diff --git a/htdocs/admin/pdf.php b/htdocs/admin/pdf.php
index 56e14ee748c..f4e12fd480f 100644
--- a/htdocs/admin/pdf.php
+++ b/htdocs/admin/pdf.php
@@ -640,7 +640,7 @@ print '</td></tr>';
 print '<tr class="oddeven"><td>'.$langs->trans("PDF_USE_A").'</td><td>';
 
 //$pdfa = false; // PDF default version
-$pdfa = getDolGlobalInt('PDF_USE_A', 3); 	// PDF/A-1 ou PDF/A-3
+$pdfa = getDolGlobalInt('PDF_USE_A', 0); 	// PDF/A-1 ou PDF/A-3
 
 print $form->selectarray('PDF_USE_A', $arraylistofpdfformat, $pdfa);
 print '</td></tr>';
diff --git a/htdocs/core/lib/pdf.lib.php b/htdocs/core/lib/pdf.lib.php
index 42c50d868e9..3e4c32493fd 100644
--- a/htdocs/core/lib/pdf.lib.php
+++ b/htdocs/core/lib/pdf.lib.php
@@ -181,7 +181,7 @@ function pdf_getInstance($format = '', $metric = 'mm', $pagetype = 'P')
 	//$metric=$arrayformat['unit'];
 
 	//$pdfa = false; // PDF default version
-	$pdfa = getDolGlobalInt('PDF_USE_A', 3); 	// PDF/A-1 ou PDF/A-3
+	$pdfa = getDolGlobalInt('PDF_USE_A', 0); 	// PDF/A-1 ou PDF/A-3
 
 	if (!getDolGlobalString('MAIN_DISABLE_TCPDI') && class_exists('TCPDI')) {
 		$pdf = new TCPDI($pagetype, $metric, $format, true, 'UTF-8', false, $pdfa);
diff --git a/test/phpunit/BuildDocTest.php b/test/phpunit/BuildDocTest.php
index 2ef528c7b84..25eef494d2e 100644
--- a/test/phpunit/BuildDocTest.php
+++ b/test/phpunit/BuildDocTest.php
@@ -161,7 +161,7 @@ class BuildDocTest extends CommonClassTest
 		// Crabe (english)
 		$localobject->model_pdf = 'crabe';
 		$result = $localobject->generateDocument($localobject->model_pdf, $langs);
-		$this->assertLessThan($result, 0);
+		$this->assertLessThan($result, 0, 'Error during the test of generation of crabe invoice');
 		print __METHOD__." result=".$result." for generation from crabe\n";
 
 		// Restore default usage with TCPDI
@@ -170,7 +170,7 @@ class BuildDocTest extends CommonClassTest
 		// Crabe (english)
 		$localobject->model_pdf = 'crabe';
 		$result = $localobject->generateDocument($localobject->model_pdf, $langs);
-		$this->assertLessThan($result, 0);
+		$this->assertLessThan($result, 0, 'Error during the test of generation of crabe invoice (MAIN_DISABLE_TCPDI=0 + watermark)');
 		print __METHOD__." result=".$result." for generation from crabe with MAIN_DISABLE_TCPDI and a watermark\n";
 
 		// Crabe (japanese)
@@ -178,7 +178,7 @@ class BuildDocTest extends CommonClassTest
 		$newlangs1->setDefaultLang('ja_JP');
 		$localobject->model_pdf = 'crabe';
 		$result = $localobject->generateDocument($localobject->model_pdf, $newlangs1);
-		$this->assertLessThan($result, 0);
+		$this->assertLessThan($result, 0, 'Error during the test of generation of document ja_JP');
 		print __METHOD__." result=".$result."\n";
 
 		// Crabe (saudiarabia)
@@ -186,7 +186,7 @@ class BuildDocTest extends CommonClassTest
 		$newlangs2a->setDefaultLang('sa_SA');
 		$localobject->model_pdf = 'crabe';
 		$result = $localobject->generateDocument($localobject->model_pdf, $newlangs2a);
-		$this->assertLessThan($result, 0);
+		$this->assertLessThan($result, 0, 'Error during the test of generation of document sa_SA');
 		print __METHOD__." result=".$result."\n";
 
 		// Crabe (english_saudiarabia)
@@ -194,7 +194,7 @@ class BuildDocTest extends CommonClassTest
 		$newlangs2b->setDefaultLang('en_SA');
 		$localobject->model_pdf = 'crabe';
 		$result = $localobject->generateDocument($localobject->model_pdf, $newlangs2b);
-		$this->assertLessThan($result, 0);
+		$this->assertLessThan($result, 0, 'Error during the test of generation of document en_SA');
 		print __METHOD__." result=".$result."\n";
 
 		// Crabe (greek)
@@ -202,7 +202,7 @@ class BuildDocTest extends CommonClassTest
 		$newlangs3->setDefaultLang('el_GR');
 		$localobject->model_pdf = 'crabe';
 		$result = $localobject->generateDocument($localobject->model_pdf, $newlangs3);
-		$this->assertLessThan($result, 0);
+		$this->assertLessThan($result, 0, 'Error during the test of generation of document el_GR');
 		print __METHOD__." result=".$result."\n";
 
 		// Crabe (chinese)
@@ -210,7 +210,7 @@ class BuildDocTest extends CommonClassTest
 		$newlangs4->setDefaultLang('zh_CN');
 		$localobject->model_pdf = 'crabe';
 		$result = $localobject->generateDocument($localobject->model_pdf, $newlangs4);
-		$this->assertLessThan($result, 0);
+		$this->assertLessThan($result, 0, 'Error during the test of generation of document zh_CN');
 		print __METHOD__." result=".$result."\n";
 
 		// Crabe (russian)
@@ -218,7 +218,7 @@ class BuildDocTest extends CommonClassTest
 		$newlangs5->setDefaultLang('ru_RU');
 		$localobject->model_pdf = 'crabe';
 		$result = $localobject->generateDocument($localobject->model_pdf, $newlangs5);
-		$this->assertLessThan($result, 0);
+		$this->assertLessThan($result, 0, 'Error during the test of generation of document ru_RU');
 		print __METHOD__." result=".$result."\n";
 
 		return 0;