diff --git a/src/pip/_internal/cli/cmdoptions.py b/src/pip/_internal/cli/cmdoptions.py
index 2d07d5bcc..a09ccee65 100644
--- a/src/pip/_internal/cli/cmdoptions.py
+++ b/src/pip/_internal/cli/cmdoptions.py
@@ -309,10 +309,12 @@ cert = partial(
     dest='cert',
     type='path',
     metavar='path',
-    help="Path to PEM-encoded CA certificate bundle. "
-         "If provided, overrides the default. "
-         "See 'SSL Certificate Verification' in pip documentation "
-         "for more information.",
+    help=(
+        "Path to PEM-encoded CA certificate bundle. "
+        "If provided, overrides the default. "
+        "See 'SSL Certificate Verification' in pip documentation "
+        "for more information."
+    ),
 )  # type: Callable[..., Option]
 
 client_cert = partial(