diff --git a/rattail/files.py b/rattail/files.py
index 4956aca487bea5f069fdb487845baad304e79b75..f63da541d0d892082582f256a369b73ec824808a 100644
--- a/rattail/files.py
+++ b/rattail/files.py
@@ -35,6 +35,7 @@ import shutil
 import lockfile
 import tempfile
 import errno
+import warnings
 from datetime import datetime
 
 import pkg_resources
@@ -77,46 +78,7 @@ def creation_time(path):
     return datetime.fromtimestamp(time)
 
 
-def locking_copy(src, dst, timeout=None):
-    """
-    Implements a "locking" version of the standard library's
-    :func:`python:shutil.copy()` function.
-
-    This exists to provide a more atomic method for copying a file into a
-    folder which is being watched by a file monitor.  The assumption is that
-    the monitor is configured to watch for file "locks" and therefore only
-    process files once they have had their locks removed.  See also
-    :ref:`filemon-profile-watchlocks`.
-
-    :param src: Path to the source file.
-    :type src: string
-
-    :param dst: Path to the destination file (or directory).
-    :type dst: string
-
-    :type timeout: float
-    :param timeout: Number of seconds to wait for the file lock to clear, if it
-       already exists.  This value may be specified as an integer or float, or
-       string (which will be coerced to a float).
-
-       .. note::
-          There is no default value for the timeout, which means that by
-          default, the function will wait indefinitely for the lock to clear.
-    """
-    # Coerce timeout to float in case it isn't already, e.g. in the case of
-    # being called as a filemon action.
-    if timeout is not None:
-        timeout = float(timeout)
-
-    if os.path.isdir(dst):
-        fn = os.path.basename(src)
-        dst = os.path.join(dst, fn)
-
-    with lockfile.LockFile(dst, timeout=timeout):
-        shutil.copy(src, dst)
-
-
-def locking_copy_test(src, destdir):
+def locking_copy(src, destdir, timeout=None):
     """
     Implements a "locking" version of the standard library's
     :func:`python:shutil.copy()` function.
@@ -133,6 +95,11 @@ def locking_copy_test(src, destdir):
     :param destdir: Path to the destination directory.
     :type destdir: string
     """
+    # TODO: Remove the timeout arg altogether.
+    if timeout is not None:
+        warnings.warn("The 'timeout' arg is deprecated and will be ignored.",
+                      DeprecationWarning)
+
     fn = os.path.basename(src)
     dst = os.path.join(destdir, fn)
     lockdir = '{0}.lock'.format(dst)