diff --git a/src/installer/tests/Melanzana.MachO.Tests/Data/a.fat.out b/src/installer/tests/Melanzana.MachO.Tests/Data/a.fat.out
deleted file mode 100755
index aabb34acb01cc5..00000000000000
Binary files a/src/installer/tests/Melanzana.MachO.Tests/Data/a.fat.out and /dev/null differ
diff --git a/src/installer/tests/Melanzana.MachO.Tests/Data/library.c b/src/installer/tests/Melanzana.MachO.Tests/Data/library.c
new file mode 100644
index 00000000000000..2b2d81db0df76d
--- /dev/null
+++ b/src/installer/tests/Melanzana.MachO.Tests/Data/library.c
@@ -0,0 +1,4 @@
+int add(int a, int b)
+{
+    return a + b;
+}
\ No newline at end of file
diff --git a/src/installer/tests/Melanzana.MachO.Tests/Data/main.c b/src/installer/tests/Melanzana.MachO.Tests/Data/main.c
new file mode 100644
index 00000000000000..c810b7d5eeb8af
--- /dev/null
+++ b/src/installer/tests/Melanzana.MachO.Tests/Data/main.c
@@ -0,0 +1,6 @@
+#include <stdio.h>
+
+int main()
+{
+    printf("Hello world");
+}
\ No newline at end of file
diff --git a/src/installer/tests/Melanzana.MachO.Tests/ReadTests.cs b/src/installer/tests/Melanzana.MachO.Tests/ReadTests.cs
index ea3960d55f133d..415dbd6278f951 100644
--- a/src/installer/tests/Melanzana.MachO.Tests/ReadTests.cs
+++ b/src/installer/tests/Melanzana.MachO.Tests/ReadTests.cs
@@ -24,25 +24,28 @@ public void ReadExecutable()
             var segments = objectFile.LoadCommands.OfType<MachSegment>().ToArray();
             Assert.Equal("__PAGEZERO", segments[0].Name);
             Assert.Equal("__TEXT", segments[1].Name);
-            Assert.Equal("__LINKEDIT", segments[2].Name);
+            Assert.Equal("__DATA_CONST", segments[2].Name);
+            Assert.Equal("__LINKEDIT", segments[3].Name);
 
             var symbolTable = objectFile.LoadCommands.OfType<MachSymbolTable>().FirstOrDefault();
             Assert.NotNull(symbolTable);
             var symbols = symbolTable!.Symbols.ToArray();
-            Assert.Equal(2, symbols.Length);
+            Assert.Equal(3, symbols.Length);
             Assert.Equal("__mh_execute_header", symbols[0].Name);
             Assert.Equal(0x100000000u, symbols[0].Value);
             Assert.Equal("_main", symbols[1].Name);
-            Assert.Equal(0x100003fa4u, symbols[1].Value);
+            Assert.Equal(0x100003F70u, symbols[1].Value);
+            Assert.Equal("_printf", symbols[2].Name);
+            Assert.Equal(0u, symbols[2].Value);
 
             var buildVersion = objectFile.LoadCommands.OfType<MachBuildVersion>().FirstOrDefault();
             Assert.NotNull(buildVersion);
             Assert.Equal(MachPlatform.MacOS, buildVersion!.Platform);
-            Assert.Equal("12.0.0", buildVersion!.MinimumPlatformVersion.ToString());
-            Assert.Equal("12.0.0", buildVersion!.SdkVersion.ToString());
+            Assert.Equal("14.0.0", buildVersion!.MinimumPlatformVersion.ToString());
+            Assert.Equal("15.0.0", buildVersion!.SdkVersion.ToString());
             Assert.Equal(1, buildVersion!.ToolVersions.Count);
             Assert.Equal(MachBuildTool.Ld, buildVersion!.ToolVersions[0].BuildTool);
-            Assert.Equal("711.0.0", buildVersion!.ToolVersions[0].Version.ToString());
+            Assert.Equal("1115.7.3", buildVersion!.ToolVersions[0].Version.ToString());
         }
 
         [Fact]
@@ -80,8 +83,8 @@ public void ReadObjectFile()
             Assert.Equal(0u, symbols[0].Value);
             Assert.Equal("ltmp1", symbols[1].Name);
             Assert.Equal(compactUnwindSection, symbols[1].Section);
-            Assert.Equal(0x18u, symbols[1].Value);
-            Assert.Equal("_main", symbols[2].Name);
+            Assert.Equal(0x20u, symbols[1].Value);
+            Assert.Equal("_add", symbols[2].Name);
             Assert.Equal(textSection, symbols[2].Section);
             Assert.Equal(0u, symbols[2].Value);
         }
diff --git a/src/installer/tests/Melanzana.MachO.Tests/RoundtripTests.cs b/src/installer/tests/Melanzana.MachO.Tests/RoundtripTests.cs
index 8f80254003046d..36e99845c69200 100644
--- a/src/installer/tests/Melanzana.MachO.Tests/RoundtripTests.cs
+++ b/src/installer/tests/Melanzana.MachO.Tests/RoundtripTests.cs
@@ -48,13 +48,6 @@ public void BasicRoundtrip()
             TestRoundtrip(aOutStream);
         }
 
-        [Fact]
-        public void FatRoundtrip()
-        {
-            var aFatOutStream = typeof(RoundtripTests).Assembly.GetManifestResourceStream("Melanzana.MachO.Tests.Data.a.fat.out")!;
-            TestFatRoundtrip(aFatOutStream);
-        }
-
         [Fact]
         public void ObjectFileRoundtrip()
         {
diff --git a/src/installer/tests/Microsoft.NET.HostModel.Tests/AppHost/CreateAppHost.cs b/src/installer/tests/Microsoft.NET.HostModel.Tests/AppHost/CreateAppHost.cs
index a419f22a727c11..43f30c59a78ccd 100644
--- a/src/installer/tests/Microsoft.NET.HostModel.Tests/AppHost/CreateAppHost.cs
+++ b/src/installer/tests/Microsoft.NET.HostModel.Tests/AppHost/CreateAppHost.cs
@@ -2,7 +2,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 
 using System;
-using System.Buffers.Binary;
 using System.Diagnostics;
 using System.IO;
 using System.Linq;
@@ -263,32 +262,6 @@ public void ExecutableImage()
                 .Be(expectedPermissions);
         }
 
-
-        [Fact]
-        public void DoesNotCodeSignAppHostByDefault()
-        {
-            using (TestArtifact artifact = CreateTestDirectory())
-            {
-                string sourceAppHostMock = PrepareMockMachAppHostFile(artifact.Location);
-                File.SetAttributes(sourceAppHostMock, FileAttributes.ReadOnly);
-                string destinationFilePath = Path.Combine(artifact.Location, "DestinationAppHost.exe.mock");
-                string appBinaryFilePath = "Test/App/Binary/Path.dll";
-                HostWriter.CreateAppHost(
-                   sourceAppHostMock,
-                   destinationFilePath,
-                   appBinaryFilePath,
-                   windowsGraphicalUserInterface: false);
-
-                if (!Codesign.IsAvailable())
-                {
-                    return;
-                }
-
-                var (exitCode, stdErr) = Codesign.Run("-d", destinationFilePath);
-                stdErr.Should().Contain($"{Path.GetFullPath(destinationFilePath)}: code object is not signed at all");
-            }
-        }
-
         [Theory]
         [InlineData("")]
         [InlineData("dir with spaces")]
@@ -339,6 +312,32 @@ public void CodeSignMachOAppHost(string subdir)
                 }
             }
         }
+
+        [Fact]
+        public void DoesNotCodeSignAppHostByDefault()
+        {
+            using (TestArtifact artifact = CreateTestDirectory())
+            {
+                string sourceAppHostMock = PrepareMockMachAppHostFile(artifact.Location);
+                File.SetAttributes(sourceAppHostMock, FileAttributes.ReadOnly);
+                string destinationFilePath = Path.Combine(artifact.Location, "DestinationAppHost.exe.mock");
+                string appBinaryFilePath = "Test/App/Binary/Path.dll";
+                HostWriter.CreateAppHost(
+                   sourceAppHostMock,
+                   destinationFilePath,
+                   appBinaryFilePath,
+                   windowsGraphicalUserInterface: false);
+
+                if (!Codesign.IsAvailable())
+                {
+                    return;
+                }
+
+                var (exitCode, stdErr) = Codesign.Run("-d", destinationFilePath);
+                stdErr.Should().Contain($"{Path.GetFullPath(destinationFilePath)}: code object is not signed at all");
+            }
+        }
+
         [Fact]
         public void CodeSigningFailuresThrow()
         {