diff --git a/Formula/portable-ruby.rb b/Formula/portable-ruby.rb
index 0761f3c..b4f2901 100644
--- a/Formula/portable-ruby.rb
+++ b/Formula/portable-ruby.rb
@@ -164,7 +164,7 @@ def install
       shell_output("#{ruby} -rzlib -e 'puts Zlib.crc32(\"test\")'").chomp
     assert_equal " \t\n`><=;|&{(",
       shell_output("#{ruby} -rreadline -e 'puts Readline.basic_word_break_characters'").chomp
-    assert_equal '{"a"=>"b"}',
+    assert_equal '{"a" => "b"}',
       shell_output("#{ruby} -ryaml -e 'puts YAML.load(\"a: b\")'").chomp
     assert_equal "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
       shell_output("#{ruby} -ropenssl -e 'puts OpenSSL::Digest::SHA256.hexdigest(\"\")'").chomp