diff --git a/libc/test/integration/src/spawn/posix_spawn_test.cpp b/libc/test/integration/src/spawn/posix_spawn_test.cpp
@@ -0,0 +1,51 @@
+//===-- Unittests for posix_spawn -----------------------------------------===//
+//
+// 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 "test_binary_properties.h"
+
+#include "src/spawn/posix_spawn.h"
+#include "src/spawn/posix_spawn_file_actions_addopen.h"
+#include "src/spawn/posix_spawn_file_actions_destroy.h"
+#include "src/spawn/posix_spawn_file_actions_init.h"
+#include "src/sys/wait/waitpid.h"
+#include "utils/IntegrationTest/test.h"
+
+#include <fcntl.h>
+#include <spawn.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <sys/wait.h>
+
+char arg0[] = "libc_posix_spawn_test_binary";
+char *argv[] = {
+    arg0,
+    nullptr,
+};
+
+void spawn_and_wait_for_normal_exit(char **envp) {
+  pid_t cpid;
+  posix_spawn_file_actions_t file_actions;
+  ASSERT_EQ(__llvm_libc::posix_spawn_file_actions_init(&file_actions), 0);
+  __llvm_libc::posix_spawn_file_actions_addopen(
+      &file_actions, CHILD_FD, "testdata/posix_spawn.test", O_RDONLY, 0);
+  ASSERT_EQ(
+      __llvm_libc::posix_spawn(&cpid, arg0, &file_actions, nullptr, argv, envp),
+      0);
+  ASSERT_TRUE(cpid > 0);
+  int status;
+  ASSERT_EQ(__llvm_libc::waitpid(cpid, &status, 0), cpid);
+  ASSERT_EQ(__llvm_libc::posix_spawn_file_actions_destroy(&file_actions), 0);
+  ASSERT_TRUE(WIFEXITED(status));
+  int exit_status = WEXITSTATUS(status);
+  ASSERT_EQ(exit_status, 0);
+}
+
+TEST_MAIN(int argc, char **argv, char **envp) {
+  spawn_and_wait_for_normal_exit(envp);
+  return 0;
+}
diff --git a/libc/test/integration/src/spawn/posix_spawn_test_binary.cpp b/libc/test/integration/src/spawn/posix_spawn_test_binary.cpp
@@ -0,0 +1,22 @@
+#include "test_binary_properties.h"
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+
+int main(int argc, char **argv) {
+  if (argc != 1)
+    return 5;
+  constexpr size_t bufsize = sizeof(TEXT);
+  char buf[bufsize];
+  ssize_t readsize = bufsize - 1;
+  ssize_t len = read(CHILD_FD, buf, readsize);
+  if (len != readsize) {
+    return 1;
+  }
+  buf[readsize] = '\0'; // Null terminator
+  if (close(CHILD_FD) != 0)
+    return 2;
+  if (strcmp(buf, TEXT) != 0)
+    return 3;
+  return 0;
+}
diff --git a/libc/test/integration/src/spawn/test_binary_properties.h b/libc/test/integration/src/spawn/test_binary_properties.h
@@ -0,0 +1,15 @@
+//===-- Common definitions shared between test binary and test --*- C++ -*-===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LIBC_TEST_INTEGRATION_SRC_SPAWN_TEST_BINARY_PROPERTIES_H
+#define LIBC_TEST_INTEGRATION_SRC_SPAWN_TEST_BINARY_PROPERTIES_H
+
+constexpr int CHILD_FD = 10;
+constexpr char TEXT[] = "Hello, posix_spawn";
+
+#endif // LIBC_TEST_INTEGRATION_SRC_SPAWN_TEST_BINARY_PROPERTIES_H
diff --git a/libc/test/integration/src/spawn/testdata/CMakeLists.txt b/libc/test/integration/src/spawn/testdata/CMakeLists.txt
@@ -0,0 +1 @@
+file(GENERATE OUTPUT posix_spawn.test CONTENT "Hello, posix_spawn")
diff --git a/libc/utils/IntegrationTest/CMakeLists.txt b/libc/utils/IntegrationTest/CMakeLists.txt
@@ -1,5 +1,7 @@
-add_header_library(
+add_object_library(
   test
+  SRCS
+    test.cpp
   HDRS
     test.h
   DEPENDS

diff --git a/libc/utils/IntegrationTest/test.cpp b/libc/utils/IntegrationTest/test.cpp
@@ -0,0 +1,32 @@
+//===-- Simple malloc and free for use with integration tests -------------===//
+//
+// 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 <stddef.h>
+#include <stdint.h>
+
+// Integration tests cannot use the SCUDO standalone allocator as SCUDO pulls
+// various other parts of the libc. Since SCUDO development does not use
+// LLVM libc build rules, it is very hard to keep track or pull all that SCUDO
+// requires. Hence, as a work around for this problem, we use a simple allocator
+// which just hands out continuous blocks from a statically allocated chunk of
+// memory.
+
+static uint8_t memory[16384];
+static uint8_t *ptr = memory;
+
+extern "C" {
+
+void *malloc(size_t s) {
+  void *mem = ptr;
+  ptr += s;
+  return mem;
+}
+
+void free(void *) {}
+
+} // extern "C"
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1 @@
		file(GENERATE OUTPUT posix_spawn.test CONTENT "Hello, posix_spawn")