diff --git a/Sources/Commands/Utilities/TestingSupport.swift b/Sources/Commands/Utilities/TestingSupport.swift
index 32881cdf088..5b1e48fd30a 100644
--- a/Sources/Commands/Utilities/TestingSupport.swift
+++ b/Sources/Commands/Utilities/TestingSupport.swift
@@ -82,13 +82,13 @@ enum TestingSupport {
                 ),
                 sanitizers: sanitizers
             )
-            // Add the sdk platform path if we have it. If this is not present, we
-            // might always end up failing.
-            if let sdkPlatformFrameworksPath = try Destination.sdkPlatformFrameworkPaths() {
-                // appending since we prefer the user setting (if set) to the one we inject
-                env.appendPath("DYLD_FRAMEWORK_PATH", value: sdkPlatformFrameworksPath.fwk.pathString)
-                env.appendPath("DYLD_LIBRARY_PATH", value: sdkPlatformFrameworksPath.lib.pathString)
-            }
+
+            // Add the sdk platform path if we have it. If this is not present, we might always end up failing.
+            let sdkPlatformFrameworksPath = try Destination.sdkPlatformFrameworkPaths()
+            // appending since we prefer the user setting (if set) to the one we inject
+            env.appendPath("DYLD_FRAMEWORK_PATH", value: sdkPlatformFrameworksPath.fwk.pathString)
+            env.appendPath("DYLD_LIBRARY_PATH", value: sdkPlatformFrameworksPath.lib.pathString)
+
             try TSCBasic.Process.checkNonZeroExit(arguments: args, environment: env)
             // Read the temporary file's content.
             return try swiftTool.fileSystem.readFileContents(tempFile.path)
diff --git a/Sources/PackageModel/Destination.swift b/Sources/PackageModel/Destination.swift
index eab9121f9a8..01c3c00275b 100644
--- a/Sources/PackageModel/Destination.swift
+++ b/Sources/PackageModel/Destination.swift
@@ -195,12 +195,11 @@ public struct Destination: Encodable, Equatable {
         var extraCCFlags: [String] = []
         var extraSwiftCFlags: [String] = []
 #if os(macOS)
-        if let sdkPaths = try Destination.sdkPlatformFrameworkPaths(environment: environment) {
-            extraCCFlags += ["-F", sdkPaths.fwk.pathString]
-            extraSwiftCFlags += ["-F", sdkPaths.fwk.pathString]
-            extraSwiftCFlags += ["-I", sdkPaths.lib.pathString]
-            extraSwiftCFlags += ["-L", sdkPaths.lib.pathString]
-        }
+        let sdkPaths = try Destination.sdkPlatformFrameworkPaths(environment: environment)
+        extraCCFlags += ["-F", sdkPaths.fwk.pathString]
+        extraSwiftCFlags += ["-F", sdkPaths.fwk.pathString]
+        extraSwiftCFlags += ["-I", sdkPaths.lib.pathString]
+        extraSwiftCFlags += ["-L", sdkPaths.lib.pathString]
 #endif
 
 #if !os(Windows)
@@ -217,26 +216,29 @@ public struct Destination: Encodable, Equatable {
     /// Returns macosx sdk platform framework path.
     public static func sdkPlatformFrameworkPaths(
         environment: EnvironmentVariables = .process()
-    ) throws -> (fwk: AbsolutePath, lib: AbsolutePath)? {
+    ) throws -> (fwk: AbsolutePath, lib: AbsolutePath) {
         if let path = _sdkPlatformFrameworkPath {
             return path
         }
-        let platformPath = try? TSCBasic.Process.checkNonZeroExit(
+        let platformPath = try TSCBasic.Process.checkNonZeroExit(
             arguments: ["/usr/bin/xcrun", "--sdk", "macosx", "--show-sdk-platform-path"],
             environment: environment).spm_chomp()
 
-        if let platformPath = platformPath, !platformPath.isEmpty {
-            // For XCTest framework.
-            let fwk = try AbsolutePath(validating: platformPath).appending(
-                components: "Developer", "Library", "Frameworks")
+        guard !platformPath.isEmpty else {
+            throw StringError("could not determine SDK platform path")
+        }
+
+        // For XCTest framework.
+        let fwk = try AbsolutePath(validating: platformPath).appending(
+            components: "Developer", "Library", "Frameworks")
 
-            // For XCTest Swift library.
-            let lib = try AbsolutePath(validating: platformPath).appending(
-                components: "Developer", "usr", "lib")
+        // For XCTest Swift library.
+        let lib = try AbsolutePath(validating: platformPath).appending(
+            components: "Developer", "usr", "lib")
 
-            _sdkPlatformFrameworkPath = (fwk, lib)
-        }
-        return _sdkPlatformFrameworkPath
+        let sdkPlatformFrameworkPath = (fwk, lib)
+        _sdkPlatformFrameworkPath = sdkPlatformFrameworkPath
+        return sdkPlatformFrameworkPath
     }
 
     /// Cache storage for sdk platform path.
diff --git a/Sources/SPMTestSupport/Toolchain.swift b/Sources/SPMTestSupport/Toolchain.swift
index 6a50eb9a954..28e444f6e7a 100644
--- a/Sources/SPMTestSupport/Toolchain.swift
+++ b/Sources/SPMTestSupport/Toolchain.swift
@@ -33,18 +33,6 @@ private func resolveBinDir() throws -> AbsolutePath {
 #endif
 }
 
-extension UserToolchain {
-
-#if os(macOS)
-    public var sdkPlatformFrameworksPath: AbsolutePath {
-        get throws {
-            return try Destination.sdkPlatformFrameworkPaths()!.fwk
-        }
-    }
-#endif
-
-}
-
 extension Destination {
     public static var `default`: Self {
         get throws {
diff --git a/Tests/FunctionalTests/SwiftPMXCTestHelperTests.swift b/Tests/FunctionalTests/SwiftPMXCTestHelperTests.swift
index d2ffa047fe4..ec55f32d710 100644
--- a/Tests/FunctionalTests/SwiftPMXCTestHelperTests.swift
+++ b/Tests/FunctionalTests/SwiftPMXCTestHelperTests.swift
@@ -49,7 +49,7 @@ class SwiftPMXCTestHelperTests: XCTestCase {
 
     func XCTAssertXCTestHelper(_ bundlePath: AbsolutePath, testCases: NSDictionary) throws {
         #if os(macOS)
-        let env = ["DYLD_FRAMEWORK_PATH": try UserToolchain.default.sdkPlatformFrameworksPath.pathString]
+        let env = ["DYLD_FRAMEWORK_PATH": try Destination.sdkPlatformFrameworkPaths().fwk.pathString]
         let outputFile = bundlePath.parentDirectory.appending(component: "tests.txt")
         let _ = try SwiftPMProduct.XCTestHelper.execute([bundlePath.pathString, outputFile.pathString], env: env)
         guard let data = NSData(contentsOfFile: outputFile.pathString) else {