diff --git a/test/osal-unix.cc b/test/osal-unix.cc
index 6661ae42..1856d0f8 100644
--- a/test/osal-unix.cc
+++ b/test/osal-unix.cc
@@ -1,4 +1,4 @@
-/*
+/*
  * Copyright 2017-2018 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
@@ -301,3 +301,7 @@ std::string osal_tempdir(void) {
     return "/dev/shm/";
   return "";
 }
+
+int osal_removefile(const std::string &pathname) {
+  return unlink(pathname.c_str()) ? errno : MDBX_SUCCESS;
+}
diff --git a/test/osal-windows.cc b/test/osal-windows.cc
index 7d59f657..f7f1de56 100644
--- a/test/osal-windows.cc
+++ b/test/osal-windows.cc
@@ -1,4 +1,4 @@
-/*
+/*
  * Copyright 2017-2018 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
@@ -405,3 +405,7 @@ std::string osal_tempdir(void) {
   DWORD len = GetTempPathA(sizeof(buf), buf);
   return std::string(buf, len);
 }
+
+int osal_removefile(const std::string &pathname) {
+  return DeleteFileA(pathname.c_str()) ? MDBX_SUCCESS : GetLastError();
+}
diff --git a/test/osal.h b/test/osal.h
index c27282a6..3ccc7bbe 100644
--- a/test/osal.h
+++ b/test/osal.h
@@ -1,4 +1,4 @@
-/*
+/*
  * Copyright 2017-2018 Leonid Yuriev <leo@yuriev.ru>
  * and other libmdbx authors: please see AUTHORS file.
  * All rights reserved.
@@ -32,6 +32,7 @@ void osal_udelay(unsigned us);
 void osal_yield(void);
 bool osal_istty(int fd);
 std::string osal_tempdir(void);
+int osal_removefile(const std::string &pathname);
 
 #ifdef _MSC_VER
 #ifndef STDIN_FILENO