https://github.com/minimagick/minimagick/issues/590
https://github.com/minimagick/minimagick/pull/591
https://github.com/minimagick/minimagick/commit/7f25f72f7b2d11954a8d300dbba1208611eb25fb

From 7f25f72f7b2d11954a8d300dbba1208611eb25fb Mon Sep 17 00:00:00 2001
From: sorenstoutner <soren@stoutner.com>
Date: Fri, 21 Mar 2025 05:57:02 -0700
Subject: [PATCH] Fix testing with current versions of ImageMagick (#591)

--- a/spec/lib/mini_magick/shell_spec.rb
+++ b/spec/lib/mini_magick/shell_spec.rb
@@ -57,7 +57,7 @@
       stdout, stderr, status = subject.execute(%W[identify foo])
 
       expect(stdout).to eq ""
-      expect(stderr).to match("unable to open image")
+      expect(stderr).to match("(unable to open image|identify: no decode delegate for this image format)")
       expect(status).to eq 1
     end