diff --git a/Guardfile b/Guardfile
index 9ca5f49..d13a73e 100644
--- a/Guardfile
+++ b/Guardfile
@@ -6,6 +6,7 @@ end
 
 guard :rspec, cmd: 'rspec -f doc' do
   watch(%r{\Aspec/.+_spec\.rb\z})
-  watch(%r{\Alib/(.+)\.rb\z})     { |m| "spec/#{m[1]}_spec.rb" }
-  watch('spec/spec_helper.rb')    { 'spec' }
+  watch(%r{\Alib/(.+)\.rb\z})         { |m| "spec/#{m[1]}_spec.rb" }
+  watch('spec/spec_helper.rb')        { 'spec' }
+  watch(%r{\Aspec/support/.+\.rb\z})  { 'spec' }
 end