diff --git a/TestAssets/TestProjects/ProjectsWithTests/MultipleFrameworkProject/GivenThatIWantSomeFakeTests.cs b/TestAssets/TestProjects/ProjectsWithTests/MultipleFrameworkProject/GivenThatIWantSomeFakeTests.cs
index 6f2f5ebc8..4be559988 100644
--- a/TestAssets/TestProjects/ProjectsWithTests/MultipleFrameworkProject/GivenThatIWantSomeFakeTests.cs
+++ b/TestAssets/TestProjects/ProjectsWithTests/MultipleFrameworkProject/GivenThatIWantSomeFakeTests.cs
@@ -8,14 +8,14 @@ namespace FakeTests
 {
     public class GivenThatIWantSomeFakeTests
     {
-#if NET451
+#if NET46
         [Fact]
-        public void NET451_succeeds()
+        public void NET46_succeeds()
         {
             Assert.True(true);
         }
 
-        [Fact(Skip="Skipped for NET451")]
+        [Fact(Skip="Skipped for NET46")]
         public void SkippedTest()
         {
 
@@ -45,8 +45,8 @@ namespace FakeTests
         {
             var shouldFail = string.IsNullOrEmpty(Environment.GetEnvironmentVariable("DOTNET_TEST_SHOULD_FAIL"));
 
-#if NET451
-            Assert.True(shouldFail, "Failing in NET451");
+#if NET46
+            Assert.True(shouldFail, "Failing in NET46");
 #else
             Assert.True(shouldFail, "Failing in NETCOREAPP1.0");
 #endif
diff --git a/TestAssets/TestProjects/ProjectsWithTests/MultipleFrameworkProject/project.json b/TestAssets/TestProjects/ProjectsWithTests/MultipleFrameworkProject/project.json
index 9c6f64cbe..62abd5eb1 100644
--- a/TestAssets/TestProjects/ProjectsWithTests/MultipleFrameworkProject/project.json
+++ b/TestAssets/TestProjects/ProjectsWithTests/MultipleFrameworkProject/project.json
@@ -20,7 +20,11 @@
         "System.Runtime.Serialization.Primitives": "4.1.1"
       }
     },
-    "net46": {}
+    "net46": {
+      "dependencies": {
+        "System.IO.FileSystem": "4.0.1"
+      }
+    }
   },
   "testRunner": "xunit"
 }
diff --git a/test/dotnet-test.Tests/GivenThatWeWantToRunTestsForMultipleTFMsInTheConsole.cs b/test/dotnet-test.Tests/GivenThatWeWantToRunTestsForMultipleTFMsInTheConsole.cs
index 0662cde3f..8f746ea8f 100644
--- a/test/dotnet-test.Tests/GivenThatWeWantToRunTestsForMultipleTFMsInTheConsole.cs
+++ b/test/dotnet-test.Tests/GivenThatWeWantToRunTestsForMultipleTFMsInTheConsole.cs
@@ -17,7 +17,7 @@ namespace Microsoft.Dotnet.Tools.Test.Tests
     {
         private readonly string _projectFilePath;
         private readonly string _defaultNetCoreAppOutputPath;
-        private readonly string _defaultNet451OutputPath;
+        private readonly string _defaultNet46OutputPath;
 
         public GivenThatWeWantToRunTestsForMultipleTFMsInTheConsole()
         {
@@ -36,7 +36,7 @@ namespace Microsoft.Dotnet.Tools.Test.Tests
             new RestoreCommand() { WorkingDirectory = testInstance.TestRoot }.Execute().Should().Pass();
 
             _defaultNetCoreAppOutputPath = Path.Combine(testInstance.TestRoot, "bin", "Debug", "netcoreapp1.0");
-            _defaultNet451OutputPath = Path.Combine(testInstance.TestRoot, "bin", "Debug", "net451", RuntimeEnvironmentRidExtensions.GetAllCandidateRuntimeIdentifiers().First());
+            _defaultNet46OutputPath = Path.Combine(testInstance.TestRoot, "bin", "Debug", "net46", RuntimeEnvironmentRidExtensions.GetAllCandidateRuntimeIdentifiers().First());
         }
 
         [WindowsOnlyFact]
@@ -46,18 +46,18 @@ namespace Microsoft.Dotnet.Tools.Test.Tests
             var result = testCommand
                 .ExecuteWithCapturedOutput($"{_projectFilePath}");
             result.Should().Pass();
-            result.StdOut.Should().Contain("Skipped for NET451");
+            result.StdOut.Should().Contain("Skipped for NET46");
             result.StdOut.Should().Contain("Skipped for NETCOREAPP1.0");
         }
 
         [WindowsOnlyFact]
-        public void It_builds_and_runs_tests_for_net451()
+        public void It_builds_and_runs_tests_for_net46()
         {
             var testCommand = new DotnetTestCommand();
             var result = testCommand
-                .ExecuteWithCapturedOutput($"{_projectFilePath} -f net451");
+                .ExecuteWithCapturedOutput($"{_projectFilePath} -f net46");
             result.Should().Pass();
-            result.StdOut.Should().Contain($"Skipped for NET451");
+            result.StdOut.Should().Contain($"Skipped for NET46");
             result.StdOut.Should().NotContain($"Skipped for NETCOREAPP1.0");
         }
 
@@ -69,7 +69,7 @@ namespace Microsoft.Dotnet.Tools.Test.Tests
                 .ExecuteWithCapturedOutput($"{_projectFilePath} -f netcoreapp1.0");
             result.Should().Pass();
             result.StdOut.Should().Contain($"Skipped for NETCOREAPP1.0");
-            result.StdOut.Should().NotContain($"Skipped for NET451");
+            result.StdOut.Should().NotContain($"Skipped for NET46");
         }
 
         [Fact]
@@ -103,15 +103,15 @@ namespace Microsoft.Dotnet.Tools.Test.Tests
         }
 
         [WindowsOnlyFact]
-        public void It_skips_build_when_the_no_build_flag_is_passed_for_net451()
+        public void It_skips_build_when_the_no_build_flag_is_passed_for_net46()
         {
             var rid = RuntimeEnvironmentRidExtensions.GetAllCandidateRuntimeIdentifiers().First();
             var buildCommand = new BuildCommand(_projectFilePath);
-            var result = buildCommand.Execute($"-f net451 -r {rid} -o {_defaultNet451OutputPath}");
+            var result = buildCommand.Execute($"-f net46 -r {rid} -o {_defaultNet46OutputPath}");
             result.Should().Pass();
 
             var testCommand = new DotnetTestCommand();
-            result = testCommand.Execute($"{_projectFilePath} -f net451 -r {rid} -o {_defaultNet451OutputPath} --no-build");
+            result = testCommand.Execute($"{_projectFilePath} -f net46 -r {rid} -o {_defaultNet46OutputPath} --no-build");
             result.Should().Pass();
         }
 
@@ -142,7 +142,7 @@ namespace Microsoft.Dotnet.Tools.Test.Tests
                 .ExecuteWithCapturedOutput($"{_projectFilePath}");
 
             result.Should().Fail();
-            result.StdOut.Should().Contain("Failing in NET451");
+            result.StdOut.Should().Contain("Failing in NET46");
             result.StdOut.Should().Contain("Failing in NETCOREAPP1.0");
         }
 
diff --git a/test/dotnet-test.Tests/GivenThatWeWantToUseDotnetTestE2EInDesignTimeForMultipleTFms.cs b/test/dotnet-test.Tests/GivenThatWeWantToUseDotnetTestE2EInDesignTimeForMultipleTFms.cs
index 8b55fa4fd..64fe2db58 100644
--- a/test/dotnet-test.Tests/GivenThatWeWantToUseDotnetTestE2EInDesignTimeForMultipleTFms.cs
+++ b/test/dotnet-test.Tests/GivenThatWeWantToUseDotnetTestE2EInDesignTimeForMultipleTFms.cs
@@ -18,7 +18,7 @@ namespace Microsoft.Dotnet.Tools.Test.Tests
     {
         private string _projectFilePath;
         private string _netCoreAppOutputPath;
-        private string _net451OutputPath;
+        private string _net46OutputPath;
 
         private void Setup([CallerMemberName] string callingMethod = "")
         {
@@ -44,8 +44,8 @@ namespace Microsoft.Dotnet.Tools.Test.Tests
             if (RuntimeEnvironment.OperatingSystemPlatform == Platform.Windows)
             {
                 var rid = RuntimeEnvironmentRidExtensions.GetAllCandidateRuntimeIdentifiers().First();
-                _net451OutputPath = Path.Combine(testInstance.TestRoot, "bin", "Debug", "net451", rid);
-                result = buildCommand.Execute($"-f net451 -r {rid} -o {_net451OutputPath}");
+                _net46OutputPath = Path.Combine(testInstance.TestRoot, "bin", "Debug", "net46", rid);
+                result = buildCommand.Execute($"-f net46 -r {rid} -o {_net46OutputPath}");
                 result.Should().Pass();
             }
         }
@@ -70,7 +70,7 @@ namespace Microsoft.Dotnet.Tools.Test.Tests
         }
 
         [WindowsOnlyFact(Skip="https://github.com/xunit/xunit/issues/934")]
-        public void It_discovers_tests_for_the_ProjectWithTestsWithNet451()
+        public void It_discovers_tests_for_the_ProjectWithTestsWithNet46()
         {
             Setup();
 
@@ -80,7 +80,7 @@ namespace Microsoft.Dotnet.Tools.Test.Tests
                 var rid = RuntimeEnvironmentRidExtensions.GetAllCandidateRuntimeIdentifiers().First();
 
                 var testCommand = new DotnetTestCommand();
-                var result = testCommand.Execute($"{_projectFilePath} -f net451 -r {rid} -o {_net451OutputPath} --port {adapter.Port} --no-build");
+                var result = testCommand.Execute($"{_projectFilePath} -f net46 -r {rid} -o {_net46OutputPath} --port {adapter.Port} --no-build");
                 result.Should().Pass();
 
                 adapter.Messages["TestSession.Connected"].Count.Should().Be(1);
@@ -111,7 +111,7 @@ namespace Microsoft.Dotnet.Tools.Test.Tests
         }
 
         [WindowsOnlyFact(Skip="https://github.com/xunit/xunit/issues/934")]
-        public void It_runs_tests_for_net451()
+        public void It_runs_tests_for_net46()
         {
             Setup();
 
@@ -121,7 +121,7 @@ namespace Microsoft.Dotnet.Tools.Test.Tests
 
                 var testCommand = new DotnetTestCommand();
                 var rid = RuntimeEnvironmentRidExtensions.GetAllCandidateRuntimeIdentifiers().First();
-                var result = testCommand.Execute($"{_projectFilePath} -f net451 -r {rid} -o {_net451OutputPath} --port {adapter.Port} --no-build");
+                var result = testCommand.Execute($"{_projectFilePath} -f net46 -r {rid} -o {_net46OutputPath} --port {adapter.Port} --no-build");
                 result.Should().Pass();
 
                 adapter.Messages["TestSession.Connected"].Count.Should().Be(1);