diff --git a/pre_commit_hooks/mixed_line_ending.py b/pre_commit_hooks/mixed_line_ending.py
index 21f6b2f..0beab60 100644
--- a/pre_commit_hooks/mixed_line_ending.py
+++ b/pre_commit_hooks/mixed_line_ending.py
@@ -1,5 +1,4 @@
 import argparse
-import os
 import re
 import sys
 
@@ -56,8 +55,6 @@ def mixed_line_ending(argv=None):
     filenames = options['filenames']
     fix_option = options['fix']
 
-    _check_filenames(filenames)
-
     if fix_option == MixedLineEndingOption.NO:
         return _process_no_fix(filenames)
     elif fix_option == MixedLineEndingOption.AUTO:
@@ -92,12 +89,6 @@ def _parse_arguments(argv=None):
     return options
 
 
-def _check_filenames(filenames):
-    for filename in filenames:
-        if not os.path.isfile(filename):
-            raise IOError('The file "{}" does not exist'.format(filename))
-
-
 def _detect_line_ending(filename):
     with open(filename, 'rb') as f:
         buf = f.read()
diff --git a/tests/mixed_line_ending_test.py b/tests/mixed_line_ending_test.py
index b2ac90a..9b49b5e 100644
--- a/tests/mixed_line_ending_test.py
+++ b/tests/mixed_line_ending_test.py
@@ -152,8 +152,3 @@ def test_mixed_line_ending_fix_force_crlf(
 
     assert ret == expected_retval
     assert path.read_binary() == output
-
-
-def test_check_filenames():
-    with pytest.raises(IOError):
-        mixed_line_ending(['/dev/null'])