diff --git a/IntegrationTests/Tests/IntegrationTests/BasicTests.swift b/IntegrationTests/Tests/IntegrationTests/BasicTests.swift
index f02fd1faa69..91d6abd483a 100644
--- a/IntegrationTests/Tests/IntegrationTests/BasicTests.swift
+++ b/IntegrationTests/Tests/IntegrationTests/BasicTests.swift
@@ -94,7 +94,7 @@ private struct BasicTests {
     }
 
     @Test(
-        .skipHostOS(.windows, "'try!' expression unexpectedly raised an error: TSCBasic.Process.Error.missingExecutableProgram(program: \"which\")"),
+        .skipHostOS(.windows, "'try!' expression unexpectedly raised an error: TSCBasic.Process.Error.missingExecutableProgram(program: \"which\")")
     )
     func testSwiftCompiler() throws {
         try withTemporaryDirectory { tempDir in
diff --git a/Package.swift b/Package.swift
index 15d291a3eba..216810019bc 100644
--- a/Package.swift
+++ b/Package.swift
@@ -725,7 +725,7 @@ let package = Package(
 
         // MARK: Additional Test Dependencies
 
-            .testTarget(
+            .target(
                 /** SwiftPM internal build test suite support library */
                 name: "_InternalBuildTestSupport",
                 dependencies: [
@@ -734,13 +734,12 @@ let package = Package(
                     "SwiftBuildSupport",
                     "_InternalTestSupport"
                 ],
-                path: "Sources/_InternalBuildTestSupport",
                 swiftSettings: [
                     .unsafeFlags(["-static"]),
                 ]
             ),
 
-        .testTarget(
+        .target(
             /** SwiftPM internal test suite support library */
             name: "_InternalTestSupport",
             dependencies: [
@@ -755,7 +754,6 @@ let package = Package(
                 .product(name: "OrderedCollections", package: "swift-collections"),
                 "Workspace",
             ],
-            path: "./Sources/_InternalTestSupport",
             swiftSettings: [
                 .unsafeFlags(["-static"]),
             ]
diff --git a/Sources/_InternalTestSupport/Process.swift b/Sources/_InternalTestSupport/Process.swift
deleted file mode 100644
index eacfcbc2896..00000000000
--- a/Sources/_InternalTestSupport/Process.swift
+++ /dev/null
@@ -1,43 +0,0 @@
-/*
- This source file is part of the Swift.org open source project
-
- Copyright (c) 2014 - 2025 Apple Inc. and the Swift project authors
- Licensed under Apache License v2.0 with Runtime Library Exception
-
- See http://swift.org/LICENSE.txt for license information
- See http://swift.org/CONTRIBUTORS.txt for Swift project authors
- */
-
-public import Foundation
-
-public enum OperatingSystem: Hashable, Sendable {
-    case macOS
-    case windows
-    case linux
-    case android
-    case unknown
-}
-
-extension ProcessInfo {
-    #if os(macOS)
-    public static let hostOperatingSystem = OperatingSystem.macOS
-    #elseif os(Linux)
-    public static let hostOperatingSystem = OperatingSystem.linux
-    #elseif os(Windows)
-    public static let hostOperatingSystem = OperatingSystem.windows
-    #else
-    public static let hostOperatingSystem = OperatingSystem.unknown
-    #endif
-
-    #if os(Windows)
-    public static let EOL = "\r\n"
-    #else
-    public static let EOL = "\n"
-    #endif
-
-    #if os(Windows)
-    public static let exeSuffix = ".exe"
-    #else
-    public static let exeSuffix = ""
-    #endif
-}
diff --git a/Sources/_InternalTestSupport/SkippedTestSupport.swift b/Sources/_InternalTestSupport/SkippedTestSupport.swift
deleted file mode 100644
index b73727d1c64..00000000000
--- a/Sources/_InternalTestSupport/SkippedTestSupport.swift
+++ /dev/null
@@ -1,70 +0,0 @@
-
-/*
- This source file is part of the Swift.org open source project
-
- Copyright (c) 2014 - 2025 Apple Inc. and the Swift project authors
- Licensed under Apache License v2.0 with Runtime Library Exception
-
- See http://swift.org/LICENSE.txt for license information
- See http://swift.org/CONTRIBUTORS.txt for Swift project authors
- */
-
-import class Foundation.FileManager
-import class Foundation.ProcessInfo
-import Testing
-
-extension Trait where Self == Testing.ConditionTrait {
-    /// Skip test if the host operating system does not match the running OS.
-    public static func requireHostOS(_ os: OperatingSystem, when condition: Bool = true) -> Self {
-        enabled("This test requires a \(os) host OS.") {
-            ProcessInfo.hostOperatingSystem == os && condition
-        }
-    }
-
-    /// Skip test if the host operating system matches the running OS.
-    public static func skipHostOS(_ os: OperatingSystem, _ comment: Comment? = nil) -> Self {
-        disabled(comment ?? "This test cannot run on a \(os) host OS.") {
-            ProcessInfo.hostOperatingSystem == os
-        }
-    }
-
-    /// Skip test unconditionally
-    public static func skip(_ comment: Comment? = nil) -> Self {
-        disabled(comment ?? "Unconditional skip, a comment should be added for the reason") { true }
-    }
-
-    /// Skip test if the environment is self hosted.
-    public static func skipSwiftCISelfHosted(_ comment: Comment? = nil) -> Self {
-        disabled(comment ?? "SwiftCI is self hosted") {
-            ProcessInfo.processInfo.environment["SWIFTCI_IS_SELF_HOSTED"] != nil
-        }
-    }
-
-    /// Skip test if the test environment has a restricted network access, i.e. cannot get to internet.
-    public static func requireUnrestrictedNetworkAccess(_ comment: Comment? = nil) -> Self {
-        disabled(comment ?? "CI Environment has restricted network access") {
-            ProcessInfo.processInfo.environment["SWIFTCI_RESTRICTED_NETWORK_ACCESS"] != nil
-        }
-    }
-
-    /// Skip test if built by XCode.
-    public static func skipIfXcodeBuilt() -> Self {
-        disabled("Tests built by Xcode") {
-            #if Xcode
-            true
-            #else
-            false
-            #endif
-        }
-    }
-
-    /// Constructs a condition trait that causes a test to be disabled if the Foundation process spawning implementation
-    /// is not using `posix_spawn_file_actions_addchdir`.
-    public static var requireThreadSafeWorkingDirectory: Self {
-        disabled("Thread-safe process working directory support is unavailable.") {
-            // Amazon Linux 2 has glibc 2.26, and glibc 2.29 is needed for posix_spawn_file_actions_addchdir_np support
-            FileManager.default.contents(atPath: "/etc/system-release")
-                .map { String(decoding: $0, as: UTF8.self) == "Amazon Linux release 2 (Karoo)\n" } ?? false
-        }
-    }
-}
diff --git a/Tests/PackageRegistryTests/RegistryClientTests.swift b/Tests/PackageRegistryTests/RegistryClientTests.swift
index b8390c1900f..809fdf32b89 100644
--- a/Tests/PackageRegistryTests/RegistryClientTests.swift
+++ b/Tests/PackageRegistryTests/RegistryClientTests.swift
@@ -803,7 +803,7 @@ final class RegistryClientTests: XCTestCase {
         let availableManifests = try await registryClient.getAvailableManifests(
             package: identity,
             version: version,
-            observabilityScope: ObservabilitySystem.NOOP,
+            observabilityScope: ObservabilitySystem.NOOP
         )
 
         XCTAssertEqual(availableManifests["Package.swift"]?.toolsVersion, .v5_5)
@@ -3987,7 +3987,7 @@ extension RegistryClient {
             package: package.underlying,
             version: version,
             fileSystem: InMemoryFileSystem(),
-            observabilityScope: ObservabilitySystem.NOOP,
+            observabilityScope: ObservabilitySystem.NOOP
         )
     }