diff --git a/applications/test/copyFile/Make/files b/applications/test/copyFile/Make/files
new file mode 100644
index 0000000000..fedd5c88e3
--- /dev/null
+++ b/applications/test/copyFile/Make/files
@@ -0,0 +1,3 @@
+Test-copyFile.C
+
+EXE = $(FOAM_USER_APPBIN)/Test-copyFile
diff --git a/applications/test/copyFile/Make/options b/applications/test/copyFile/Make/options
new file mode 100644
index 0000000000..4e772fdf9d
--- /dev/null
+++ b/applications/test/copyFile/Make/options
@@ -0,0 +1,2 @@
+/* EXE_INC = -I$(LIB_SRC)/finiteVolume/lnInclude */
+/* EXE_LIBS = -lfiniteVolume */
diff --git a/applications/test/copyFile/Test-copyFile.C b/applications/test/copyFile/Test-copyFile.C
new file mode 100644
index 0000000000..7d6de05d0a
--- /dev/null
+++ b/applications/test/copyFile/Test-copyFile.C
@@ -0,0 +1,170 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2019 OpenCFD Ltd.
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+Description
+    Test atomic copyFile as per timeActivatedFileUpdate
+
+\*---------------------------------------------------------------------------*/
+
+#include "argList.H"
+#include "OSspecific.H"
+#include "Switch.H"
+
+using namespace Foam;
+
+#ifdef _WIN32
+#undef DebugInfo    // Windows name clash with OpenFOAM messageStream
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+
+// Prefix '\\?\' for extended-length path
+inline std::string longName(const std::string& file)
+{
+    std::string longName;
+    longName.reserve(4 + file.length());
+
+    longName.append("\\\\?\\");
+    longName.append(file);
+
+    return longName;
+}
+
+bool win_cp(const fileName& src, const fileName& dst)
+{
+    const std::string srcName(longName(src));
+    const std::string dstName(longName(dst));
+
+    return ::CopyFile(srcName.c_str(), dstName.c_str(), false);
+}
+
+bool win_mv(const fileName& src, const fileName& dst)
+{
+    const std::string srcName(longName(src));
+    const std::string dstName(longName(dst));
+
+    return ::MoveFile(srcName.c_str(), dstName.c_str());
+}
+
+#else
+
+bool win_cp(const fileName& src, const fileName& dst)
+{
+    Info<< "No Windows cp, using Foam::cp" << nl;
+    return Foam::cp(src, dst);
+}
+
+
+bool win_mv(const fileName& src, const fileName& dst)
+{
+    Info<< "No Windows mv, using Foam::mv" << nl;
+    return Foam::mv(src, dst);
+}
+
+#endif
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+// Main program:
+
+int main(int argc, char *argv[])
+{
+    argList::noBanner();
+    argList::noParallel();
+    argList::noFunctionObjects();
+    argList::addNote("Test atomic copyFile methods");
+
+    #ifdef _WIN32
+    argList::addBoolOption("win1", "Foam cp, Windows mv");
+    argList::addBoolOption("win2", "Windows cp, Foam mv");
+    argList::addBoolOption("win3", "Windows cp, Windows mv");
+    #endif
+
+    argList::addArgument("srcFile");
+    argList::addArgument("dstFile");
+
+    #include "setRootCase.H"
+
+    const fileName srcFile(fileName::validate(args[1]));
+    const fileName dstFile(fileName::validate(args[2]));
+    const fileName tmpFile(dstFile + Foam::name(pid()));
+
+    Info<< "src   : " << srcFile << nl
+        << "tmp   : " << tmpFile << nl
+        << "dst   : " << dstFile << nl
+        << nl;
+
+    bool cpOk = false, mvOk = false;
+
+
+    if (args.found("win1"))
+    {
+        const auto usage = argList::optionUsage.cfind("win1");
+        if (usage.good())
+        {
+            Info<< "    " << (*usage).c_str() << nl;
+        }
+
+        cpOk = Foam::cp(srcFile, tmpFile);
+        mvOk = win_mv(tmpFile, dstFile);
+    }
+    else if (args.found("win2"))
+    {
+        const auto usage = argList::optionUsage.cfind("win2");
+        if (usage.good())
+        {
+            Info<< "    " << (*usage).c_str() << nl;
+        }
+
+        cpOk = win_cp(srcFile, tmpFile);
+        mvOk = Foam::mv(tmpFile, dstFile);
+    }
+    else if (args.found("win3"))
+    {
+        const auto usage = argList::optionUsage.cfind("win3");
+        if (usage.good())
+        {
+            Info<< "    " << (*usage).c_str() << nl;
+        }
+
+        cpOk = win_cp(srcFile, tmpFile);
+        mvOk = win_mv(tmpFile, dstFile);
+    }
+    else
+    {
+        Info<< "    Foam cp, Foam mv" << nl;
+
+        cpOk = Foam::cp(srcFile, tmpFile);
+        mvOk = Foam::mv(tmpFile, dstFile);
+    }
+
+    Info<< nl
+        << "cp: " << Switch(cpOk) << nl
+        << "mv: " << Switch(mvOk) << nl;
+
+    Info<< "\nEnd\n" << endl;
+
+    return 0;
+}
+
+
+// ************************************************************************* //