diff --git a/src/twisted/conch/scripts/ckeygen.py b/src/twisted/conch/scripts/ckeygen.py
index 6e2fe4c5311..525d585a257 100644
--- a/src/twisted/conch/scripts/ckeygen.py
+++ b/src/twisted/conch/scripts/ckeygen.py
@@ -208,9 +208,9 @@ def getKeyOrDefault(options):
         filename = os.path.expanduser("~/.ssh/id_rsa")
         if platform.system() == "Windows":
             filename = os.path.expandvars(R"%HOMEPATH %\.ssh\id_rsa")
-        options["filename"] = input(
-            "Enter file in which the key is (%s): " % filename
-        ) or filename
+        options["filename"] = (
+            input("Enter file in which the key is (%s): " % filename) or filename
+        )
 
 
 def printFingerprint(options):
diff --git a/src/twisted/conch/test/test_ckeygen.py b/src/twisted/conch/test/test_ckeygen.py
index 35e40fc0dd1..22545073e40 100644
--- a/src/twisted/conch/test/test_ckeygen.py
+++ b/src/twisted/conch/test/test_ckeygen.py
@@ -635,9 +635,12 @@ def test_useDefaultForKey(self):
         L{options} will default to "~/.ssh/id_rsa" if the user doesn't
         specify a key.
         """
+
         def mock_input(*args):
             return ""
+
         import builtins
+
         self.patch(builtins, "input", mock_input)
         options = {"filename": ""}
         getKeyOrDefault(options)
@@ -669,4 +672,3 @@ def test_handleBadFilePrintFingerprint(self):
         options = {"filename": "/foo/bar", "format": "md5-hex"}
         with self.assertRaises(SystemExit):
             printFingerprint(options)
-