diff --git a/Tests/LaurisParagraphTest.cs b/Tests/LaurisParagraphTest.cs
index 13985e4..3a8ca7c 100755
--- a/Tests/LaurisParagraphTest.cs
+++ b/Tests/LaurisParagraphTest.cs
@@ -29,8 +29,17 @@ namespace Tests
             string demo = "Klinische Chemie: Natrium: 139 [135 - 145] mmol/l;  " +
                 "Kalium: 5.2 [3.5 - 5] mmol/l;  Calcium: 2.4 [2.0 - 2.7] mmol/l;";
             LaurisParagraph lp = new LaurisParagraph(demo);
+            Assert.IsTrue(lp.IsLaurisParagraph);
             Assert.AreEqual(139, lp.Items["Natrium"].NumericalValue);
             Assert.AreEqual(2.4, lp.Items["Calcium"].NumericalValue);
         }
+
+        [Test]
+        public void ParseInvalidParagraph()
+        {
+            string demo = "Aktuelle Diagnosen:";
+            LaurisParagraph lp = new LaurisParagraph(demo);
+            Assert.IsFalse(lp.IsLaurisParagraph);
+        }
     }
 }