1 files changed, 5 insertions, 2 deletions
diff --git a/mobly/controllers/android_device_lib/jsonrpc_shell_base.py b/mobly/controllers/android_device_lib/jsonrpc_shell_base.py
index 3129f59..c6d395b 100755
--- a/mobly/controllers/android_device_lib/jsonrpc_shell_base.py
+++ b/mobly/controllers/android_device_lib/jsonrpc_shell_base.py
@@ -59,8 +59,11 @@ class JsonRpcShellBase:
       elif len(serials) == 1:
         serial = serials[0]
       else:
-        raise Error('Expected one phone, but %d found. Use the -s flag or '
-                    'specify ANDROID_SERIAL.' % len(serials))
+        raise Error(
+            'Expected one phone, but %d found. Use the -s flag or '
+            'specify ANDROID_SERIAL.'
+            % len(serials)
+        )
     if serial not in serials:
       raise Error('Device "%s" is not found by adb.' % serial)
     ads = android_device.get_instances([serial])