diff --git a/src/Test/SafeRouting.Tests.Unit/CommonTests.cs b/src/Test/SafeRouting.Tests.Unit/CommonTests.cs
index 74e6004..00e3ad8 100644
--- a/src/Test/SafeRouting.Tests.Unit/CommonTests.cs
+++ b/src/Test/SafeRouting.Tests.Unit/CommonTests.cs
@@ -14,6 +14,7 @@ public Task EmptySourceProducesCommonOutput()
   [Theory]
   [InlineData(LanguageVersion.CSharp10)]
   [InlineData(LanguageVersion.CSharp11)]
+  [InlineData(LanguageVersion.CSharp12)]
   public Task GlobalUsingsGeneratedForSupportedLanguageVersions(LanguageVersion version)
   {
     return TestHelper.Verify("", languageVersion: version, parameters: new object[] { version });
@@ -321,6 +322,7 @@ public void OnGet(string name)
   [InlineData(LanguageVersion.CSharp9)]
   [InlineData(LanguageVersion.CSharp10)]
   [InlineData(LanguageVersion.CSharp11)]
+  [InlineData(LanguageVersion.CSharp12)]
   public Task SupportedLanguageVersionsBuild(LanguageVersion version)
   {
     return TestHelper.Verify("", languageVersion: version, parameters: new object[] { version });
diff --git a/src/Test/SafeRouting.Tests.Unit/Snapshots/CommonTests.GlobalUsingsGeneratedForSupportedLanguageVersions_version=CSharp12#globalusings.g.verified.cs b/src/Test/SafeRouting.Tests.Unit/Snapshots/CommonTests.GlobalUsingsGeneratedForSupportedLanguageVersions_version=CSharp12#globalusings.g.verified.cs
new file mode 100644
index 0000000..d8161ca
--- /dev/null
+++ b/src/Test/SafeRouting.Tests.Unit/Snapshots/CommonTests.GlobalUsingsGeneratedForSupportedLanguageVersions_version=CSharp12#globalusings.g.verified.cs
@@ -0,0 +1,4 @@
+//HintName: globalusings.g.cs
+// <auto-generated/>
+
+global using static SafeRouting.Extensions.RouteValueExtensions;
\ No newline at end of file
diff --git a/src/Test/SafeRouting.Tests.Unit/Snapshots/CommonTests.SupportedLanguageVersionsBuild_version=CSharp12#globalusings.g.verified.cs b/src/Test/SafeRouting.Tests.Unit/Snapshots/CommonTests.SupportedLanguageVersionsBuild_version=CSharp12#globalusings.g.verified.cs
new file mode 100644
index 0000000..d8161ca
--- /dev/null
+++ b/src/Test/SafeRouting.Tests.Unit/Snapshots/CommonTests.SupportedLanguageVersionsBuild_version=CSharp12#globalusings.g.verified.cs
@@ -0,0 +1,4 @@
+//HintName: globalusings.g.cs
+// <auto-generated/>
+
+global using static SafeRouting.Extensions.RouteValueExtensions;
\ No newline at end of file