diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 50ebd69a..1620f4f5 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -38,9 +38,9 @@ jobs:
   - script: dotnet test --no-build -c $(Build.Configuration) -f net8.0 -l "trx;LogFileName=VSTestResults_net8.0.trx"
     displayName: Run .NET 8 unit tests
 
-  # Run .NET 7 unit tests
-  - script: dotnet test --no-build -c $(Build.Configuration) -f net7.0 -l "trx;LogFileName=VSTestResults_net7.0.trx"
-    displayName: Run .NET 7 unit tests
+  # Run .NET 9 unit tests
+  - script: dotnet test --no-build -c $(Build.Configuration) -f net9.0 -l "trx;LogFileName=VSTestResults_net9.0.trx"
+    displayName: Run .NET 9 unit tests
 
   # Run .NET Framework 4.7.2 unit tests
   - script: dotnet test --no-build -c $(Build.Configuration) -f net472 -l "trx;LogFileName=VSTestResults_net472.trx"
diff --git a/tests/CommunityToolkit.Common.UnitTests/CommunityToolkit.Common.UnitTests.csproj b/tests/CommunityToolkit.Common.UnitTests/CommunityToolkit.Common.UnitTests.csproj
index 920b2cd7..04243a10 100644
--- a/tests/CommunityToolkit.Common.UnitTests/CommunityToolkit.Common.UnitTests.csproj
+++ b/tests/CommunityToolkit.Common.UnitTests/CommunityToolkit.Common.UnitTests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net472;net7.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>net472;net8.0;net9.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/tests/CommunityToolkit.Diagnostics.UnitTests/CommunityToolkit.Diagnostics.UnitTests.csproj b/tests/CommunityToolkit.Diagnostics.UnitTests/CommunityToolkit.Diagnostics.UnitTests.csproj
index 150c0d3f..7135ee3e 100644
--- a/tests/CommunityToolkit.Diagnostics.UnitTests/CommunityToolkit.Diagnostics.UnitTests.csproj
+++ b/tests/CommunityToolkit.Diagnostics.UnitTests/CommunityToolkit.Diagnostics.UnitTests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net472;net7.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>net472;net8.0;net9.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/tests/CommunityToolkit.HighPerformance.UnitTests/CommunityToolkit.HighPerformance.UnitTests.csproj b/tests/CommunityToolkit.HighPerformance.UnitTests/CommunityToolkit.HighPerformance.UnitTests.csproj
index 516a2e52..3e5f44fb 100644
--- a/tests/CommunityToolkit.HighPerformance.UnitTests/CommunityToolkit.HighPerformance.UnitTests.csproj
+++ b/tests/CommunityToolkit.HighPerformance.UnitTests/CommunityToolkit.HighPerformance.UnitTests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net472;net7.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>net472;net8.0;net9.0</TargetFrameworks>
     <EnablePreviewFeatures>true</EnablePreviewFeatures>
     <NoWarn>$(NoWarn);CA2252</NoWarn>
   </PropertyGroup>
diff --git a/tests/CommunityToolkit.HighPerformance.UnitTests/Extensions/Test_SpinLockExtensions.cs b/tests/CommunityToolkit.HighPerformance.UnitTests/Extensions/Test_SpinLockExtensions.cs
index 6857393f..50b5d288 100644
--- a/tests/CommunityToolkit.HighPerformance.UnitTests/Extensions/Test_SpinLockExtensions.cs
+++ b/tests/CommunityToolkit.HighPerformance.UnitTests/Extensions/Test_SpinLockExtensions.cs
@@ -35,7 +35,7 @@ public unsafe void Test_ArrayExtensions_Pointer()
         Assert.AreEqual(sum, 1000 * 10);
     }
 
-#if NET7_0_OR_GREATER
+#if NET8_0_OR_GREATER
     [TestMethod]
     public void Test_ArrayExtensions_Ref()
     {
diff --git a/tests/CommunityToolkit.HighPerformance.UnitTests/Test_NullableReadOnlyRef{T}.cs b/tests/CommunityToolkit.HighPerformance.UnitTests/Test_NullableReadOnlyRef{T}.cs
index 114d6d53..5df68f11 100644
--- a/tests/CommunityToolkit.HighPerformance.UnitTests/Test_NullableReadOnlyRef{T}.cs
+++ b/tests/CommunityToolkit.HighPerformance.UnitTests/Test_NullableReadOnlyRef{T}.cs
@@ -2,7 +2,7 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-#if NET7_0_OR_GREATER
+#if NET8_0_OR_GREATER
 
 using System;
 using System.Runtime.CompilerServices;
diff --git a/tests/CommunityToolkit.HighPerformance.UnitTests/Test_NullableRef{T}.cs b/tests/CommunityToolkit.HighPerformance.UnitTests/Test_NullableRef{T}.cs
index 7799a67f..3cfd5443 100644
--- a/tests/CommunityToolkit.HighPerformance.UnitTests/Test_NullableRef{T}.cs
+++ b/tests/CommunityToolkit.HighPerformance.UnitTests/Test_NullableRef{T}.cs
@@ -2,7 +2,7 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-#if NET7_0_OR_GREATER
+#if NET8_0_OR_GREATER
 
 using System;
 using System.Runtime.CompilerServices;
diff --git a/tests/CommunityToolkit.HighPerformance.UnitTests/Test_ReadOnlyRef{T}.cs b/tests/CommunityToolkit.HighPerformance.UnitTests/Test_ReadOnlyRef{T}.cs
index ac2640bb..af7fd852 100644
--- a/tests/CommunityToolkit.HighPerformance.UnitTests/Test_ReadOnlyRef{T}.cs
+++ b/tests/CommunityToolkit.HighPerformance.UnitTests/Test_ReadOnlyRef{T}.cs
@@ -2,7 +2,7 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-#if NET7_0_OR_GREATER
+#if NET8_0_OR_GREATER
 
 using System.Runtime.CompilerServices;
 using Microsoft.VisualStudio.TestTools.UnitTesting;
diff --git a/tests/CommunityToolkit.HighPerformance.UnitTests/Test_Ref{T}.cs b/tests/CommunityToolkit.HighPerformance.UnitTests/Test_Ref{T}.cs
index ce17f01b..a9fc450b 100644
--- a/tests/CommunityToolkit.HighPerformance.UnitTests/Test_Ref{T}.cs
+++ b/tests/CommunityToolkit.HighPerformance.UnitTests/Test_Ref{T}.cs
@@ -2,7 +2,7 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-#if NET7_0_OR_GREATER
+#if NET8_0_OR_GREATER
 
 using System.Runtime.CompilerServices;
 using Microsoft.VisualStudio.TestTools.UnitTesting;
diff --git a/tests/CommunityToolkit.Mvvm.DisableINotifyPropertyChanging.UnitTests/CommunityToolkit.Mvvm.DisableINotifyPropertyChanging.UnitTests.csproj b/tests/CommunityToolkit.Mvvm.DisableINotifyPropertyChanging.UnitTests/CommunityToolkit.Mvvm.DisableINotifyPropertyChanging.UnitTests.csproj
index 388b7f39..c75186e2 100644
--- a/tests/CommunityToolkit.Mvvm.DisableINotifyPropertyChanging.UnitTests/CommunityToolkit.Mvvm.DisableINotifyPropertyChanging.UnitTests.csproj
+++ b/tests/CommunityToolkit.Mvvm.DisableINotifyPropertyChanging.UnitTests/CommunityToolkit.Mvvm.DisableINotifyPropertyChanging.UnitTests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net472;net7.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>net472;net8.0;net9.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/tests/CommunityToolkit.Mvvm.Internals.UnitTests/CommunityToolkit.Mvvm.Internals.UnitTests.csproj b/tests/CommunityToolkit.Mvvm.Internals.UnitTests/CommunityToolkit.Mvvm.Internals.UnitTests.csproj
index 430fab99..63a93ed4 100644
--- a/tests/CommunityToolkit.Mvvm.Internals.UnitTests/CommunityToolkit.Mvvm.Internals.UnitTests.csproj
+++ b/tests/CommunityToolkit.Mvvm.Internals.UnitTests/CommunityToolkit.Mvvm.Internals.UnitTests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net472;net7.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>net472;net8.0;net9.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/tests/CommunityToolkit.Mvvm.Roslyn4001.UnitTests/CommunityToolkit.Mvvm.Roslyn4001.UnitTests.csproj b/tests/CommunityToolkit.Mvvm.Roslyn4001.UnitTests/CommunityToolkit.Mvvm.Roslyn4001.UnitTests.csproj
index 17ecba75..c02c814d 100644
--- a/tests/CommunityToolkit.Mvvm.Roslyn4001.UnitTests/CommunityToolkit.Mvvm.Roslyn4001.UnitTests.csproj
+++ b/tests/CommunityToolkit.Mvvm.Roslyn4001.UnitTests/CommunityToolkit.Mvvm.Roslyn4001.UnitTests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net472;net7.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>net472;net8.0;net9.0</TargetFrameworks>
     <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings>
   </PropertyGroup>
 
diff --git a/tests/CommunityToolkit.Mvvm.Roslyn4031.UnitTests/CommunityToolkit.Mvvm.Roslyn4031.UnitTests.csproj b/tests/CommunityToolkit.Mvvm.Roslyn4031.UnitTests/CommunityToolkit.Mvvm.Roslyn4031.UnitTests.csproj
index f027142a..808888ee 100644
--- a/tests/CommunityToolkit.Mvvm.Roslyn4031.UnitTests/CommunityToolkit.Mvvm.Roslyn4031.UnitTests.csproj
+++ b/tests/CommunityToolkit.Mvvm.Roslyn4031.UnitTests/CommunityToolkit.Mvvm.Roslyn4031.UnitTests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net472;net7.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>net472;net8.0;net9.0</TargetFrameworks>
     <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings>
   </PropertyGroup>
 
diff --git a/tests/CommunityToolkit.Mvvm.Roslyn4120.UnitTests/CommunityToolkit.Mvvm.Roslyn4120.UnitTests.csproj b/tests/CommunityToolkit.Mvvm.Roslyn4120.UnitTests/CommunityToolkit.Mvvm.Roslyn4120.UnitTests.csproj
index a1fb65d0..6da4240e 100644
--- a/tests/CommunityToolkit.Mvvm.Roslyn4120.UnitTests/CommunityToolkit.Mvvm.Roslyn4120.UnitTests.csproj
+++ b/tests/CommunityToolkit.Mvvm.Roslyn4120.UnitTests/CommunityToolkit.Mvvm.Roslyn4120.UnitTests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net472;net7.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>net472;net8.0;net9.0</TargetFrameworks>
     <LangVersion>preview</LangVersion>
     <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings>
     <DefineConstants>$(DefineConstants);ROSLYN_4_12_0_OR_GREATER</DefineConstants>
diff --git a/tests/CommunityToolkit.Mvvm.SourceGenerators.Roslyn4001.UnitTests/CommunityToolkit.Mvvm.SourceGenerators.Roslyn4001.UnitTests.csproj b/tests/CommunityToolkit.Mvvm.SourceGenerators.Roslyn4001.UnitTests/CommunityToolkit.Mvvm.SourceGenerators.Roslyn4001.UnitTests.csproj
index eaa0f012..eb6b2962 100644
--- a/tests/CommunityToolkit.Mvvm.SourceGenerators.Roslyn4001.UnitTests/CommunityToolkit.Mvvm.SourceGenerators.Roslyn4001.UnitTests.csproj
+++ b/tests/CommunityToolkit.Mvvm.SourceGenerators.Roslyn4001.UnitTests/CommunityToolkit.Mvvm.SourceGenerators.Roslyn4001.UnitTests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net472;net7.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>net472;net8.0;net9.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/tests/CommunityToolkit.Mvvm.SourceGenerators.Roslyn4031.UnitTests/CommunityToolkit.Mvvm.SourceGenerators.Roslyn4031.UnitTests.csproj b/tests/CommunityToolkit.Mvvm.SourceGenerators.Roslyn4031.UnitTests/CommunityToolkit.Mvvm.SourceGenerators.Roslyn4031.UnitTests.csproj
index 6aa04926..bc610e94 100644
--- a/tests/CommunityToolkit.Mvvm.SourceGenerators.Roslyn4031.UnitTests/CommunityToolkit.Mvvm.SourceGenerators.Roslyn4031.UnitTests.csproj
+++ b/tests/CommunityToolkit.Mvvm.SourceGenerators.Roslyn4031.UnitTests/CommunityToolkit.Mvvm.SourceGenerators.Roslyn4031.UnitTests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net472;net7.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>net472;net8.0;net9.0</TargetFrameworks>
     <DefineConstants>$(DefineConstants);ROSLYN_4_3_1_OR_GREATER</DefineConstants>
   </PropertyGroup>
 
diff --git a/tests/CommunityToolkit.Mvvm.SourceGenerators.Roslyn4120.UnitTests/CommunityToolkit.Mvvm.SourceGenerators.Roslyn4120.UnitTests.csproj b/tests/CommunityToolkit.Mvvm.SourceGenerators.Roslyn4120.UnitTests/CommunityToolkit.Mvvm.SourceGenerators.Roslyn4120.UnitTests.csproj
index 7d0387be..62d9db41 100644
--- a/tests/CommunityToolkit.Mvvm.SourceGenerators.Roslyn4120.UnitTests/CommunityToolkit.Mvvm.SourceGenerators.Roslyn4120.UnitTests.csproj
+++ b/tests/CommunityToolkit.Mvvm.SourceGenerators.Roslyn4120.UnitTests/CommunityToolkit.Mvvm.SourceGenerators.Roslyn4120.UnitTests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net472;net7.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>net472;net8.0;net9.0</TargetFrameworks>
     <DefineConstants>$(DefineConstants);ROSLYN_4_3_1_OR_GREATER;ROSLYN_4_12_0_OR_GREATER</DefineConstants>
   </PropertyGroup>