Analyse following RPM build log snippet. Describe contents accurately, without speculation or suggestions for resolution.            
Your analysis must be as concise as possible, while keeping relevant information intact.
Snippet: 
/builddir/build/BUILD/webmock-3.18.1/usr/share/gems/gems/webmock-3.18.1/minitest/test_helper.rb:13:in `<top (required)>': uninitialized constant MiniTest (NameError)

test_class = defined?(MiniTest::Test) ? MiniTest::Test : MiniTest::Unit::TestCase
                                                         ^^^^^^^^
Did you mean?  Minitest
	from <internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:127:in `require'
	from <internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:127:in `require'
	from <internal:dir>:411:in `glob'
	from -e:1:in `<main>'
The compilation of a test file (because we are in the %check section) failed here, claiming that the `MiniTest` ruby package doesn't exist.