diff --git a/spec/features/sessions_spec.rb b/spec/features/sessions_spec.rb
index 902fd73..00364ba 100644
--- a/spec/features/sessions_spec.rb
+++ b/spec/features/sessions_spec.rb
@@ -14,8 +14,8 @@ describe "sessions" do
 
     context "sign in with exists user" do
       let(:user) { exists_user }
-      it "login success, then redirect to root_path" do
-        current_path.should == root_path
+      it "login success, then redirect to root_path, and redirect_to fluentd_path from root_path" do
+        current_path.should == fluentd_path
       end
     end
 
diff --git a/spec/models/fluentd/agent_spec.rb b/spec/models/fluentd/agent_spec.rb
index d599060..7546a00 100644
--- a/spec/models/fluentd/agent_spec.rb
+++ b/spec/models/fluentd/agent_spec.rb
@@ -59,12 +59,12 @@ describe Fluentd::Agent do
         end
 
         it "contain stack trace" do
-          subject[0].join.should include("<top (required)>")
+          subject[0][:subject].should include("Address already in use - bind(2)")
         end
 
         it "newer(bottom) is first" do
-          one = Time.parse(subject[0].first)
-          two = Time.parse(subject[1].first)
+          one = Time.parse(subject[0][:subject])
+          two = Time.parse(subject[1][:subject])
           one.should >= two
         end
       end