diff --git a/.github/chatops_commands.md b/.github/chatops_commands.md
new file mode 100644
index 0000000000..d9f0408676
--- /dev/null
+++ b/.github/chatops_commands.md
@@ -0,0 +1,6 @@
+- :ok_woman: `/approve` - approve
+- :love_letter: `/changelog` - add changelog comment
+- :bento: `/format` - format codes and add licenses
+- :white_check_mark: `/gen-test` - generate test codes
+- :label: `/label` - add labels
+- :rewind: `/rebase` - rebase master
diff --git a/.github/workflows/chatops-help.yml b/.github/workflows/chatops-help.yml
new file mode 100644
index 0000000000..6ed7e02d49
--- /dev/null
+++ b/.github/workflows/chatops-help.yml
@@ -0,0 +1,24 @@
+name: "ChatOps help"
+on:
+  pull_request:
+    types: [opened]
+jobs:
+  print-help:
+    name: print help
+    runs-on: ubuntu-latest
+    steps:
+      - name: comment to PR
+        run: |
+          curl -o chatops_commands.md https://raw.githubusercontent.com/vdaas/vald/master/.github/chatops_commands.md
+          BODY=`cat chatops_commands.md | sed ':a;N;$!ba;s/\n/\\\\n/g'`
+          curl --include --verbose --fail \
+          -H "Accept: application/json" \
+          -H "Content-Type:application/json" \
+          -H "Authorization: token ${GITHUB_TOKEN}" \
+          --request POST \
+          --data "{\"body\": \"**[CHATOPS:HELP]** ChatOps commands.\\n${BODY}\"}" \
+          $API_URL
+        env:
+          GITHUB_TOKEN: ${{ secrets.DISPATCH_TOKEN }}
+          API_URL: ${{ github.event.pull_request.comments_url }}
+          PR_NUM: ${{ github.event.issue.number }}
diff --git a/.github/workflows/chatops.yml b/.github/workflows/chatops.yml
index c9d24f9b3d..f7b9c87ac2 100644
--- a/.github/workflows/chatops.yml
+++ b/.github/workflows/chatops.yml
@@ -8,6 +8,7 @@ jobs:
   label:
     name: Add labels
     runs-on: ubuntu-latest
+    if: steps.check_comments_label.outputs.COMMENTER_USERNAME != 'vdaas-ci'
     steps:
       - name: check PR Comments
         id: check_comments_label
@@ -60,6 +61,7 @@ jobs:
   changelog:
     name: Add draft comment for a new CHANGELOG entry
     runs-on: ubuntu-latest
+    if: steps.check_comments_label.outputs.COMMENTER_USERNAME != 'vdaas-ci'
     steps:
       - name: check PR Comments
         id: check_comments_changelog
@@ -102,7 +104,7 @@ jobs:
         run: |
           git checkout master
           PREVIOUS_VERSION=$(git describe --tags $(git rev-list --tags --max-count=1))
-          BODY=`git log --pretty=format:'- %s' ${PREVIOUS_VERSION}..master | grep "#[[:digit:]]\+" | sed -e "s/\[\(patch\|minor\|major\)\] *//g" | sed -e "s%#\([[:digit:]]\+\)%[&](https://github.com/vdaas/vald/pull/\1)%" | sed ':a;N;$!ba;s/\n/\\\\n/g'`
+          BODY=`git log --pretty=format:'- %s' ${PREVIOUS_VERSION}..master | grep "#[[:digit:]]\+" | sed -e "s/\[\(patch\|minor\|major\)\] *//g" | sed -e "s%#\([[:digit:]]\+\)%[&](https://github.com/vdaas/vald/pull/\1)%g" | sed ':a;N;$!ba;s/\n/\\\\n/g'`
           CURRENT="- ${PR_TITLE} ([#${PR_NUM}](https://github.com/vdaas/vald/pull/${PR_NUM}))"
           curl --include --verbose --fail \
           -H "Accept: application/json" \
@@ -119,6 +121,7 @@ jobs:
   rebase:
     name: Rebase
     runs-on: ubuntu-latest
+    if: steps.check_comments_label.outputs.COMMENTER_USERNAME != 'vdaas-ci'
     steps:
       - name: check PR Comments
         id: check_comments_rebase
@@ -192,6 +195,7 @@ jobs:
     needs:
       - rebase
     runs-on: ubuntu-latest
+    if: steps.check_comments_label.outputs.COMMENTER_USERNAME != 'vdaas-ci'
     steps:
       - name: check PR Comments
         id: check_comments_gen_test
@@ -298,6 +302,7 @@ jobs:
       - rebase
       - gentest
     runs-on: ubuntu-latest
+    if: steps.check_comments_label.outputs.COMMENTER_USERNAME != 'vdaas-ci'
     steps:
       - name: check PR Comments
         id: check_comments_format
@@ -428,6 +433,7 @@ jobs:
       - rebase
       - format
     runs-on: ubuntu-latest
+    if: steps.check_comments_label.outputs.COMMENTER_USERNAME != 'vdaas-ci'
     steps:
       - name: check PR Comments
         id: check_comments_approve
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index fb716e763e..02b39f809e 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -16,8 +16,8 @@ on:
       - 'cmd/**'
 
 jobs:
-  coverage:
-    name: Run tests
+  test-cmd:
+    name: Run tests for cmd packages
     runs-on: ubuntu-latest
     container:
       image: vdaas/vald-ci-container:nightly
@@ -26,6 +26,32 @@ jobs:
         uses: actions/checkout@v1
         with:
           fetch-depth: 1
-      - name: Run tests
+      - name: Run tests for cmd packages
         run: |
-          make test
+          make test/cmd
+  test-internal:
+    name: Run tests for internal packages
+    runs-on: ubuntu-latest
+    container:
+      image: vdaas/vald-ci-container:nightly
+    steps:
+      - name: Check out code.
+        uses: actions/checkout@v1
+        with:
+          fetch-depth: 1
+      - name: Run tests for internal packages
+        run: |
+          make test/internal
+  test-pkg:
+    name: Run tests for pkg packages
+    runs-on: ubuntu-latest
+    container:
+      image: vdaas/vald-ci-container:nightly
+    steps:
+      - name: Check out code.
+        uses: actions/checkout@v1
+        with:
+          fetch-depth: 1
+      - name: Run tests for pkg packages
+        run: |
+          make test/pkg
diff --git a/Makefile.d/test.mk b/Makefile.d/test.mk
index 0719b0ea4b..f20d01753d 100644
--- a/Makefile.d/test.mk
+++ b/Makefile.d/test.mk
@@ -15,9 +15,34 @@
 #
 
 .PHONY: test
-## run tests
+## run tests for cmd, internal, pkg
 test:
-	go test -json -cover ./... | tparse -top
+	go test -json -cover ./cmd/... ./internal/... ./pkg/... | tparse -notests
+
+.PHONY: test/cmd
+## run tests for cmd
+test/cmd:
+	go test -json -cover ./cmd/... | tparse -pass -notests
+
+.PHONY: test/internal
+## run tests for internal
+test/internal:
+	go test -json -cover ./internal/... | tparse -pass -notests
+
+.PHONY: test/pkg
+## run tests for pkg
+test/pkg:
+	go test -json -cover ./pkg/... | tparse -pass -notests
+
+.PHONY: test/hack
+## run tests for hack
+test/hack:
+	go test -json -cover ./hack/... | tparse -pass -notests
+
+.PHONY: test/all
+## run tests for all Go codes
+test/all:
+	go test -json -cover ./... | tparse -notests
 
 .PHONY: coverage
 ## calculate coverages