diff --git a/Sources/XSTooling/Core/ProcessCommand.swift b/Sources/XSTooling/Core/ProcessCommand.swift
index 521305c..470e59d 100644
--- a/Sources/XSTooling/Core/ProcessCommand.swift
+++ b/Sources/XSTooling/Core/ProcessCommand.swift
@@ -1,6 +1,6 @@
 import Foundation
 
-public struct ProcessCommand: Hashable {
+public struct ProcessCommand: Hashable, @unchecked Sendable {
     public static func find(_ name: String) -> ProcessCommand? {
         guard let string = ProcessInfo.processInfo.environment["PATH"] else {
             return nil
diff --git a/Sources/XSTooling/Core/ProcessOutput.swift b/Sources/XSTooling/Core/ProcessOutput.swift
index 276a31a..ffe0cb1 100644
--- a/Sources/XSTooling/Core/ProcessOutput.swift
+++ b/Sources/XSTooling/Core/ProcessOutput.swift
@@ -1,7 +1,7 @@
 import Foundation
 
 /// Output of the process execution.
-public struct ProcessOutput: Hashable {
+public struct ProcessOutput: Hashable, @unchecked Sendable {
     /// Constants that specify the termination reason values that the system returns.
     public typealias TerminationReason = Process.TerminationReason
 
diff --git a/Sources/XSTooling/Shell.swift b/Sources/XSTooling/Shell.swift
index eef16dc..9071035 100644
--- a/Sources/XSTooling/Shell.swift
+++ b/Sources/XSTooling/Shell.swift
@@ -1,6 +1,6 @@
 import Foundation
 
-public struct Shell: Equatable {
+public struct Shell: Equatable, Sendable {
     /// The default shell.
     public static var `default`: Shell {
         let path = ProcessInfo.processInfo.environment["SHELL"]
diff --git a/Sources/XSTooling/Simctl.swift b/Sources/XSTooling/Simctl.swift
index 82fd538..0a77b7d 100644
--- a/Sources/XSTooling/Simctl.swift
+++ b/Sources/XSTooling/Simctl.swift
@@ -1,5 +1,5 @@
 /// Command line utility to control the Simulator.
-public struct Simctl: Equatable {
+public struct Simctl: Equatable, Sendable {
     public var command: ProcessCommand
 
     public init(command: ProcessCommand) {
@@ -14,7 +14,7 @@ public struct Simctl: Equatable {
         DeviceControl(simulator: self, udid: uuid)
     }
 
-    public struct DeviceControl {
+    public struct DeviceControl: Sendable {
         let simulator: Simctl
         let udid: String
 
@@ -38,7 +38,7 @@ public struct Simctl: Equatable {
         }
     }
 
-    public struct ApplicationControl {
+    public struct ApplicationControl: Sendable {
         let device: DeviceControl
         let bundleIdentifier: String
 
@@ -59,7 +59,7 @@ public struct Simctl: Equatable {
     }
 
     /// Installed app's container.
-    public struct Container {
+    public struct Container: Sendable {
         let application: ApplicationControl
 
         /// The .app bundle.
@@ -115,7 +115,7 @@ extension Simctl {
         return ListQuery(command: command.appending(arguments: arguments))
     }
 
-    public struct ListQuery<Format> {
+    public struct ListQuery<Format>: Sendable {
         public var command: ProcessCommand
 
         public func read() async throws -> ProcessOutput {
@@ -182,7 +182,7 @@ extension Simctl {
         }
     }
 
-    public struct DeviceInfo: Codable, Equatable {
+    public struct DeviceInfo: Codable, Equatable, Sendable {
         public let dataPath: String
         public let logPath: String
         public let udid: String
@@ -192,7 +192,7 @@ extension Simctl {
         public let name: String
     }
 
-    public struct DeviceType: Codable, Equatable {
+    public struct DeviceType: Codable, Equatable, Sendable {
         public let minRuntimeVersion: Int
         public let bundlePath: String
         public let maxRuntimeVersion: Int
diff --git a/Sources/XSTooling/XCRun.swift b/Sources/XSTooling/XCRun.swift
index f530f05..8f11017 100644
--- a/Sources/XSTooling/XCRun.swift
+++ b/Sources/XSTooling/XCRun.swift
@@ -1,5 +1,5 @@
 /// Run or locate development tools and properties.
-public struct XCRun: Equatable {
+public struct XCRun: Equatable, Sendable {
     public var command: ProcessCommand
 
     public init(path: String = "/usr/bin/xcrun") {
diff --git a/Tests/XSToolingTests/GHTest/GHTestCase.swift b/Tests/XSToolingTests/GHTest/GHTestCase.swift
index c721c3b..ff06125 100644
--- a/Tests/XSToolingTests/GHTest/GHTestCase.swift
+++ b/Tests/XSToolingTests/GHTest/GHTestCase.swift
@@ -31,10 +31,11 @@ class GHTestCase: XCTestCase {
 
     override func record(_ issue: XCTIssue) {
         if github.isEnabled {
+            let message = "\(self.name): \(issue.compactDescription)"
             if let location = issue.sourceCodeContext.location {
-                github.error(file: location.fileURL.absoluteString, line: location.lineNumber, message: issue.compactDescription)
+                github.error(file: location.fileURL.absoluteString, line: location.lineNumber, message: message)
             } else {
-                github.error(message: issue.compactDescription)
+                github.error(message: message)
             }
         }
         super.record(issue)