diff --git a/test-compiler-plugin/ExamplePlugin/Package.swift b/test-compiler-plugin/ExamplePlugin/Package.swift
new file mode 100644
index 0000000..4595259
--- /dev/null
+++ b/test-compiler-plugin/ExamplePlugin/Package.swift
@@ -0,0 +1,23 @@
+// swift-tools-version: 5.7
+
+import PackageDescription
+
+let package = Package(
+  name: "ExamplePlugin",
+  platforms: [
+    .macOS(.v10_15),
+  ],
+  dependencies: [
+    .package(path: "../../../swift-syntax")
+  ],
+  targets: [
+    .executableTarget(
+      name: "ExamplePlugin",
+      dependencies: [
+        .product(name: "SwiftCompilerPlugin", package: "swift-syntax"),
+        .product(name: "SwiftSyntax", package: "swift-syntax"),
+        .product(name: "SwiftSyntaxMacros", package: "swift-syntax"),
+        .product(name: "SwiftDiagnostics", package: "swift-syntax"),
+      ]),
+  ]
+)
diff --git a/test-compiler-plugin/ExamplePlugin/Sources/ExamplePlugin/ExamplePlugin.swift b/test-compiler-plugin/ExamplePlugin/Sources/ExamplePlugin/ExamplePlugin.swift
new file mode 100644
index 0000000..5547a7f
--- /dev/null
+++ b/test-compiler-plugin/ExamplePlugin/Sources/ExamplePlugin/ExamplePlugin.swift
@@ -0,0 +1,10 @@
+import SwiftCompilerPlugin
+import SwiftSyntaxMacros
+
+@main
+struct ThePlugin: CompilerPlugin {
+  var providingMarcos: [Macro.Type] = [
+    EchoExpressionMacro.self,
+    MetadataMacro.self
+  ]
+}
diff --git a/test-compiler-plugin/ExamplePlugin/Sources/ExamplePlugin/Macros.swift b/test-compiler-plugin/ExamplePlugin/Sources/ExamplePlugin/Macros.swift
new file mode 100644
index 0000000..9ab9ce4
--- /dev/null
+++ b/test-compiler-plugin/ExamplePlugin/Sources/ExamplePlugin/Macros.swift
@@ -0,0 +1,37 @@
+import SwiftSyntax
+import SwiftSyntaxBuilder
+import SwiftSyntaxMacros
+
+struct EchoExpressionMacro: ExpressionMacro {
+  static func expansion<
+    Node: FreestandingMacroExpansionSyntax,
+    Context: MacroExpansionContext
+  >(
+    of node: Node,
+    in context: Context
+  ) throws -> ExprSyntax {
+    let expr: ExprSyntax = node.argumentList.first!.expression
+    return expr.with(\.leadingTrivia, [.blockComment("/* echo */")])
+  }
+}
+
+struct MetadataMacro: MemberMacro {
+  static func expansion<
+    Declaration: DeclGroupSyntax,
+    Context: MacroExpansionContext
+  >(
+    of node: SwiftSyntax.AttributeSyntax,
+    providingMembersOf declaration: Declaration,
+    in context: Context
+  ) throws -> [DeclSyntax] {
+    guard let cls = declaration.as(ClassDeclSyntax.self) else {
+      return []
+    }
+    let className = cls.identifier.trimmedDescription
+    return [
+      """
+        static var __metadata__ = ["name": "\(raw: className)"]
+        """
+    ]
+  }
+}
diff --git a/test-compiler-plugin/file.swift b/test-compiler-plugin/file.swift
new file mode 100644
index 0000000..93e09a0
--- /dev/null
+++ b/test-compiler-plugin/file.swift
@@ -0,0 +1,10 @@
+@freestanding(expression)
+macro echo<T>(_: T) -> T = #externalMacro(module: "ExamplePlugin", type: "EchoExpressionMacro")
+
+@attached(member)
+macro Metadata() = #externalMacro(module: "ExamplePlugin", type: "MetadataMacro")
+
+@Metadata
+class MyClass {
+  var value: Int = #echo(12)
+}
diff --git a/test-compiler-plugin/test.txt b/test-compiler-plugin/test.txt
new file mode 100644
index 0000000..bb8f4b4
--- /dev/null
+++ b/test-compiler-plugin/test.txt
@@ -0,0 +1,23 @@
+// REQUIRES: platform=Darwin
+//
+// RUN: rm -rf %t
+// RUN: mkdir -p %t
+// RUN: %{swift-build} --package-path %S/ExamplePlugin --build-path %t
+//
+// RUN: %{swift} -frontend -typecheck -swift-version 5 \
+// RUN:   -enable-experimental-feature Macros \
+// RUN:   -dump-macro-expansions \
+// RUN:   -load-plugin-executable %t/debug/ExamplePlugin#ExamplePlugin \
+// RUN:   %S/file.swift > %t/expansions-dump.txt 2>&1
+// 
+// RUN: %{FileCheck} %s < %t/expansions-dump.txt  
+
+// CHECK-LABEL: @__swiftmacro_4file7MyClassC8MetadatafMm_.swift
+// CHECK-NEXT: ------------------------------
+// CHECK-NEXT: static var __metadata__ = ["name": "MyClass"]
+// CHECK-NEXT: ------------------------------
+
+// CHECK-LABEL: @__swiftmacro_4file7MyClassC5valueSivpfi4echofMf_.swift as Int
+// CHECK-NEXT: ------------------------------
+// CHECK-NEXT: /* echo */12
+// CHECK-NEXT: ------------------------------