diff --git a/libmdbx.files b/libmdbx.files
index 38125146..653b0397 100644
--- a/libmdbx.files
+++ b/libmdbx.files
@@ -3,6 +3,7 @@ README-RU.md
 pcrf_test/CMakeLists.txt
 src/tools/CMakeLists.txt
 test/CMakeLists.txt
+test/copy.cc
 tutorial/CMakeLists.txt
 tutorial/sample-mdbx.c
 AUTHORS
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 3ed01bdd..ca7dd794 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -1,34 +1,35 @@
-set(TARGET mdbx_test)
+set(TARGET mdbx_test)
 project(${TARGET})
 
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-missing-declarations")
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-cast-qual")
 
 add_executable(${TARGET}
-        base.h
-        cases.cc
-        chrono.cc
-        chrono.h
-        config.cc
-        config.h
-        dead.cc
-        hill.cc
-        jitter.cc
-        keygen.cc
-        keygen.h
-        log.cc
-        log.h
-        main.cc
-        osal.h
-        osal-unix.cc
-        test.cc
-        test.h
-        try.cc
-        utils.cc
-        utils.h
-)
+  base.h
+  cases.cc
+  chrono.cc
+  chrono.h
+  config.cc
+  config.h
+  copy.cc
+  dead.cc
+  hill.cc
+  jitter.cc
+  keygen.cc
+  keygen.h
+  log.cc
+  log.h
+  main.cc
+  osal.h
+  osal-unix.cc
+  test.cc
+  test.h
+  try.cc
+  utils.cc
+  utils.h
+  )
 
 target_link_libraries(${TARGET}
-        mdbx
-        )
+  mdbx
+  )
 
diff --git a/test/cases.cc b/test/cases.cc
index 4f4306d5..13d47576 100644
--- a/test/cases.cc
+++ b/test/cases.cc
@@ -1,4 +1,4 @@
-/*
+/*
  * Copyright 2017-2018 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
@@ -68,6 +68,7 @@ void testcase_setup(const char *casename, actor_params &params,
     configure_actor(last_space_id, ac_jitter, nullptr, params);
     configure_actor(last_space_id, ac_hill, nullptr, params);
     configure_actor(last_space_id, ac_try, nullptr, params);
+    configure_actor(last_space_id, ac_copy, nullptr, params);
     log_notice("<<< testcase_setup(%s): done", casename);
   } else {
     failure("unknown testcase `%s`", casename);
diff --git a/test/config.h b/test/config.h
index 2d0fede0..1886a8ea 100644
--- a/test/config.h
+++ b/test/config.h
@@ -1,4 +1,4 @@
-/*
+/*
  * Copyright 2017-2018 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
@@ -26,7 +26,8 @@ enum actor_testcase {
   ac_deadread,
   ac_deadwrite,
   ac_jitter,
-  ac_try
+  ac_try,
+  ac_copy
 };
 
 enum actor_status {
diff --git a/test/copy.cc b/test/copy.cc
new file mode 100644
index 00000000..e239d41e
--- /dev/null
+++ b/test/copy.cc
@@ -0,0 +1,26 @@
+#include "test.h"
+
+void testcase_copy::copy_db(const bool with_compaction) {
+  int err = osal_removefile(copy_pathname);
+  if (err != MDBX_SUCCESS && err != MDBX_ENOFILE)
+    failure_perror("mdbx_removefile()", err);
+
+  err = mdbx_env_copy(db_guard.get(), copy_pathname.c_str(),
+                      with_compaction ? MDBX_CP_COMPACT : 0);
+  if (unlikely(err != MDBX_SUCCESS))
+    failure_perror(with_compaction ? "mdbx_env_copy(MDBX_CP_COMPACT)"
+                                   : "mdbx_env_copy(MDBX_CP_ASIS)",
+                   err);
+}
+
+bool testcase_copy::run() {
+  jitter_delay();
+  db_open();
+  assert(!txn_guard);
+  const bool order = flipcoin();
+  jitter_delay();
+  copy_db(order);
+  jitter_delay();
+  copy_db(!order);
+  return true;
+}
diff --git a/test/main.cc b/test/main.cc
index ad30f5ce..275b7b13 100644
--- a/test/main.cc
+++ b/test/main.cc
@@ -1,4 +1,4 @@
-/*
+/*
  * Copyright 2017-2018 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
@@ -337,6 +337,10 @@ int main(int argc, char *const argv[]) {
       configure_actor(last_space_id, ac_deadwrite, value, params);
       continue;
     }
+    if (config::parse_option(argc, argv, narg, "copy", nullptr)) {
+      configure_actor(last_space_id, ac_copy, value, params);
+      continue;
+    }
     if (config::parse_option(argc, argv, narg, "failfast",
                              global::config::failfast))
       continue;
diff --git a/test/test.cc b/test/test.cc
index b9663c2a..6bba425a 100644
--- a/test/test.cc
+++ b/test/test.cc
@@ -1,4 +1,4 @@
-/*
+/*
  * Copyright 2017-2018 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
@@ -31,6 +31,8 @@ const char *testcase2str(const actor_testcase testcase) {
     return "jitter";
   case ac_try:
     return "try";
+  case ac_copy:
+    return "copy";
   }
 }
 
@@ -453,6 +455,9 @@ bool test_execute(const actor_config &config) {
     case ac_try:
       test.reset(new testcase_try(config, pid));
       break;
+    case ac_copy:
+      test.reset(new testcase_copy(config, pid));
+      break;
     default:
       test.reset(new testcase(config, pid));
       break;
diff --git a/test/test.h b/test/test.h
index 0de4b480..d145ec2e 100644
--- a/test/test.h
+++ b/test/test.h
@@ -185,3 +185,14 @@ public:
       : testcase(config, pid) {}
   bool run();
 };
+
+class testcase_copy : public testcase {
+  const std::string copy_pathname;
+  void copy_db(const bool with_compaction);
+
+public:
+  testcase_copy(const actor_config &config, const mdbx_pid_t pid)
+      : testcase(config, pid),
+        copy_pathname(config.params.pathname_db + "-copy") {}
+  bool run();
+};
diff --git a/test/test.vcxproj b/test/test.vcxproj
index 74cdf857..b47bc7a8 100644
--- a/test/test.vcxproj
+++ b/test/test.vcxproj
@@ -184,6 +184,7 @@
     <ClCompile Include="cases.cc" />
     <ClCompile Include="chrono.cc" />
     <ClCompile Include="config.cc" />
+    <ClCompile Include="copy.cc" />
     <ClCompile Include="dead.cc" />
     <ClCompile Include="hill.cc" />
     <ClCompile Include="try.cc" />