diff --git a/Guardfile b/Guardfile
index c95dddc..bdc7187 100644
--- a/Guardfile
+++ b/Guardfile
@@ -7,23 +7,25 @@ guard_opts = {
   all_after_pass: true,
 }
 
-def all_specs
-  'spec'
-end
+def all_specs;      'spec'           end
+def library_specs;  'spec/libraries' end
+def provider_specs; 'spec/providers' end
 
 group :rspec do
   guard 'rspec', guard_opts do
-    watch(%r{^Gemfile$})                 { all_specs }
-    watch(%r{^Gemfile.lock$})            { all_specs }
-    watch(%r{^spec/spec_helper\.rb$})    { all_specs }
-    watch(%r{^spec/helpers/(.+)\.rb$})   { all_specs }
-    watch(%r{^spec/fixtures/(.+)\.rb$})  { all_specs }
-    watch(%r{^libraries/pacemaker\.rb$}) { all_specs }
+    watch(%r{^Gemfile$})                   { all_specs }
+    watch(%r{^Gemfile.lock$})              { all_specs }
+    watch(%r{^spec/spec_helper\.rb$})      { all_specs }
+    watch(%r{^spec/helpers/(.+)\.rb$})     { all_specs }
+    watch(%r{^spec/fixtures/(.+)\.rb$})    { all_specs }
+    watch(%r{^libraries/pacemaker\.rb$})   { all_specs }
+    watch(%r{^libraries/(.*mixin.*)\.rb$}) { library_specs }
     watch(%r{^spec/.+_spec\.rb$})
     watch(%r{^libraries/(.+)\.rb$})  { |m|
       "spec/libraries/#{m[1]}_spec.rb"
     }
-    watch(%r{^providers/common\.rb$})    { all_specs }
+    watch(%r{^providers/common\.rb$})      { provider_specs }
+    watch(%r{^providers/(.*mixin.*)\.rb$}) { provider_specs }
     watch(%r{^(resources|providers)/(.+)\.rb$}) { |m|
       "spec/providers/#{m[1]}_spec.rb"
     }