diff --git a/Sources/Testing/Support/Locked+Platform.swift b/Sources/Testing/Support/Locked+Platform.swift
index 951e62da8..2b3f5b648 100644
--- a/Sources/Testing/Support/Locked+Platform.swift
+++ b/Sources/Testing/Support/Locked+Platform.swift
@@ -94,3 +94,14 @@ typealias DefaultLock = Never
 #warning("Platform-specific implementation missing: locking unavailable")
 typealias DefaultLock = Never
 #endif
+
+#if SWT_NO_DYNAMIC_LINKING
+/// A function which, when called by another file, ensures that the file in
+/// which ``DefaultLock`` is declared is linked.
+///
+/// When static linking is used, the linker may opt to strip some or all of the
+/// symbols (including protocol conformance metadata) declared in this file.
+/// ``LockedWith`` calls this function in ``LockedWith/init(rawValue:)`` to work
+/// around that issue.
+func linkLockImplementations() {}
+#endif
diff --git a/Sources/Testing/Support/Locked.swift b/Sources/Testing/Support/Locked.swift
index e8b17be7b..c69cfd351 100644
--- a/Sources/Testing/Support/Locked.swift
+++ b/Sources/Testing/Support/Locked.swift
@@ -66,6 +66,10 @@ struct LockedWith<L, T>: RawRepresentable where L: Lockable {
   private nonisolated(unsafe) var _storage: ManagedBuffer<T, L>
 
   init(rawValue: T) {
+#if SWT_NO_DYNAMIC_LINKING
+    linkLockImplementations()
+#endif
+
     _storage = _Storage.create(minimumCapacity: 1, makingHeaderWith: { _ in rawValue })
     _storage.withUnsafeMutablePointerToElements { lock in
       L.initializeLock(at: lock)