diff --git a/Tests/X509Tests/SecKeyWrapperTests.swift b/Tests/X509Tests/SecKeyWrapperTests.swift
index afd1e38..8fee824 100644
--- a/Tests/X509Tests/SecKeyWrapperTests.swift
+++ b/Tests/X509Tests/SecKeyWrapperTests.swift
@@ -12,8 +12,11 @@
 //
 //===----------------------------------------------------------------------===//
 
-@preconcurrency import XCTest
+import XCTest
 @_spi(Testing) @testable import X509
+#if canImport(Darwin)
+@preconcurrency import Security
+#endif
 
 #if canImport(Darwin)
 final class SecKeyWrapperTests: XCTestCase {
diff --git a/Tests/X509Tests/SignatureTests.swift b/Tests/X509Tests/SignatureTests.swift
index 9a7ae8a..efc9d0f 100644
--- a/Tests/X509Tests/SignatureTests.swift
+++ b/Tests/X509Tests/SignatureTests.swift
@@ -12,11 +12,14 @@
 //
 //===----------------------------------------------------------------------===//
 
-@preconcurrency import XCTest
+import XCTest
 @preconcurrency import Crypto
 import _CryptoExtras
 import SwiftASN1
 @testable import X509
+#if canImport(Darwin)
+@preconcurrency import Security
+#endif
 
 final class SignatureTests: XCTestCase {
     static let now = Date()