diff --git a/src/Pretender.SourceGenerator/Emitter/GrandEmitter.cs b/src/Pretender.SourceGenerator/Emitter/GrandEmitter.cs
index 0d1cf88..4283b62 100644
--- a/src/Pretender.SourceGenerator/Emitter/GrandEmitter.cs
+++ b/src/Pretender.SourceGenerator/Emitter/GrandEmitter.cs
@@ -38,6 +38,7 @@ public CompilationUnitSyntax Emit(CancellationToken cancellationToken)
 
             foreach (var pretendEmitter in _pretendEmitters)
             {
+                cancellationToken.ThrowIfCancellationRequested();
                 namespaceDeclaration = namespaceDeclaration
                     .AddMembers(pretendEmitter.Emit(cancellationToken));
             }
@@ -45,9 +46,12 @@ public CompilationUnitSyntax Emit(CancellationToken cancellationToken)
             var setupInterceptorsClass = ClassDeclaration("SetupInterceptors")
                 .WithModifiers(TokenList(Token(SyntaxKind.FileKeyword), Token(SyntaxKind.StaticKeyword)));
 
+            cancellationToken.ThrowIfCancellationRequested();
+
             int setupIndex = 0;
             foreach (var setupEmitter in _setupEmitters)
             {
+                cancellationToken.ThrowIfCancellationRequested();
                 setupInterceptorsClass = setupInterceptorsClass
                     .AddMembers(setupEmitter.Emit(setupIndex, cancellationToken));
                 setupIndex++;
@@ -56,9 +60,13 @@ public CompilationUnitSyntax Emit(CancellationToken cancellationToken)
             var verifyInterceptorsClass = ClassDeclaration("VerifyInterceptors")
                 .AddModifiers(Token(SyntaxKind.FileKeyword), Token(SyntaxKind.StaticKeyword));
 
+            cancellationToken.ThrowIfCancellationRequested();
+
             int verifyIndex = 0;
             foreach (var verifyEmitter in _verifyEmitters)
             {
+                cancellationToken.ThrowIfCancellationRequested();
+
                 verifyInterceptorsClass = verifyInterceptorsClass
                     .AddMembers(verifyEmitter.Emit(verifyIndex, cancellationToken));
                 verifyIndex++;
@@ -67,9 +75,13 @@ public CompilationUnitSyntax Emit(CancellationToken cancellationToken)
             var createInterceptorsClass = ClassDeclaration("CreateInterceptors")
                 .AddModifiers(Token(SyntaxKind.FileKeyword), Token(SyntaxKind.StaticKeyword));
 
+            cancellationToken.ThrowIfCancellationRequested();
+
             int createIndex = 0;
             foreach (var createEmitter in _createEmitters)
             {
+                cancellationToken.ThrowIfCancellationRequested();
+
                 createInterceptorsClass = createInterceptorsClass
                     .AddMembers(createEmitter.Emit(cancellationToken));
                 createIndex++;
@@ -78,6 +90,8 @@ public CompilationUnitSyntax Emit(CancellationToken cancellationToken)
             namespaceDeclaration = namespaceDeclaration
                 .AddMembers(setupInterceptorsClass, verifyInterceptorsClass, createInterceptorsClass);
 
+            cancellationToken.ThrowIfCancellationRequested();
+
             return CompilationUnit()
                 .AddMembers(
                 KnownBlocks.InterceptsLocationAttribute,
diff --git a/src/Pretender.SourceGenerator/PretenderSourceGenerator.cs b/src/Pretender.SourceGenerator/PretenderSourceGenerator.cs
index a4af867..1663b8e 100644
--- a/src/Pretender.SourceGenerator/PretenderSourceGenerator.cs
+++ b/src/Pretender.SourceGenerator/PretenderSourceGenerator.cs
@@ -1,8 +1,6 @@
 using System.Collections.Immutable;
 using System.Text;
 using Microsoft.CodeAnalysis;
-using Microsoft.CodeAnalysis.CSharp;
-using Microsoft.CodeAnalysis.CSharp.Syntax;
 using Pretender.SourceGenerator.Emitter;
 using Pretender.SourceGenerator.Invocation;
 using Pretender.SourceGenerator.Parser;
@@ -14,12 +12,10 @@ public class PretenderSourceGenerator : IIncrementalGenerator
     {
         public void Initialize(IncrementalGeneratorInitializationContext context)
         {
-            // TODO: Refactor our region use
             IncrementalValueProvider<KnownTypeSymbols> knownTypeSymbols =
                 context.CompilationProvider
                     .Select((compilation, _) => new KnownTypeSymbols(compilation));
 
-            // TODO: Read settings off of 
             IncrementalValueProvider<PretenderSettings> settings = context.SyntaxProvider.ForAttributeWithMetadataName(
                 "Pretender.PretenderSettingsAttribute",
                 predicate: static (node, _) => true,
@@ -40,7 +36,6 @@ public void Initialize(IncrementalGeneratorInitializationContext context)
                     return PretenderSettings.FromAttribute(settings[0]);
                 });
 
-            #region Pretend
             IncrementalValuesProvider<(PretendEmitter? Emitter, ImmutableArray<Diagnostic>? Diagnostics)> pretendEmittersWithDiagnostics =
                  context.SyntaxProvider.CreateSyntaxProvider(
                      predicate: (node, _) => PretendInvocation.IsCandidateSyntaxNode(node),
@@ -57,9 +52,7 @@ public void Initialize(IncrementalGeneratorInitializationContext context)
                      .WithTrackingName("Pretend");
 
             var pretendEmitters = ReportDiagnostics(context, pretendEmittersWithDiagnostics);
-            #endregion
 
-            #region Setup
             IncrementalValuesProvider<(SetupEmitter? Emitter, ImmutableArray<Diagnostic>? Diagnostics)> setupEmittersWithDiagnostics =
                 context.SyntaxProvider.CreateSyntaxProvider(
                     predicate: static (node, _) => SetupInvocation.IsCandidateSyntaxNode(node),
@@ -75,9 +68,7 @@ public void Initialize(IncrementalGeneratorInitializationContext context)
                 .WithTrackingName("Setup");
 
             var setups = ReportDiagnostics(context, setupEmittersWithDiagnostics);
-            #endregion
 
-            #region Verify
             IncrementalValuesProvider<(VerifyEmitter? Emitter, ImmutableArray<Diagnostic>? Diagnostics)> verifyEmittersWithDiagnostics =
                 context.SyntaxProvider.CreateSyntaxProvider(
                     predicate: (node, _) => VerifyInvocation.IsCandidateSyntaxNode(node),
@@ -94,9 +85,7 @@ public void Initialize(IncrementalGeneratorInitializationContext context)
                 .WithTrackingName("Verify");
 
             var verifyEmitters = ReportDiagnostics(context, verifyEmittersWithDiagnostics);
-            #endregion
 
-            #region Create
             var createEmittersWithDiagnostics = context.SyntaxProvider.CreateSyntaxProvider(
                 predicate: (node, _) => CreateInvocation.IsCandidateSyntaxNode(node),
                 transform: CreateInvocation.Create)
@@ -111,7 +100,6 @@ public void Initialize(IncrementalGeneratorInitializationContext context)
                 .WithTrackingName("Create");
 
             var createEmitters = ReportDiagnostics(context, createEmittersWithDiagnostics);
-            #endregion
 
             context.RegisterSourceOutput(
                 pretendEmitters.Collect()
@@ -120,10 +108,15 @@ public void Initialize(IncrementalGeneratorInitializationContext context)
                 .Combine(createEmitters.Collect()), (context, emitters) =>
             {
                 var (((pretends, setups), verifies), creates) = emitters;
+
+                context.CancellationToken.ThrowIfCancellationRequested();
+
                 var grandEmitter = new GrandEmitter(pretends, setups, verifies, creates);
 
                 var compilationUnit = grandEmitter.Emit(context.CancellationToken);
 
+                context.CancellationToken.ThrowIfCancellationRequested();
+
                 context.AddSource("Pretender.g.cs", compilationUnit.GetText(Encoding.UTF8));
             });
         }
diff --git a/test/SourceGeneratorTests/MainTests.cs b/test/SourceGeneratorTests/MainTests.cs
index f04e2fa..bcd2462 100644
--- a/test/SourceGeneratorTests/MainTests.cs
+++ b/test/SourceGeneratorTests/MainTests.cs
@@ -45,9 +45,9 @@ public TestClass()
             }
             """);
 
-        Assert.Equal(1, result.GeneratedSources.Length);
+        var source = Assert.Single(result.GeneratedSources);
 
-        var text1 = result.GeneratedSources[0].SourceText.ToString();
+        var text1 = source.SourceText.ToString();
         //var text2 = result.GeneratedSources[1].SourceText.ToString();
     }