diff --git a/dopt.DeltaBarth.Tests/PluginTest.cs b/dopt.DeltaBarth.Tests/PluginTest.cs
index 47baf18..3f0f1ee 100644
--- a/dopt.DeltaBarth.Tests/PluginTest.cs
+++ b/dopt.DeltaBarth.Tests/PluginTest.cs
@@ -182,6 +182,18 @@ namespace dopt.DeltaBarth.Tests
             test.Dispose();
         }
         [TestMethod]
+        public void Umsatzprognose_WithCompanyIdWithoutDate_Test_FailConnection()
+        {
+            var test = new TPlugin();
+            string apiUrlSet = config.apiUrl, user = config.username, password = config.password, database = config.database, mandant = config.mandant;
+            test.Startup(baseDataPath, apiUrlSet, user, password, database, mandant);
+            var comp_id = 1024;
+            var res = test.Umsatzprognose(comp_id, null);
+            Assert.AreEqual(1, res.status.code);
+            PrettyPrint(res);
+            test.Dispose();
+        }
+        [TestMethod]
         [TestCategory("ActiveAPI")]
         public void Umsatzprognose_WithoutCompanyIdWithInvalidDate_Test()
         {
@@ -195,6 +207,18 @@ namespace dopt.DeltaBarth.Tests
             test.Dispose();
         }
         [TestMethod]
+        public void Umsatzprognose_WithoutCompanyIdWithInvalidDate_Test_FailConnection()
+        {
+            var test = new TPlugin();
+            string apiUrlSet = config.apiUrl, user = config.username, password = config.password, database = config.database, mandant = config.mandant;
+            test.Startup(baseDataPath, apiUrlSet, user, password, database, mandant);
+            var date = new DateTime(2030, 1, 1, 12, 45, 30);
+            var res = test.Umsatzprognose(null, date);
+            Assert.AreEqual(1, res.status.code);
+            PrettyPrint(res);
+            test.Dispose();
+        }
+        [TestMethod]
         [TestCategory("ActiveAPI")]
         public void Umsatzprognose_WithoutCompanyIdWithValidDate_Test()
         {
@@ -207,5 +231,17 @@ namespace dopt.DeltaBarth.Tests
             PrettyPrint(res);
             test.Dispose();
         }
+        [TestMethod]
+        public void Umsatzprognose_WithoutCompanyIdWithValidDate_Test_FailConnection()
+        {
+            var test = new TPlugin();
+            string apiUrlSet = config.apiUrl, user = config.username, password = config.password, database = config.database, mandant = config.mandant;
+            test.Startup(baseDataPath, apiUrlSet, user, password, database, mandant);
+            var date = new DateTime(2015, 1, 1, 12, 45, 30);
+            var res = test.Umsatzprognose(null, date);
+            Assert.AreEqual(1, res.status.code);
+            PrettyPrint(res);
+            test.Dispose();
+        }
     }
 }