diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index c334601d..f945255d 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -124,6 +124,13 @@ if(UNIX AND NOT SUBPROJECT)
       set_target_properties(test_extra_crunched_delete PROPERTIES
         CXX_STANDARD ${MDBX_CXX_STANDARD} CXX_STANDARD_REQUIRED ON)
     endif()
+    add_executable(test_extra_dbi extra/dbi.c++)
+    target_include_directories(test_extra_dbi PRIVATE "${PROJECT_SOURCE_DIR}")
+    target_link_libraries(test_extra_dbi ${TOOL_MDBX_LIB})
+    if(MDBX_CXX_STANDARD)
+      set_target_properties(test_extra_dbi PROPERTIES
+        CXX_STANDARD ${MDBX_CXX_STANDARD} CXX_STANDARD_REQUIRED ON)
+    endif()
   endif()
 endif()
 
diff --git a/test/extra/dbi.c++ b/test/extra/dbi.c++
new file mode 100644
index 00000000..86dd0c4d
--- /dev/null
+++ b/test/extra/dbi.c++
@@ -0,0 +1,41 @@
+#include "mdbx.h++"
+
+#include <iostream>
+
+static char log_buffer[1024];
+
+static void logger_nofmt(MDBX_log_level_t loglevel, const char *function,
+                         int line, const char *msg, unsigned length) noexcept {
+  (void)length;
+  (void)loglevel;
+  fprintf(stdout, "%s:%u %s", function, line, msg);
+}
+
+int main(int argc, const char *argv[]) {
+  (void)argc;
+  (void)argv;
+
+  mdbx_setup_debug_nofmt(MDBX_LOG_NOTICE, MDBX_DBG_ASSERT, logger_nofmt,
+                         log_buffer, sizeof(log_buffer));
+
+  mdbx::path path = "test-dbi";
+  mdbx::env::remove(path);
+
+  mdbx::env::operate_parameters operateParameters(100, 10);
+  mdbx::env_managed::create_parameters createParameters;
+  {
+    mdbx::env_managed env2(path, createParameters, operateParameters);
+    mdbx::txn_managed txn2 = env2.start_write(false);
+    /* mdbx::map_handle testHandle2 = */ txn2.create_map(
+        "fap1", mdbx::key_mode::reverse, mdbx::value_mode::single);
+    txn2.commit();
+  }
+  mdbx::env_managed env(path, createParameters, operateParameters);
+  mdbx::txn_managed txn = env.start_write(false);
+  /* mdbx::map_handle testHandle = */ txn.create_map(
+      "fap1", mdbx::key_mode::usual, mdbx::value_mode::single);
+  txn.commit();
+
+  std::cout << "OK\n";
+  return EXIT_SUCCESS;
+}