Don't produce errors when an Exe project references a test project

src/Tasks/Microsoft.NET.Build.Tasks/targets/Microsoft.NET.Sdk.targets

@@ -1051,13 +1051,19 @@ Copyright (c) .NET Foundation. All rights reserved.
     <!-- Don't generate a NETSDK1151 error if a non self-contained Exe references a Blazor wasm Exe -->
     <ShouldBeValidatedAsExecutableReference>false</ShouldBeValidatedAsExecutableReference>
   </PropertyGroup>
-
+  
   <PropertyGroup Condition="'$(IsTestProject)' == 'true' And '$(ValidateExecutableReferencesMatchSelfContained)' == ''">
     <!-- Don't generate an error if a test project references a self-contained Exe.  Test projects
          use an OutputType of Exe but will usually call APIs in a referenced Exe rather than try
          to run it. -->
     <ValidateExecutableReferencesMatchSelfContained>false</ValidateExecutableReferencesMatchSelfContained>
   </PropertyGroup>
+
+  <PropertyGroup Condition="'$(IsTestProject)' == 'true'">
+    <!-- Don't generate an error if an Exe project references a test project. -->
+    <ShouldBeValidatedAsExecutableReference>false</ShouldBeValidatedAsExecutableReference>
+  </PropertyGroup>
+
 
   <UsingTask TaskName="ValidateExecutableReferences" AssemblyFile="$(MicrosoftNETBuildTasksAssembly)" />
 

src/Tests/Microsoft.NET.Build.Tests/ReferenceExeTests.cs

@@ -295,5 +295,42 @@ public void TestProjectCanReferenceExe(string testTemplateName)
                 .Pass();
 
         }
+
+        [RequiresMSBuildVersionTheory("17.0.0.32901")]
+        [InlineData("xunit")]
+        [InlineData("mstest")]
+        public void ExeProjectCanReferenceTestProject(string testTemplateName)
+        {
+            var testConsoleProject = new TestProject("ConsoleApp")
+            {
+                IsExe = true,
+                TargetFrameworks = "net6.0",
+                RuntimeIdentifier = EnvironmentInfo.GetCompatibleRid()
+            };
+
+            var testAsset = _testAssetsManager.CreateTestProject(testConsoleProject, identifier: testTemplateName);
+
+            var testProjectDirectory = Path.Combine(testAsset.TestRoot, "TestProject");
+            Directory.CreateDirectory(testProjectDirectory);
+
+            new DotnetCommand(Log, "new", testTemplateName)
+                .WithWorkingDirectory(testProjectDirectory)
+                .Execute()
+                .Should()
+                .Pass();
+
+            string consoleProjectDirectory = Path.Combine(testAsset.Path, testConsoleProject.Name);
+
+            new DotnetCommand(Log, "add", "reference", ".." + Path.DirectorySeparatorChar + "TestProject")
+                .WithWorkingDirectory(consoleProjectDirectory)
+                .Execute()
+                .Should()
+                .Pass();
+
+            new BuildCommand(Log, consoleProjectDirectory)
+                .Execute()
+                .Should()
+                .Pass();
+        }
     }
 }