diff --git a/tests/testcases/PdfBuilderEn16931Test.php b/tests/testcases/PdfBuilderEn16931Test.php
index 67bef475..5904b806 100644
--- a/tests/testcases/PdfBuilderEn16931Test.php
+++ b/tests/testcases/PdfBuilderEn16931Test.php
@@ -194,7 +194,7 @@ public function testPdfMetaData(): void
         $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("2018-03-05", $pdfDetails["xmp:createdate"]);
         $this->assertStringContainsString(date("Y-m-d"), $pdfDetails["xmp:modifydate"]);
     }
 
@@ -527,4 +527,48 @@ public function testAttachAdditionalFileByContentAllValid(): void
         $this->assertEquals("EmbeddedFile", $pdfFilespecDetailsEF_UF["Type"]);
         $this->assertEquals(195, $pdfFilespecDetailsEF_UF["Length"]);
     }
+
+    public function testDeterministicMode(): void
+    {
+        $pdfBuilder = new ZugferdDocumentPdfBuilder(self::$document, self::$sourcePdfFilename);
+        $pdfBuilder->setDeterministicModeEnabled(true);
+        $pdfBuilder->generateDocument();
+        $pdfBuilder->saveDocument(self::$destPdfFilename);
+
+        $pdfParser = new PdfParser();
+        $pdfParsed = $pdfParser->parseFile(self::$destPdfFilename);
+        $pdfDetails = $pdfParsed->getDetails();
+
+        $this->assertIsArray($pdfDetails);
+        $this->assertArrayHasKey("Producer", $pdfDetails);
+        $this->assertArrayHasKey("CreationDate", $pdfDetails);
+        $this->assertArrayHasKey("Pages", $pdfDetails);
+        $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('2000-01-01', $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->assertStringContainsString('2000-01-01', $pdfDetails["xmp:createdate"]);
+        $this->assertStringContainsString('2000-01-01', $pdfDetails["xmp:modifydate"]);
+    }
 }