diff --git a/test/phpunit/FunctionsLibTest.php b/test/phpunit/FunctionsLibTest.php
index b573044d1c4..642e36e37c6 100644
--- a/test/phpunit/FunctionsLibTest.php
+++ b/test/phpunit/FunctionsLibTest.php
@@ -80,6 +80,7 @@ class FunctionsLibTest extends PHPUnit\Framework\TestCase
 	protected $savuser;
 	protected $savlangs;
 	protected $savdb;
+	protected $savmysoc;
 
 	/**
 	 * Constructor
@@ -92,11 +93,12 @@ class FunctionsLibTest extends PHPUnit\Framework\TestCase
 		parent::__construct();
 
 		//$this->sharedFixture
-		global $conf,$user,$langs,$db;
+		global $conf,$user,$langs,$db,$mysoc;
 		$this->savconf=$conf;
 		$this->savuser=$user;
 		$this->savlangs=$langs;
 		$this->savdb=$db;
+		$this->savmysoc=$mysoc;
 
 		print __METHOD__." db->type=".$db->type." user->id=".$user->id;
 		//print " - db ".$db->db;
@@ -142,17 +144,18 @@ class FunctionsLibTest extends PHPUnit\Framework\TestCase
 	}
 
 	/**
-	 * Init phpunit tests
+	 * Init phpunit tests. Restore variables before each test.
 	 *
 	 * @return	void
 	 */
 	protected function setUp(): void
 	{
-		global $conf,$user,$langs,$db;
+		global $conf,$user,$langs,$db,$mysoc;
 		$conf=$this->savconf;
 		$user=$this->savuser;
 		$langs=$this->savlangs;
 		$db=$this->savdb;
+		$mysoc=$this->savmysoc;
 
 		print __METHOD__."\n";
 	}
@@ -1225,7 +1228,6 @@ class FunctionsLibTest extends PHPUnit\Framework\TestCase
 		// We do same tests but with option SERVICE_ARE_ECOMMERCE_200238EC on.
 		$conf->global->SERVICE_ARE_ECOMMERCE_200238EC = 1;
 
-
 		// Test RULE 1 (FR-US)
 		$vat=get_default_tva($companyfr, $companyus, 0);
 		$this->assertEquals(0, $vat, 'RULE 1 ECOMMERCE_200238EC');