diff --git a/ufmt/core.py b/ufmt/core.py
index 548159c..e2ab1d6 100644
--- a/ufmt/core.py
+++ b/ufmt/core.py
@@ -150,7 +150,7 @@ def ufmt_bytes(
                 mode=black_config,
             )
         except black.report.NothingChanged:
-            content = result.output
+            pass
     elif ufmt_config.formatter == Formatter.ruff_api:
         ruff_format_options = ruff_api.FormatOptions(
             target_version=str(
diff --git a/ufmt/tests/core.py b/ufmt/tests/core.py
index 7cb75a3..f45592f 100644
--- a/ufmt/tests/core.py
+++ b/ufmt/tests/core.py
@@ -255,6 +255,16 @@ def test_ufmt_bytes_alternate_sorter(
             )
             ruff_mock.assert_not_called()
 
+            result = ufmt.ufmt_bytes(
+                Path("foo.py"),
+                CORRECTLY_FORMATTED_CODE.encode(),
+                ufmt_config=UfmtConfig(sorter=Sorter.skip),
+                black_config=black_config,
+                usort_config=usort_config,
+            )
+            expected = CORRECTLY_FORMATTED_CODE
+            self.assertEqual(expected.encode(), result)
+
         with self.subTest("ruff-api"):
             usort_mock.reset_mock()
             result = ufmt.ufmt_bytes(
@@ -270,6 +280,16 @@ def test_ufmt_bytes_alternate_sorter(
                 "foo.py", POORLY_FORMATTED_CODE, options=ANY, root=None
             )
 
+            result = ufmt.ufmt_bytes(
+                Path("foo.py"),
+                CORRECTLY_FORMATTED_CODE.encode(),
+                ufmt_config=UfmtConfig(sorter=Sorter.skip),
+                black_config=black_config,
+                usort_config=usort_config,
+            )
+            expected = CORRECTLY_FORMATTED_CODE
+            self.assertEqual(expected.encode(), result)
+
         with self.subTest("skip"):
             usort_mock.reset_mock()
             result = ufmt.ufmt_bytes(
@@ -283,6 +303,16 @@ def test_ufmt_bytes_alternate_sorter(
             self.assertEqual(expected.encode(), result)
             usort_mock.assert_not_called()
 
+            result = ufmt.ufmt_bytes(
+                Path("foo.py"),
+                CORRECTLY_FORMATTED_CODE.encode(),
+                ufmt_config=UfmtConfig(sorter=Sorter.skip),
+                black_config=black_config,
+                usort_config=usort_config,
+            )
+            expected = CORRECTLY_FORMATTED_CODE
+            self.assertEqual(expected.encode(), result)
+
         with self.subTest("unsupported sorter"):
             with self.assertRaisesRegex(
                 ValueError, "'garbage' is not a supported sorter"