Index: Ringtoets/Integration/test/Ringtoets.Integration.Service.Test/MessageProviders/DesignWaterLevelCalculationMessageProviderTest.cs
===================================================================
diff -u -r55e286e8436b5061a9264ec8623b525f3015fe6e -rc7cfd69ca9c95a190e7cc4d0f8184d0c69bbc1c2
--- Ringtoets/Integration/test/Ringtoets.Integration.Service.Test/MessageProviders/DesignWaterLevelCalculationMessageProviderTest.cs	(.../DesignWaterLevelCalculationMessageProviderTest.cs)	(revision 55e286e8436b5061a9264ec8623b525f3015fe6e)
+++ Ringtoets/Integration/test/Ringtoets.Integration.Service.Test/MessageProviders/DesignWaterLevelCalculationMessageProviderTest.cs	(.../DesignWaterLevelCalculationMessageProviderTest.cs)	(revision c7cfd69ca9c95a190e7cc4d0f8184d0c69bbc1c2)
@@ -64,13 +64,31 @@
         {
             // Setup
             var provider = new DesignWaterLevelCalculationMessageProvider();
-            const string failureMessage = "It failed!";
 
             // Call
-            string message = provider.GetCalculationFailedMessage(name, failureMessage);
+            string message = provider.GetCalculationFailedMessage(name);
 
             // Assert
             string expectedMessage = $"Er is een fout opgetreden tijdens de toetspeil berekening '{name}'. " +
+                                     "Er is geen foutrapport beschikbaar.";
+            Assert.AreEqual(expectedMessage, message);
+        }
+
+        [Test]
+        [TestCase(null)]
+        [TestCase("")]
+        [TestCase("value")]
+        public void GetCalculationFailedWithErrorReportMessage_ValidNames_ExpectedValues(string name)
+        {
+            // Setup
+            var provider = new DesignWaterLevelCalculationMessageProvider();
+            const string failureMessage = "It failed";
+
+            // Call
+            string message = provider.GetCalculationFailedWithErrorReportMessage(name, failureMessage);
+
+            // Assert
+            string expectedMessage = $"Er is een fout opgetreden tijdens de toetspeil berekening '{name}'. " +
                                      $"Bekijk het foutrapport door op details te klikken.{Environment.NewLine}{failureMessage}";
             Assert.AreEqual(expectedMessage, message);
         }
@@ -79,6 +97,25 @@
         [TestCase(null)]
         [TestCase("")]
         [TestCase("value")]
+        public void GetCalculationFailedWithErrorReportMessage_ValidFailureMessages_ExpectedValues(string failureMessage)
+        {
+            // Setup
+            var provider = new DesignWaterLevelCalculationMessageProvider();
+            const string name = "calculation name";
+
+            // Call
+            string message = provider.GetCalculationFailedWithErrorReportMessage(name, failureMessage);
+
+            // Assert
+            string expectedMessage = $"Er is een fout opgetreden tijdens de toetspeil berekening '{name}'. " +
+                                     $"Bekijk het foutrapport door op details te klikken.{Environment.NewLine}{failureMessage}";
+            Assert.AreEqual(expectedMessage, message);
+        }
+
+        [Test]
+        [TestCase(null)]
+        [TestCase("")]
+        [TestCase("value")]
         public void GetCalculatedNotConvergedMessage_VariousParameters_ReturnsExpectedValue(string name)
         {
             // Setup