diff --git a/tests/testcases/PdfBuilderEn16931Test.php b/tests/testcases/PdfBuilderEn16931Test.php
index d53bca4f..67bef475 100644
--- a/tests/testcases/PdfBuilderEn16931Test.php
+++ b/tests/testcases/PdfBuilderEn16931Test.php
@@ -169,9 +169,33 @@ public function testPdfMetaData(): void
         $this->assertArrayHasKey("Producer", $pdfDetails); //"FPDF 1.84"
         $this->assertArrayHasKey("CreationDate", $pdfDetails); //"2020-12-09T05:19:39+00:00"
         $this->assertArrayHasKey("Pages", $pdfDetails); //"1"
+        $this->assertArrayHasKey("fx:documenttype", $pdfDetails);
+        $this->assertArrayHasKey("fx:documentfilename", $pdfDetails);
+        $this->assertArrayHasKey("fx:version", $pdfDetails);
+        $this->assertArrayHasKey("fx:conformancelevel", $pdfDetails);
+        $this->assertArrayHasKey("pdfaid:part", $pdfDetails);
+        $this->assertArrayHasKey("pdfaid:conformance", $pdfDetails);
+        $this->assertArrayHasKey("dc:title", $pdfDetails);
+        $this->assertArrayHasKey("dc:creator", $pdfDetails);
+        $this->assertArrayHasKey("dc:description", $pdfDetails);
+        $this->assertArrayHasKey("xmp:creatortool", $pdfDetails);
+        $this->assertArrayHasKey("xmp:createdate", $pdfDetails);
+        $this->assertArrayHasKey("xmp:modifydate", $pdfDetails);
         $this->assertStringContainsString('FPDF', $pdfDetails["Producer"]);
         $this->assertStringContainsString(date("Y-m-d"), $pdfDetails["CreationDate"]);
         $this->assertEquals("1", $pdfDetails["Pages"]);
+        $this->assertEquals("INVOICE", $pdfDetails["fx:documenttype"]);
+        $this->assertEquals("factur-x.xml", $pdfDetails["fx:documentfilename"]);
+        $this->assertEquals("1.0", $pdfDetails["fx:version"]);
+        $this->assertEquals("EN 16931", $pdfDetails["fx:conformancelevel"]);
+        $this->assertEquals("3", $pdfDetails["pdfaid:part"]);
+        $this->assertEquals("B", $pdfDetails["pdfaid:conformance"]);
+        $this->assertEquals("Lieferant GmbH : Invoice 471102", $pdfDetails["dc:title"]);
+        $this->assertEquals("Lieferant GmbH", $pdfDetails["dc:creator"]);
+        $this->assertEquals("FacturX/ZUGFeRD Invoice 471102 dated 2018-03-05 issued by Lieferant GmbH", $pdfDetails["dc:description"]);
+        $this->assertStringContainsString('Factur-X PHP library', $pdfDetails["xmp:creatortool"]);
+        $this->assertEquals("2018-03-05T00:00:00+00:00", $pdfDetails["xmp:createdate"]);
+        $this->assertStringContainsString(date("Y-m-d"), $pdfDetails["xmp:modifydate"]);
     }
 
     public function testSetAdditionalCreatorTool(): void