diff --git a/test/osal-windows.cc b/test/osal-windows.cc
index 81f1da7f..7d59f657 100644
--- a/test/osal-windows.cc
+++ b/test/osal-windows.cc
@@ -262,12 +262,18 @@ int osal_actor_start(const actor_config &config, mdbx_pid_t &pid) {
   STARTUPINFOA StartupInfo;
   GetStartupInfoA(&StartupInfo);
 
-  char exename[_MAX_PATH];
+  char exename[_MAX_PATH + 1];
   DWORD exename_size = sizeof(exename);
   if (!QueryFullProcessImageNameA(GetCurrentProcess(), 0, exename,
                                   &exename_size))
     failure_perror("QueryFullProcessImageName()", GetLastError());
 
+  if (exename[1] != ':') {
+    exename_size = GetModuleFileName(NULL, exename, sizeof(exename));
+    if (exename_size >= sizeof(exename))
+      return ERROR_BAD_LENGTH;
+  }
+
   std::string cmdline = "$ ";
   ArgvQuote(cmdline, thunk_param(config));
 
@@ -283,7 +289,7 @@ int osal_actor_start(const actor_config &config, mdbx_pid_t &pid) {
                       NULL, // Inherit the parent's environment.
                       NULL, // Inherit the parent's current directory.
                       &StartupInfo, &ProcessInformation))
-    return GetLastError();
+    failure_perror(exename, GetLastError());
 
   CloseHandle(ProcessInformation.hThread);
   pid = ProcessInformation.dwProcessId;