diff --git a/IPython/utils/path.py b/IPython/utils/path.py
index 1d2c9e8..cca7a8e 100644
--- a/IPython/utils/path.py
+++ b/IPython/utils/path.py
@@ -77,7 +77,8 @@ def unquote_filename(name, win32=(sys.platform=='win32')):
     This function has been deprecated and should not be used any more:
     unquoting is now taken care of by :func:`IPython.utils.process.arg_split`.
     """
-    warn("'unquote_filename' is deprecated", DeprecationWarning)
+    warn("'unquote_filename' is deprecated since IPython 5.0 and should not "
+         "be used anymore", DeprecationWarning)
     if win32:
         if name.startswith(("'", '"')) and name.endswith(("'", '"')):
             name = name[1:-1]
@@ -98,18 +99,13 @@ def get_py_filename(name, force_win32=None):
 
     If the given name is not a file, it adds '.py' and searches again.
     Raises IOError with an informative message if the file isn't found.
-
-    On Windows, apply Windows semantics to the filename. In particular, remove
-    any quoting that has been applied to it. This option can be forced for
-    testing purposes.
     """
 
     name = os.path.expanduser(name)
-    if force_win32 is None:
-        win32 = (sys.platform == 'win32')
-    else:
-        win32 = force_win32
-    name = unquote_filename(name, win32=win32)
+    if force_win32 is not None:
+        warn("The 'force_win32' argument to 'get_py_filename' is deprecated "
+             "since IPython 5.0 and should not be used anymore",
+            DeprecationWarning)
     if not os.path.isfile(name) and not name.endswith('.py'):
         name += '.py'
     if os.path.isfile(name):
diff --git a/IPython/utils/tests/test_path.py b/IPython/utils/tests/test_path.py
index 2378e51..4aba13f 100644
--- a/IPython/utils/tests/test_path.py
+++ b/IPython/utils/tests/test_path.py
@@ -305,25 +305,20 @@ def test_not_writable_ipdir():
 @with_environment
 def test_get_py_filename():
     os.chdir(TMP_TEST_DIR)
-    for win32 in (True, False):
-        with make_tempfile('foo.py'):
-            nt.assert_equal(path.get_py_filename('foo.py', force_win32=win32), 'foo.py')
-            nt.assert_equal(path.get_py_filename('foo', force_win32=win32), 'foo.py')
-        with make_tempfile('foo'):
-            nt.assert_equal(path.get_py_filename('foo', force_win32=win32), 'foo')
-            nt.assert_raises(IOError, path.get_py_filename, 'foo.py', force_win32=win32)
-        nt.assert_raises(IOError, path.get_py_filename, 'foo', force_win32=win32)
-        nt.assert_raises(IOError, path.get_py_filename, 'foo.py', force_win32=win32)
-        true_fn = 'foo with spaces.py'
-        with make_tempfile(true_fn):
-            nt.assert_equal(path.get_py_filename('foo with spaces', force_win32=win32), true_fn)
-            nt.assert_equal(path.get_py_filename('foo with spaces.py', force_win32=win32), true_fn)
-            if win32:
-                nt.assert_equal(path.get_py_filename('"foo with spaces.py"', force_win32=True), true_fn)
-                nt.assert_equal(path.get_py_filename("'foo with spaces.py'", force_win32=True), true_fn)
-            else:
-                nt.assert_raises(IOError, path.get_py_filename, '"foo with spaces.py"', force_win32=False)
-                nt.assert_raises(IOError, path.get_py_filename, "'foo with spaces.py'", force_win32=False)
+    with make_tempfile('foo.py'):
+        nt.assert_equal(path.get_py_filename('foo.py'), 'foo.py')
+        nt.assert_equal(path.get_py_filename('foo'), 'foo.py')
+    with make_tempfile('foo'):
+        nt.assert_equal(path.get_py_filename('foo'), 'foo')
+        nt.assert_raises(IOError, path.get_py_filename, 'foo.py')
+    nt.assert_raises(IOError, path.get_py_filename, 'foo')
+    nt.assert_raises(IOError, path.get_py_filename, 'foo.py')
+    true_fn = 'foo with spaces.py'
+    with make_tempfile(true_fn):
+        nt.assert_equal(path.get_py_filename('foo with spaces'), true_fn)
+        nt.assert_equal(path.get_py_filename('foo with spaces.py'), true_fn)
+        nt.assert_raises(IOError, path.get_py_filename, '"foo with spaces.py"')
+        nt.assert_raises(IOError, path.get_py_filename, "'foo with spaces.py'")
 
 @onlyif_unicode_paths
 def test_unicode_in_filename():