diff --git a/rubygem-haml.spec b/rubygem-haml.spec
index 073beec..6e2aaff 100644
--- a/rubygem-haml.spec
+++ b/rubygem-haml.spec
@@ -3,7 +3,7 @@
 
 Name: rubygem-%{gem_name}
 Version: 5.0.1
-Release: 1%{?dist}
+Release: 2%{?dist}
 Summary: An elegant, structured (X)HTML/XML templating engine
 License: MIT and WTFPL
 URL: http://haml.info/
@@ -69,7 +69,11 @@ tar xzvf %{SOURCE1}
 # Get rid of Bundler.
 sed -i '/bundler/ s/^/#/' test/test_helper.rb
 
-ruby -Ilib:test -e 'Dir.glob "./test/**/*_test.rb", &method(:require)'
+# options_test.rb must be executed in isolation in order to prevent load
+# order issues.
+# https://github.com/haml/haml/issues/943
+ruby -Ilib:test -e '(Dir.glob("./test/*_test.rb") - %w[./test/options_test.rb]).each {|f| require f }'
+ruby -Ilib:test -e 'require "./test/options_test.rb"'
 popd
 
 %files
@@ -97,6 +101,9 @@ popd
 %{gem_instdir}/yard
 
 %changelog
+* Wed Jul 19 2017 Vít Ondruch <vondruch@redhat.com> - 5.0.1-2
+- options_test.rb must be executed in isolation.
+
 * Tue Jul 18 2017 Vít Ondruch <vondruch@redhat.com> - 5.0.1-1
 - Update to Haml 5.0.1.