diff --git a/subprocess.hpp b/subprocess.hpp
index 16b1ab6..62cfa92 100755
--- a/subprocess.hpp
+++ b/subprocess.hpp
@@ -1535,7 +1535,7 @@ inline void Popen::execute_process() noexcept(false)
   ZeroMemory(&siStartInfo, sizeof(STARTUPINFOW));
   siStartInfo.cb = sizeof(STARTUPINFOW);
 
-  siStartInfo.hStdError = this->stream_.g_hChildStd_OUT_Wr;
+  siStartInfo.hStdError = this->stream_.g_hChildStd_ERR_Wr;
   siStartInfo.hStdOutput = this->stream_.g_hChildStd_OUT_Wr;
   siStartInfo.hStdInput = this->stream_.g_hChildStd_IN_Rd;
 
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index ffc4eab..f61e5d2 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -19,3 +19,17 @@ foreach(test_file IN LISTS test_files)
         COPYONLY
     )
 endforeach()
+
+
+set(TEST_REDIRECTION_PYTHON_SCRIPT_PATH ${CMAKE_CURRENT_SOURCE_DIR}/test_redirection.py)
+configure_file(
+    ${CMAKE_CURRENT_SOURCE_DIR}/test_redirection.cc.in
+    ${CMAKE_CURRENT_BINARY_DIR}/test_redirection.cc
+    @ONLY
+)
+add_executable(test_redirection ${CMAKE_CURRENT_BINARY_DIR}/test_redirection.cc)
+target_link_libraries(test_redirection PRIVATE subprocess)
+add_test(
+    NAME test_redirection
+    COMMAND $<TARGET_FILE:test_redirection>
+)
diff --git a/test/test_redirection.cc.in b/test/test_redirection.cc.in
new file mode 100644
index 0000000..787ecc9
--- /dev/null
+++ b/test/test_redirection.cc.in
@@ -0,0 +1,23 @@
+#include <subprocess.hpp>
+
+#include <cstdlib>
+#include <string>
+#include <tuple>
+
+using namespace subprocess;
+
+int main() {
+  auto p = Popen("python3 @TEST_REDIRECTION_PYTHON_SCRIPT_PATH@", output{PIPE}, error{PIPE});
+  OutBuffer out_buf;
+  ErrBuffer err_buf;
+  std::tie(out_buf, err_buf) = p.communicate();
+  std::string out{out_buf.buf.data()};
+  std::string err{err_buf.buf.data()};
+
+  if (out.find("Hello message.") == std::string::npos) return EXIT_FAILURE;
+  if (err.find("Hello message.") != std::string::npos) return EXIT_FAILURE;
+  if (out.find("Error report.") != std::string::npos) return EXIT_FAILURE;
+  if (err.find("Error report.") == std::string::npos) return EXIT_FAILURE;
+
+  return EXIT_SUCCESS;
+}
diff --git a/test/test_redirection.py b/test/test_redirection.py
new file mode 100755
index 0000000..afa9d88
--- /dev/null
+++ b/test/test_redirection.py
@@ -0,0 +1,7 @@
+#!/usr/bin/env python3
+
+import sys
+
+if __name__ == "__main__":
+    print("Hello message.")
+    print("Error report.", file=sys.stderr)