diff --git a/build.cake b/build.cake
index 15f0217d..74bb34b8 100644
--- a/build.cake
+++ b/build.cake
@@ -13,7 +13,7 @@ var configuration = Argument("configuration", "Release");
 //////////////////////////////////////////////////////////////////////
 
 var version = "4.2.0";
-var modifier = "-alpha.201";
+var modifier = "-alpha.919.3";
 
 var dbgSuffix = configuration.ToLower() == "debug" ? "-dbg" : "";
 var packageVersion = version + modifier + dbgSuffix;
diff --git a/src/NUnitTestAdapter/NUnit3TestExecutor.cs b/src/NUnitTestAdapter/NUnit3TestExecutor.cs
index 0a7dcb93..58e32fe3 100644
--- a/src/NUnitTestAdapter/NUnit3TestExecutor.cs
+++ b/src/NUnitTestAdapter/NUnit3TestExecutor.cs
@@ -119,10 +119,7 @@ public void RunTests(IEnumerable<string> sources, IRunContext runContext, IFrame
                 var vsTestFilter = VsTestFilterFactory.CreateVsTestFilter(Settings, runContext);
                 filter = builder.ConvertVsTestFilterToNUnitFilter(vsTestFilter);
             }
-            if (filter == null)
-            {
-                filter = builder.FilterByWhere(Settings.Where);
-            }
+            filter ??= builder.FilterByWhere(Settings.Where);
 
             foreach (string assemblyName in sources)
             {
diff --git a/src/NUnitTestAdapter/NUnitEngine/DiscoveryConverter.cs b/src/NUnitTestAdapter/NUnitEngine/DiscoveryConverter.cs
index 9473a515..2573418d 100644
--- a/src/NUnitTestAdapter/NUnitEngine/DiscoveryConverter.cs
+++ b/src/NUnitTestAdapter/NUnitEngine/DiscoveryConverter.cs
@@ -170,7 +170,7 @@ public IList<TestCase> Convert(NUnitResults discoveryResults, string assemblyPat
             return loadedTestCases;
 
             IEnumerable<NUnitDiscoveryTestCase> RunnableTestCases(bool isExplicit) =>
-                isExplicit || !Settings.DesignMode
+                isExplicit
                     ? TestRun.TestAssembly.AllTestCases
                     : TestRun.TestAssembly.RunnableTestCases;
         }
diff --git a/src/NUnitTestAdapter/NUnitTestFilterBuilder.cs b/src/NUnitTestAdapter/NUnitTestFilterBuilder.cs
index 92a1eacf..f5245470 100644
--- a/src/NUnitTestAdapter/NUnitTestFilterBuilder.cs
+++ b/src/NUnitTestAdapter/NUnitTestFilterBuilder.cs
@@ -65,6 +65,9 @@ public TestFilter ConvertVsTestFilterToNUnitFilter(IVsTestFilter vsFilter, IDisc
             return result;
         }
 
+        /// <summary>
+        /// Used when running from command line, mode Non-Ide,  e.g. 'dotnet test --filter xxxxx'.  Reads the TfsTestCaseFilterExpression.
+        /// </summary>
         public TestFilter ConvertVsTestFilterToNUnitFilter(IVsTestFilter vsFilter)
         {
             if (string.IsNullOrEmpty(vsFilter?.TfsTestCaseFilterExpression?.TestCaseFilterValue))
@@ -87,6 +90,9 @@ public TestFilter ConvertTfsFilterToNUnitFilter(IVsTestFilter vsFilter, IDiscove
             return testCases.Any() ? FilterByList(testCases) : NoTestsFound;
         }
 
+        /// <summary>
+        /// Used when a Where statement is added as a runsettings parameter, either in a runsettings file or on the command line from dotnet using the '-- NUnit.Where .....' statement.
+        /// </summary>
         public TestFilter FilterByWhere(string where)
         {
             if (string.IsNullOrEmpty(where))
diff --git a/src/NUnitTestAdapterTests/TestExecutionTests.cs b/src/NUnitTestAdapterTests/TestExecutionTests.cs
index e768fa0d..083f799c 100644
--- a/src/NUnitTestAdapterTests/TestExecutionTests.cs
+++ b/src/NUnitTestAdapterTests/TestExecutionTests.cs
@@ -82,11 +82,11 @@ public void LoadMockassembly()
         [TestCase("method =~ MockTest?", 5)]
         [TestCase("method =~ MockTest? and cat != MockCategory", 3)]
         [TestCase("namespace == ThisNamespaceDoesNotExist", 0)]
-        [TestCase("test==NUnit.Tests.Assemblies.MockTestFixture", MockTestFixture.Tests, TestName = "{m}_MockTestFixture")]
+        [TestCase("test==NUnit.Tests.Assemblies.MockTestFixture", MockTestFixture.Tests - MockTestFixture.Explicit, TestName = "{m}_MockTestFixture")]
         [TestCase("test==NUnit.Tests.IgnoredFixture and method == Test2", 1, TestName = "{m}_IgnoredFixture")]
-        [TestCase("class==NUnit.Tests.Assemblies.MockTestFixture", MockTestFixture.Tests)]
-        [TestCase("name==MockTestFixture", MockTestFixture.Tests + NUnit.Tests.TestAssembly.MockTestFixture.Tests)]
-        [TestCase("cat==FixtureCategory", MockTestFixture.Tests)]
+        [TestCase("class==NUnit.Tests.Assemblies.MockTestFixture", MockTestFixture.Tests - MockTestFixture.Explicit)]
+        [TestCase("name==MockTestFixture", MockTestFixture.Tests + NUnit.Tests.TestAssembly.MockTestFixture.Tests - MockTestFixture.Explicit)]
+        [TestCase("cat==FixtureCategory", MockTestFixture.Tests - MockTestFixture.Explicit)]
         public void TestsWhereShouldFilter(string filter, int expectedCount)
         {
             // Create a fake environment.
@@ -158,7 +158,7 @@ public void CorrectNumberOfTestCasesWereStarted()
                 Console.WriteLine(ev.TestCase.DisplayName);
             Assert.That(
                 testLog.Events.FindAll(e => e.EventType == eventType).Count,
-                Is.EqualTo(MockAssembly.ResultCount - BadFixture.Tests - IgnoredFixture.Tests - ExplicitFixture.Tests));
+                Is.EqualTo(MockAssembly.ResultCount - BadFixture.Tests - IgnoredFixture.Tests - ExplicitFixture.Tests - MockTestFixture.Explicit));
         }
 
         [Test]
diff --git a/src/NUnitTestAdapterTests/TestFilterConverterTests/TestFilterParserTests.cs b/src/NUnitTestAdapterTests/TestFilterConverterTests/TestFilterParserTests.cs
index 2d51a7cf..b00d16dd 100644
--- a/src/NUnitTestAdapterTests/TestFilterConverterTests/TestFilterParserTests.cs
+++ b/src/NUnitTestAdapterTests/TestFilterConverterTests/TestFilterParserTests.cs
@@ -173,7 +173,7 @@ public void TestParser(string input, string output)
         {
             Assert.That(_parser.Parse(input), Is.EqualTo($"<filter>{output}</filter>"));
 
-            XmlDocument doc = new XmlDocument();
+            XmlDocument doc = new ();
             Assert.DoesNotThrow(() => doc.LoadXml(output));
         }