From: Daniel Leidert <dleidert@debian.org>
Date: Sat, 29 Feb 2020 14:33:11 +0100
Subject: Disable image test requiring network access

This test fails in environments without internet access:
Error: test_image_file(TestImage): SocketError: Failed to open TCP connection to via.placeholder.com:443 (getaddrinfo: Temporary failure in name resolution)
---
 test/test_image.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/test/test_image.rb
+++ b/test/test_image.rb
@@ -68,7 +68,7 @@
     end
   end
 
-  def test_image_file
+  def __test_image_file
     assert_equal(@tester.file.class.name, 'File')
   end