diff --git a/validator/src/test/java/org/mustangproject/validator/ZUGFeRDValidatorTest.java b/validator/src/test/java/org/mustangproject/validator/ZUGFeRDValidatorTest.java
index 2069dd2c..268d332b 100644
--- a/validator/src/test/java/org/mustangproject/validator/ZUGFeRDValidatorTest.java
+++ b/validator/src/test/java/org/mustangproject/validator/ZUGFeRDValidatorTest.java
@@ -1,6 +1,10 @@
 package org.mustangproject.validator;
 
 import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.file.Files;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 import org.xmlunit.builder.Input;
@@ -83,6 +87,75 @@ public void testPDFValidation() {
 
 	}
 
+	public void testPDFValidationWithInputStream() {
+		File tempFile = getResourceAsFile("invalidPDF.pdf");
+		/**used to be Rule	Status
+		 Specification: ISO 19005-3:2012, Clause: 6.2.11.4, Test number: 4
+		 If the FontDescriptor dictionary of an embedded CID font contains a CIDSet stream, then it shall identify all CIDs which are present in the font program, regardless of whether a CID in the font is referenced or used by the PDF or not.	Failed
+		 2 occurrences	Hide
+		 PDCIDFont
+		 fontFile_size == 0 || fontName.search(/[A-Z]{6}\+/) != 0 || CIDSet_size == 0 || cidSetListsAllGlyphs == true
+		 root/document[0]/pages[1](9 0 obj PDPage)/contentStream[0](18 0 obj PDContentStream)/operators[166]/font[0](WIUIIO+CIDFont+F2)/DescendantFonts[0](WIUIIO+CIDFont+F2)
+		 root/document[0]/pages[1](9 0 obj PDPage)/contentStream[0](18 0 obj PDContentStream)/operators[192]/font[0](VEXQUA+CIDFont+F1)/DescendantFonts[0](VEXQUA+CIDFont+F1)
+		 but new sample since that has been downgraded to warning
+		 */
+		ZUGFeRDValidator zfv = new ZUGFeRDValidator();
+		try (InputStream inputStream = Files.newInputStream(tempFile.toPath())) {
+			String res = zfv.validate(inputStream, tempFile.getName());
+
+			assertThat(res).valueByXPath("/validation/pdf/summary/@status")
+				.isEqualTo("invalid");
+
+			assertThat(res).valueByXPath("/validation/xml/summary/@status")
+				.isEqualTo("valid");
+
+			assertThat(res).valueByXPath("/validation/summary/@status")
+				.isEqualTo("invalid");
+		} catch (IOException e) {
+			fail();
+		}
+		tempFile = getResourceAsFile("validAvoir_FR_type380_BASICWL.pdf");
+		zfv = new ZUGFeRDValidator();
+		try (InputStream inputStream = Files.newInputStream(tempFile.toPath())) {
+			String res = zfv.validate(inputStream, tempFile.getName());
+			assertThat(res).valueByXPath("/validation/summary/@status")
+				.isEqualTo("valid");
+		} catch (IOException e) {
+			fail();
+		}
+
+		tempFile = getResourceAsFile("validAvoir_FR_type380_BASICWL.pdf");
+		zfv = new ZUGFeRDValidator();
+		try (InputStream inputStream = Files.newInputStream(tempFile.toPath())) {
+			String res = zfv.validate(inputStream, tempFile.getName());
+			assertThat(res).valueByXPath("/validation/summary/@status")
+				.isEqualTo("valid");
+		} catch (IOException e) {
+			fail();
+		}
+
+		tempFile = getResourceAsFile("validXRechnung.pdf");
+		zfv = new ZUGFeRDValidator();
+		try (InputStream inputStream = Files.newInputStream(tempFile.toPath())) {
+			String res = zfv.validate(inputStream, tempFile.getName());
+			assertThat(res).valueByXPath("/validation/summary/@status")
+				.isEqualTo("valid");
+		} catch (IOException e) {
+			fail();
+		}
+
+		tempFile = getResourceAsFile("invalidXRechnung.pdf");
+		zfv = new ZUGFeRDValidator();
+		try (InputStream inputStream = new FileInputStream(tempFile)) {
+			String res = zfv.validate(inputStream, tempFile.getName());
+			assertThat(res).valueByXPath("/validation/summary/@status")
+				.isEqualTo("invalid");
+		} catch (IOException e) {
+			fail();
+		}
+
+	}
+
 	/***
 	 * the XMLValidatorTests only cover the <xml></xml> part, this one includes the root element and
 	 * the global <summary></summary> part as well