diff --git a/src/test/kotlin/de/gmuth/ipp/client/IppJobTests.kt b/src/test/kotlin/de/gmuth/ipp/client/IppJobTests.kt
index 052b04cc..70ec2210 100644
--- a/src/test/kotlin/de/gmuth/ipp/client/IppJobTests.kt
+++ b/src/test/kotlin/de/gmuth/ipp/client/IppJobTests.kt
@@ -209,4 +209,10 @@ class IppJobTests {
         job.cupsGetDocuments(save = true, directory = createTempDirectory().toFile())
     }
 
+    @Test
+    fun cupsGetDocumentsWithoutSaving() {
+        ippClientMock.mockResponse(cupsDocumentResponse("application/postscript"))
+        job.cupsGetDocuments()
+    }
+
 }
\ No newline at end of file
diff --git a/src/test/kotlin/de/gmuth/ipp/core/IppAttributesGroupTests.kt b/src/test/kotlin/de/gmuth/ipp/core/IppAttributesGroupTests.kt
index 81495288..0238f8e1 100644
--- a/src/test/kotlin/de/gmuth/ipp/core/IppAttributesGroupTests.kt
+++ b/src/test/kotlin/de/gmuth/ipp/core/IppAttributesGroupTests.kt
@@ -7,6 +7,7 @@ package de.gmuth.ipp.core
 import de.gmuth.ipp.core.IppAttributesGroup.Companion.replaceEnabled
 import de.gmuth.ipp.core.IppTag.*
 import java.io.File
+import java.io.PrintWriter
 import java.time.ZoneId
 import java.util.logging.Logger.getLogger
 import kotlin.test.Test
@@ -137,6 +138,11 @@ class IppAttributesGroupTests {
         group.saveText(File.createTempFile("tempfiles", ".tmp"))
     }
 
+    @Test
+    fun writeAttributesWithoutTitle() {
+        group.writeText(PrintWriter(java.lang.System.out), null)
+    }
+
     // ------------- interface Map methods ------------
 
     @Test
diff --git a/src/test/kotlin/de/gmuth/ipp/core/IppMessageTests.kt b/src/test/kotlin/de/gmuth/ipp/core/IppMessageTests.kt
index 02442c4f..00db2463 100644
--- a/src/test/kotlin/de/gmuth/ipp/core/IppMessageTests.kt
+++ b/src/test/kotlin/de/gmuth/ipp/core/IppMessageTests.kt
@@ -97,8 +97,13 @@ class IppMessageTests {
         assertEquals("codeDescription []", message.toString())
         message.log(logger)
         assertFailsWith<IppException> { // missing raw bytes
-            message.saveBytes(createTempFile("test", null))
+            message.saveBytes(createTempFile("rawbytes", null))
         }
     }
 
+    @Test
+    fun writeTest() {
+        message.saveText(createTempFile("text", null))
+    }
+
 }
\ No newline at end of file