Index: Ringtoets/MacroStabilityInwards/test/Ringtoets.MacroStabilityInwards.Data.TestUtil.Test/MacroStabilityInwardsOutputTestFactoryTest.cs
===================================================================
diff -u -rb2f4b307c254c747a5cf01d2fb94970e5e954c36 -rc5836107e7d32e9802f3febb60303ea5c0c37484
--- Ringtoets/MacroStabilityInwards/test/Ringtoets.MacroStabilityInwards.Data.TestUtil.Test/MacroStabilityInwardsOutputTestFactoryTest.cs	(.../MacroStabilityInwardsOutputTestFactoryTest.cs)	(revision b2f4b307c254c747a5cf01d2fb94970e5e954c36)
+++ Ringtoets/MacroStabilityInwards/test/Ringtoets.MacroStabilityInwards.Data.TestUtil.Test/MacroStabilityInwardsOutputTestFactoryTest.cs	(.../MacroStabilityInwardsOutputTestFactoryTest.cs)	(revision c5836107e7d32e9802f3febb60303ea5c0c37484)
@@ -37,7 +37,6 @@
             Assert.IsNotNull(output);
             Assert.AreEqual(typeof(MacroStabilityInwardsOutput), output.GetType());
 
-            Assert.IsInstanceOf<MacroStabilityInwardsOutput>(output);
             Assert.IsNotNull(output.SlidingCurve);
             Assert.IsNotNull(output.SlipPlane);
         }
@@ -74,5 +73,29 @@
             Assert.IsNotNull(output.SlidingCurve);
             Assert.IsNotNull(output.SlipPlane);
         }
+
+        [Test]
+        public void CreateRandomOutput_WithoutParameters_ReturnsOutputWithExpectedProperties()
+        {
+            // Call
+            MacroStabilityInwardsOutput output = MacroStabilityInwardsOutputTestFactory.CreateRandomOutput();
+
+            // Assert
+            Assert.IsNotNull(output);
+            Assert.AreEqual(typeof(MacroStabilityInwardsOutput), output.GetType());
+
+            AssertIsConcreteValue(output.FactorOfStability);
+            AssertIsConcreteValue(output.ZValue);
+            AssertIsConcreteValue(output.ForbiddenZonesXEntryMax);
+            AssertIsConcreteValue(output.ForbiddenZonesXEntryMin);
+            Assert.IsNotNull(output.SlidingCurve);
+            Assert.IsNotNull(output.SlipPlane);
+        }
+
+        private static void AssertIsConcreteValue(double actualValue)
+        {
+            Assert.IsFalse(double.IsNaN(actualValue));
+            Assert.IsFalse(double.IsInfinity(actualValue));
+        }
     }
 }
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