diff --git a/src/test/java/de/kosit/validationtool/impl/DefaultCheckTest.java b/src/test/java/de/kosit/validationtool/impl/DefaultCheckTest.java
index 7a5101d..421ea10 100644
--- a/src/test/java/de/kosit/validationtool/impl/DefaultCheckTest.java
+++ b/src/test/java/de/kosit/validationtool/impl/DefaultCheckTest.java
@@ -21,6 +21,7 @@ package de.kosit.validationtool.impl;
 
 import static de.kosit.validationtool.api.InputFactory.read;
 import static de.kosit.validationtool.impl.Helper.Simple.GARBAGE;
+import static de.kosit.validationtool.impl.Helper.Simple.NOT_WELLFORMED;
 import static org.assertj.core.api.Assertions.assertThat;
 
 import java.io.File;
@@ -113,4 +114,13 @@ public class DefaultCheckTest {
         assertThat(result.isProcessingSuccessful()).isFalse();
     }
 
+    @Test
+    public void testNotWellFormed() {
+        final Result result = this.implementation.checkInput(read(NOT_WELLFORMED));
+        assertThat(result).isNotNull();
+        assertThat(result.isWellformed()).isFalse();
+        assertThat(result.isSchemaValid()).isFalse();
+        assertThat(result.isProcessingSuccessful()).isFalse();
+    }
+
 }
diff --git a/src/test/java/de/kosit/validationtool/impl/Helper.java b/src/test/java/de/kosit/validationtool/impl/Helper.java
index 9cc9106..cf183a8 100644
--- a/src/test/java/de/kosit/validationtool/impl/Helper.java
+++ b/src/test/java/de/kosit/validationtool/impl/Helper.java
@@ -53,6 +53,8 @@ public class Helper {
 
         public static final URI INVALID = ROOT.resolve("input/simple-invalid.xml");
 
+        public static final URI NOT_WELLFORMED = ROOT.resolve("input/simple-not-wellformed.xml");
+
         public static final URI UNKNOWN = ROOT.resolve("input/unknown.xml");
 
         public static final URI GARBAGE = ROOT.resolve("input/no-xml.file");
diff --git a/src/test/resources/examples/simple/input/simple-not-wellformed.xml b/src/test/resources/examples/simple/input/simple-not-wellformed.xml
new file mode 100644
index 0000000..389ca94
--- /dev/null
+++ b/src/test/resources/examples/simple/input/simple-not-wellformed.xml
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<simple xmlns="http://validator.kosit.de/test-sample">
+    <inner>asldkfj</inner>
\ No newline at end of file