diff --git a/lib/guard/jasmine-headless-webkit.rb b/lib/guard/jasmine-headless-webkit.rb
index 60bcd38..c3620c2 100644
--- a/lib/guard/jasmine-headless-webkit.rb
+++ b/lib/guard/jasmine-headless-webkit.rb
@@ -22,15 +22,15 @@ module Guard
 
     def run_all
       UI.info "Guard::JasmineHeadlessWebkit running all specs..."
-      JasmineHeadlessWebkitRunner.run if run_before and run_jammit
-      @ran_jammit = false
+      JasmineHeadlessWebkitRunner.run if run_before and run_rails_assets and run_jammit
+      @ran_before = false
     end
 
     def run_on_change(paths)
       paths = filter_paths(paths)
-      @ran_jammit = false
-      if run_before and run_jammit
-        @ran_jammit = true
+      @ran_before = false
+      if run_before and run_rails_assets and run_jammit
+        @ran_before = true
         if !paths.empty?
           UI.info "Guard::JasmineHeadlessWebkit running the following: #{paths.join(' ')}"
           JasmineHeadlessWebkitRunner.run(paths)
@@ -50,16 +50,20 @@ module Guard
     end
 
     def run_before
-      if @options[:run_before]
-        run_program(@options[:run_before])
-      else
-        true
-      end
+      run_a_thing_before(:run_before, @options[:run_before])
     end
 
     def run_jammit
-      if @options[:jammit] && !@ran_jammit
-        run_program("Jammit", %{jammit -f 2>/dev/null})
+      run_a_thing_before(:jammit, "Jammit", %{jammit -f 2>/dev/null})
+    end
+
+    def run_rails_assets
+      run_a_thing_before(:rails_assets, "Rails Assets", %{rake assets:precompile:for_testing})
+    end
+
+    def run_a_thing_before(option, *args)
+      if @options[option] && !@ran_before
+        run_program(*args)
       else
         true
       end
diff --git a/spec/lib/guard/jasmine-headless-webkit_spec.rb b/spec/lib/guard/jasmine-headless-webkit_spec.rb
index 070ab00..b2b2d98 100644
--- a/spec/lib/guard/jasmine-headless-webkit_spec.rb
+++ b/spec/lib/guard/jasmine-headless-webkit_spec.rb
@@ -97,7 +97,7 @@ describe Guard::JasmineHeadlessWebkit do
   describe 'run jammit first' do
     context 'run on run_all if called first' do
       before do
-        guard.expects(:run_program).once.returns(true)
+        guard.expects(:run_program).once.with('Jammit', regexp_matches(/jammit/)).returns(true)
         Guard::JasmineHeadlessWebkitRunner.expects(:run).once
       end
 
@@ -110,7 +110,7 @@ describe Guard::JasmineHeadlessWebkit do
 
     context 'only run once if run_on_change is successful' do
       before do
-        guard.expects(:run_program).once.returns(true)
+        guard.expects(:run_program).once.with('Jammit', regexp_matches(/jammit/)).returns(true)
         Guard::JasmineHeadlessWebkitRunner.expects(:run).once.returns(0)
       end
 
@@ -121,4 +121,32 @@ describe Guard::JasmineHeadlessWebkit do
       end
     end
   end
+
+  describe 'run rails_assets first' do
+    context 'run on run_all if called first' do
+      before do
+        guard.expects(:run_program).with('Rails Assets', regexp_matches(/assets:precompile:for_testing/)).once.returns(true)
+        Guard::JasmineHeadlessWebkitRunner.expects(:run).once
+      end
+
+      let(:options) { { :rails_assets => true } }
+
+      it "should run rails assets first" do
+        guard.run_all
+      end
+    end
+
+    context 'only run once if run_on_change is successful' do
+      before do
+        guard.expects(:run_program).with('Rails Assets', regexp_matches(/assets:precompile:for_testing/)).once.returns(true)
+        Guard::JasmineHeadlessWebkitRunner.expects(:run).once.returns(0)
+      end
+
+      let(:options) { { :rails_assets => true } }
+
+      it "should run rails assets only once" do
+        guard.run_on_change(%w{path.js})
+      end
+    end
+  end
 end