diff --git a/libcxx/test/libcxx/vendor/apple/swift-interop.sh.cpp b/libcxx/test/libcxx/vendor/apple/swift-interop.sh.cpp
new file mode 100755
index 0000000000000..87c6c80f62a7e
--- /dev/null
+++ b/libcxx/test/libcxx/vendor/apple/swift-interop.sh.cpp
@@ -0,0 +1,21 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// This test requires access to the Swift compiler, which we assume is only available on Apple
+// platforms for now.
+// REQUIRES: buildhost=darwin
+
+// std::string basic test
+// RUN: swiftc -cxx-interoperability-mode=default %S/swift-interop/string/main.swift -o %t.string.exe \
+// RUN:   -Xcc -nostdinc++ -Xcc -nostdlib++ -Xcc -isystem -Xcc "%{include-dir}"
+// RUN: %{exec} %t.string.exe
+
+// std::vector test with a modulemap
+// RUN: swiftc -cxx-interoperability-mode=default %S/swift-interop/vector/main.swift -o %t.vector.exe \
+// RUN:   -Xcc -nostdinc++ -Xcc -nostdlib++ -Xcc -isystem -Xcc "%{include-dir}" -Xcc -I -Xcc %S/swift-interop/vector
+// RUN: %{exec} %t.vector.exe
diff --git a/libcxx/test/libcxx/vendor/apple/swift-interop/string/main.swift b/libcxx/test/libcxx/vendor/apple/swift-interop/string/main.swift
new file mode 100755
index 0000000000000..1b2e12f839ba7
--- /dev/null
+++ b/libcxx/test/libcxx/vendor/apple/swift-interop/string/main.swift
@@ -0,0 +1,13 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+import CxxStdlib
+
+let s: std.string = "abc123"
+
+for char in s { print(char) }
diff --git a/libcxx/test/libcxx/vendor/apple/swift-interop/vector/header.h b/libcxx/test/libcxx/vendor/apple/swift-interop/vector/header.h
new file mode 100644
index 0000000000000..de41747de0515
--- /dev/null
+++ b/libcxx/test/libcxx/vendor/apple/swift-interop/vector/header.h
@@ -0,0 +1,13 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include <vector>
+
+using VectorOfInt = std::vector<int>;
+
+inline VectorOfInt getStdVector() { return {1, 2, 3}; }
diff --git a/libcxx/test/libcxx/vendor/apple/swift-interop/vector/main.swift b/libcxx/test/libcxx/vendor/apple/swift-interop/vector/main.swift
new file mode 100644
index 0000000000000..6ec3640881424
--- /dev/null
+++ b/libcxx/test/libcxx/vendor/apple/swift-interop/vector/main.swift
@@ -0,0 +1,13 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+import MyCxxDep // no explicit import of CxxStdlib
+
+let vec = getStdVector()
+
+for it in vec { print(it) }
diff --git a/libcxx/test/libcxx/vendor/apple/swift-interop/vector/module.modulemap b/libcxx/test/libcxx/vendor/apple/swift-interop/vector/module.modulemap
new file mode 100644
index 0000000000000..8dabb57126261
--- /dev/null
+++ b/libcxx/test/libcxx/vendor/apple/swift-interop/vector/module.modulemap
@@ -0,0 +1,4 @@
+module MyCxxDep {
+    header "header.h"
+    export *
+}