From 4a94f1b49c74703ec8063a6a7d944228c40a5103 Mon Sep 17 00:00:00 2001
From: Jacob Beel <54082169+jdbeel@users.noreply.github.com>
Date: Mon, 21 Jul 2025 10:41:30 -0400
Subject: [PATCH] Update external image renderer engine defaults

---
 plotly/io/_base_renderers.py | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/plotly/io/_base_renderers.py b/plotly/io/_base_renderers.py
index b413aee121..9d4ac1f563 100644
--- a/plotly/io/_base_renderers.py
+++ b/plotly/io/_base_renderers.py
@@ -148,7 +148,7 @@ class PngRenderer(ImageRenderer):
     mime type: 'image/png'
     """
 
-    def __init__(self, width=None, height=None, scale=None, engine="auto"):
+    def __init__(self, width=None, height=None, scale=None, engine=None):
         super(PngRenderer, self).__init__(
             mime_type="image/png",
             b64_encode=True,
@@ -170,7 +170,7 @@ class SvgRenderer(ImageRenderer):
     mime type: 'image/svg+xml'
     """
 
-    def __init__(self, width=None, height=None, scale=None, engine="auto"):
+    def __init__(self, width=None, height=None, scale=None, engine=None):
         super(SvgRenderer, self).__init__(
             mime_type="image/svg+xml",
             b64_encode=False,
@@ -192,7 +192,7 @@ class JpegRenderer(ImageRenderer):
     mime type: 'image/jpeg'
     """
 
-    def __init__(self, width=None, height=None, scale=None, engine="auto"):
+    def __init__(self, width=None, height=None, scale=None, engine=None):
         super(JpegRenderer, self).__init__(
             mime_type="image/jpeg",
             b64_encode=True,
@@ -213,7 +213,7 @@ class PdfRenderer(ImageRenderer):
     mime type: 'application/pdf'
     """
 
-    def __init__(self, width=None, height=None, scale=None, engine="auto"):
+    def __init__(self, width=None, height=None, scale=None, engine=None):
         super(PdfRenderer, self).__init__(
             mime_type="application/pdf",
             b64_encode=True,