diff --git a/pkgs/development/python-modules/pyfakefs/default.nix b/pkgs/development/python-modules/pyfakefs/default.nix
index 8fac00e871e..8ba9b3fc46f 100644
--- a/pkgs/development/python-modules/pyfakefs/default.nix
+++ b/pkgs/development/python-modules/pyfakefs/default.nix
@@ -23,8 +23,6 @@ buildPythonPackage rec {
     substituteInPlace pyfakefs/tests/fake_os_test.py \
       --replace "test_path_links_not_resolved" "notest_path_links_not_resolved" \
       --replace "test_append_mode_tell_linux_windows" "notest_append_mode_tell_linux_windows"
-    substituteInPlace pyfakefs/tests/fake_filesystem_unittest_test.py \
-      --replace "test_copy_real_file" "notest_copy_real_file"
   '' + (lib.optionalString stdenv.isDarwin ''
     # this test fails on darwin due to case-insensitive file system
     substituteInPlace pyfakefs/tests/fake_os_test.py \