diff --git a/IPython/core/tests/test_magic.py b/IPython/core/tests/test_magic.py
index 74d2604..f975076 100644
--- a/IPython/core/tests/test_magic.py
+++ b/IPython/core/tests/test_magic.py
@@ -804,7 +804,7 @@ def test_file_spaces():
     ip = get_ipython()
     with TemporaryWorkingDirectory() as td:
         fname = "file name"
-        ip.run_cell_magic("file", "'%s'"%fname, u'\n'.join([
+        ip.run_cell_magic("file", '"%s"'%fname, u'\n'.join([
             'line1',
             'line2',
         ]))