/tests/NFe/Database/BancoTest.php b/tests/NFe/Database/BancoTest.php
index 7ef1cf9..2c81236 100644
--- a/tests/NFe/Database/BancoTest.php
+++ b/tests/NFe/Database/BancoTest.php
@@ -222,12 +222,12 @@ public function onlineTestWSDL()
         global $app;
 
         $sefaz = \NFe\Core\SEFAZTest::createSEFAZ();
-        $sefaz->getConfiguracao()
+        $sefaz->getConfiguracao()->getCertificado()
             ->setArquivoChavePublica(dirname(dirname(dirname(__DIR__))) . '/docs/certs/public.pem')
             ->setArquivoChavePrivada(dirname(dirname(dirname(__DIR__))) . '/docs/certs/private.pem');
         $banco = $sefaz->getConfiguracao()->getBanco();
-        $chave_publica = $sefaz->getConfiguracao()->getArquivoChavePublica();
-        $chave_privada = $sefaz->getConfiguracao()->getArquivoChavePrivada();
+        $chave_publica = $sefaz->getConfiguracao()->getCertificado()->getArquivoChavePublica();
+        $chave_privada = $sefaz->getConfiguracao()->getCertificado()->getArquivoChavePrivada();
         $soap = new \Curl\Curl();
         $soap->setOpt(CURLOPT_SSLCERT, $chave_publica);
         $soap->setOpt(CURLOPT_SSLKEY, $chave_privada);
diff --git a/tests/NFe/Task/InutilizacaoTest.php b/tests/NFe/Task/InutilizacaoTest.php
index 2882548..9c5efa3 100644
--- a/tests/NFe/Task/InutilizacaoTest.php
+++ b/tests/NFe/Task/InutilizacaoTest.php
@@ -8,6 +8,11 @@ class InutilizacaoTest extends \PHPUnit\Framework\TestCase
 {
     public static function criaInutilizacao()
     {
+        \NFe\Core\SEFAZ::getInstance()
+            ->getConfiguracao()->getEmitente()->getEndereco()
+            ->getMunicipio()->getEstado()->setUF('PR');
+        \NFe\Core\SEFAZ::getInstance()
+            ->getConfiguracao()->getEmitente()->setCNPJ('08380787000176');
         $inutilizacao = new \NFe\Task\Inutilizacao();
         $inutilizacao->setUF(\NFe\Core\SEFAZ::getInstance()
             ->getConfiguracao()->getEmitente()->getEndereco()
@@ -57,7 +62,7 @@ public function testInutilizaInutilizado()
             $inutilizacao->fromArray($inutilizacao);
             $inutilizacao->fromArray($inutilizacao->toArray());
             $inutilizacao->fromArray(null);
-        } catch (Exception $e) {
+        } catch (\Exception $e) {
             \NFe\Common\CurlSoap::setPostFunction(null);
             throw $e;
         }
@@ -84,14 +89,16 @@ public function testInutilizaRejeitado()
         $inutilizacao = self::criaInutilizacao();
         $dom = $inutilizacao->getNode()->ownerDocument;
         $dom = $inutilizacao->assinar();
+        $this->expectException('\Exception');
         try {
-            $this->expectException('\Exception');
             $inutilizacao->envia($dom);
-        } catch (Exception $e) {
+        } catch (\Exception $e) {
             \NFe\Common\CurlSoap::setPostFunction(null);
             $this->assertEquals('241', $inutilizacao->getStatus());
+            throw $e;
+        } finally {
+            \NFe\Common\CurlSoap::setPostFunction(null);
         }
-        \NFe\Common\CurlSoap::setPostFunction(null);
     }
 
     public function testNormalization()