diff --git a/src/Adapter/MSTest.CoreAdapter/MSTestSettings.cs b/src/Adapter/MSTest.CoreAdapter/MSTestSettings.cs
index d6e679820a..5f2d5b1602 100644
--- a/src/Adapter/MSTest.CoreAdapter/MSTestSettings.cs
+++ b/src/Adapter/MSTest.CoreAdapter/MSTestSettings.cs
@@ -51,7 +51,7 @@ public MSTestSettings()
         {
             this.CaptureDebugTraces = true;
             this.MapInconclusiveToFailed = false;
-            this.MapNotRunnableToFailed = false;
+            this.MapNotRunnableToFailed = true;
             this.EnableBaseClassTestMethodsFromOtherAssemblies = true;
             this.ForcedLegacyMode = false;
             this.TestSettingsFile = null;
diff --git a/test/UnitTests/MSTest.CoreAdapter.Unit.Tests/Helpers/UnitTestOutcomeHelperTests.cs b/test/UnitTests/MSTest.CoreAdapter.Unit.Tests/Helpers/UnitTestOutcomeHelperTests.cs
index 8c7f4c89bd..fa67711828 100644
--- a/test/UnitTests/MSTest.CoreAdapter.Unit.Tests/Helpers/UnitTestOutcomeHelperTests.cs
+++ b/test/UnitTests/MSTest.CoreAdapter.Unit.Tests/Helpers/UnitTestOutcomeHelperTests.cs
@@ -54,10 +54,10 @@ public void UniTestHelperToTestOutcomeForUnitTestOutcomeErrorShouldReturnTestOut
         }
 
         [TestMethod]
-        public void UniTestHelperToTestOutcomeForUnitTestOutcomeNotRunnableShouldReturnTestOutcomeNone()
+        public void UniTestHelperToTestOutcomeForUnitTestOutcomeNotRunnableShouldReturnTestOutcomeFailed()
         {
             var resultOutcome = UnitTestOutcomeHelper.ToTestOutcome(UnitTestOutcome.NotRunnable, this.adapterSettings);
-            Assert.AreEqual(TestOutcome.None, resultOutcome);
+            Assert.AreEqual(TestOutcome.Failed, resultOutcome);
         }
 
         [TestMethod]
diff --git a/test/UnitTests/MSTest.CoreAdapter.Unit.Tests/MSTestSettingsTests.cs b/test/UnitTests/MSTest.CoreAdapter.Unit.Tests/MSTestSettingsTests.cs
index 36f292f1c2..d1bea068e7 100644
--- a/test/UnitTests/MSTest.CoreAdapter.Unit.Tests/MSTestSettingsTests.cs
+++ b/test/UnitTests/MSTest.CoreAdapter.Unit.Tests/MSTestSettingsTests.cs
@@ -65,7 +65,7 @@ public void MapInconclusiveToFailedIsByDefaultFalseWhenNotSpecified()
         }
 
         [TestMethod]
-        public void MapNotRunnableToFailedIsByDefaultFalseWhenNotSpecified()
+        public void MapNotRunnableToFailedIsByDefaultTrueWhenNotSpecified()
         {
             string runSettingxml =
                 @"<RunSettings>
@@ -75,7 +75,7 @@ public void MapNotRunnableToFailedIsByDefaultFalseWhenNotSpecified()
 
             MSTestSettings adapterSettings = MSTestSettings.GetSettings(runSettingxml, MSTestSettings.SettingsNameAlias);
 
-            Assert.AreEqual(adapterSettings.MapNotRunnableToFailed, false);
+            Assert.AreEqual(adapterSettings.MapNotRunnableToFailed, true);
         }
 
         [TestMethod]
@@ -887,7 +887,7 @@ public void PopulateSettingsShouldInitializeDefaultAdapterSettingsWhenDiscoveryC
             MSTestSettings adapterSettings = MSTestSettings.CurrentSettings;
             Assert.AreEqual(adapterSettings.CaptureDebugTraces, true);
             Assert.AreEqual(adapterSettings.MapInconclusiveToFailed, false);
-            Assert.AreEqual(adapterSettings.MapNotRunnableToFailed, false);
+            Assert.AreEqual(adapterSettings.MapNotRunnableToFailed, true);
             Assert.AreEqual(adapterSettings.EnableBaseClassTestMethodsFromOtherAssemblies, true);
         }
 
@@ -899,7 +899,7 @@ public void PopulateSettingsShouldInitializeDefaultSettingsWhenRunSettingsIsNull
             MSTestSettings adapterSettings = MSTestSettings.CurrentSettings;
             Assert.AreEqual(adapterSettings.CaptureDebugTraces, true);
             Assert.AreEqual(adapterSettings.MapInconclusiveToFailed, false);
-            Assert.AreEqual(adapterSettings.MapNotRunnableToFailed, false);
+            Assert.AreEqual(adapterSettings.MapNotRunnableToFailed, true);
             Assert.AreEqual(adapterSettings.EnableBaseClassTestMethodsFromOtherAssemblies, true);
         }
 
@@ -912,7 +912,7 @@ public void PopulateSettingsShouldInitializeDefaultSettingsWhenRunSettingsXmlIsE
             MSTestSettings adapterSettings = MSTestSettings.CurrentSettings;
             Assert.AreEqual(adapterSettings.CaptureDebugTraces, true);
             Assert.AreEqual(adapterSettings.MapInconclusiveToFailed, false);
-            Assert.AreEqual(adapterSettings.MapNotRunnableToFailed, false);
+            Assert.AreEqual(adapterSettings.MapNotRunnableToFailed, true);
             Assert.AreEqual(adapterSettings.EnableBaseClassTestMethodsFromOtherAssemblies, true);
         }
 
diff --git a/test/UnitTests/MSTest.CoreAdapter.Unit.Tests/ObjectModel/UnitTestResultTests.cs b/test/UnitTests/MSTest.CoreAdapter.Unit.Tests/ObjectModel/UnitTestResultTests.cs
index ef6db77911..945a7e276e 100644
--- a/test/UnitTests/MSTest.CoreAdapter.Unit.Tests/ObjectModel/UnitTestResultTests.cs
+++ b/test/UnitTests/MSTest.CoreAdapter.Unit.Tests/ObjectModel/UnitTestResultTests.cs
@@ -292,11 +292,12 @@ public void UniTestHelperToTestOutcomeForUnitTestOutcomeErrorShouldReturnTestOut
         }
 
         [TestMethod]
-        public void UniTestHelperToTestOutcomeForUnitTestOutcomeNotRunnableShouldReturnTestOutcomeNoneWhenNotSpecified()
+        public void UnitTestHelperToTestOutcomeForUnitTestOutcomeNotRunnableShouldReturnTestOutComeNoneWhenSpecifiedInAdapterSettings()
         {
             string runSettingxml =
             @"<RunSettings>
                     <MSTestV2>
+                        <MapNotRunnableToFailed>false</MapNotRunnableToFailed>
                     </MSTestV2>
                   </RunSettings>";
 
@@ -306,6 +307,21 @@ public void UniTestHelperToTestOutcomeForUnitTestOutcomeNotRunnableShouldReturnT
             Assert.AreEqual(TestOutcome.None, resultOutcome);
         }
 
+        [TestMethod]
+        public void UnitTestHelperToTestOutcomeForUnitTestOutcomeNotRunnableShouldReturnTestOutcomeFailedByDefault()
+        {
+            string runSettingxml =
+            @"<RunSettings>
+                    <MSTestV2>
+                    </MSTestV2>
+                  </RunSettings>";
+
+            var adapterSettings = MSTestSettings.GetSettings(runSettingxml, MSTestSettings.SettingsNameAlias);
+
+            var resultOutcome = UnitTestOutcomeHelper.ToTestOutcome(UnitTestOutcome.NotRunnable, adapterSettings);
+            Assert.AreEqual(TestOutcome.Failed, resultOutcome);
+        }
+
         [TestMethod]
         public void UniTestHelperToTestOutcomeForUnitTestOutcomeTimeoutShouldReturnTestOutcomeFailed()
         {