diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
new file mode 100644
index 0000000..d4378d4
--- /dev/null
+++ b/.github/workflows/lint.yml
@@ -0,0 +1,17 @@
+name: Linting with luacheck
+
+on:
+  - push
+  - pull_request
+
+jobs:
+  run-luacheck-linter:
+   runs-on: ubuntu-latest
+   steps:
+    - uses: actions/checkout@v3
+    - uses: tarantool/setup-tarantool@v2
+      with:
+        tarantool-version: '2.10.4'
+
+    - name: install tarantool/luacheck and execute it
+      run: tarantoolctl rocks install luacheck && .rocks/bin/luacheck .
diff --git a/.github/workflows/push-rockspec.yml b/.github/workflows/push-rockspec.yml
new file mode 100644
index 0000000..dfa5c93
--- /dev/null
+++ b/.github/workflows/push-rockspec.yml
@@ -0,0 +1,58 @@
+name: Create and push rockspec for moonlibs/sync
+
+on:
+  workflow_dispatch:
+    workflows:
+      - "Linting with luacheck"
+      - "Testing with unit tests"
+    types:
+      - completed
+  push:
+    tags:
+      - '*'
+
+env:
+  ROCK_NAME: sync
+
+jobs:
+  pack-and-push-tagged-rockspec:
+   runs-on: ubuntu-latest
+   if: ${{ github.event.workflow_run.conclusion == 'success' }} && startsWith(github.ref, 'refs/tags/') }}
+   steps:
+    - uses: actions/checkout@v3
+    - uses: tarantool/setup-tarantool@v2
+      with:
+        tarantool-version: '2.10.4'
+
+    # https://stackoverflow.com/questions/58177786/get-the-current-pushed-tag-in-github-actions
+    - name: Set env
+      run: echo "TAG=${GITHUB_REF#refs/*/}" >> $GITHUB_ENV
+
+    - run: tarantoolctl rocks new_version --tag=${{ env.TAG }} rockspecs/sync-scm-1.rockspec ${{ env.TAG }} "git+https://github.com/${{ github.repository }}.git"
+    - run: tarantoolctl rocks install ${{ env.ROCK_NAME }}-${{ env.TAG }}-1.rockspec
+    - run: tarantoolctl rocks pack ${{ env.ROCK_NAME }}-${{ env.TAG }}-1.rockspec
+    # Install native lua with luarocks
+    - uses: leafo/gh-actions-lua@v9
+      with:
+        luaVersion: "luajit-2.1.0-beta3"
+    - uses: leafo/gh-actions-luarocks@v4
+      with:
+        luarocksVersion: "3.8.0"
+    - uses: unfor19/install-aws-cli-action@v1.0.3
+    - run: mkdir .build && cp rockspecs/${{env.ROCK_NAME}}-scm-1.rockspec ${{env.ROCK_NAME}}-${{env.TAG}}-1.rockspec .build/ && cp *.src.rock .build/
+    - name: rebuild and publish s3 luarocks server
+      env:
+        AWS_ACCESS_KEY_ID: ${{ secrets.MOONLIBS_S3_ACCESS_KEY_ID }}
+        AWS_SECRET_ACCESS_KEY: ${{ secrets.MOONLIBS_S3_SECRET_KEY}}
+        AWS_EC2_METADATA_DISABLED: true
+      run: |
+        cd .build && aws s3 sync s3://moonlibs/ ./ && luarocks-admin make_manifest . && aws s3 sync --acl public-read ./ s3://moonlibs/;
+    - uses: "marvinpinto/action-automatic-releases@latest"
+      with:
+        repo_token: "${{ secrets.GITHUB_TOKEN }}"
+        prerelease: false
+        files: |
+          README.md
+          ${{env.ROCK_NAME}}-scm-1.rockspec
+          ${{env.ROCK_NAME}}-${{env.TAG}}-1.rockspec
+          ${{env.ROCK_NAME}}-${{env.TAG}}-1.src.rock
\ No newline at end of file
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
new file mode 100644
index 0000000..3da3ddc
--- /dev/null
+++ b/.github/workflows/tests.yml
@@ -0,0 +1,28 @@
+name: Testing with unit tests
+
+on:
+  - push
+  - pull_request
+
+jobs:
+  run-unit-tests:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - uses: tarantool/setup-tarantool@v2
+      with:
+        tarantool-version: '2.10.4'
+    - name: setup perl
+      uses: shogo82148/actions-setup-perl@v1
+      with:
+        perl-version: 5.18.4
+    - name: show perl version
+      run: |
+        perl -v
+    - name: install TAP::Harness
+      run: |
+        cpanm -v
+        cpanm --notest TAP::Harness
+    - name: run tests
+      run: |
+        make test
\ No newline at end of file
diff --git a/.luacheckrc b/.luacheckrc
index da1d2e2..6d826d1 100644
--- a/.luacheckrc
+++ b/.luacheckrc
@@ -1 +1,3 @@
 std="tarantool"
+
+include_files = {"sync/", "sync.lua"}
\ No newline at end of file
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..14c545d
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,4 @@
+.PHONY: test
+
+test:
+	prove test/*.test.lua
diff --git a/sync/lock.lua b/sync/lock.lua
index 370473e..a57b57e 100644
--- a/sync/lock.lua
+++ b/sync/lock.lua
@@ -32,17 +32,6 @@ function lock:_self_check()
     end
 end
 
-local function find_lockers(lock, t)
-    t = t or {}
-    --[[
-        1. lock has only one locker fiber
-        2. fiber may have several locks it keeps
-            0. harmless, forget it.
-            1+. check every lock for lockers
-    ]]
-
-end
-
 function lock:aquire(timeout)
 	if getmetatable( self ) ~= lock then
 		error("Usage: lock:aquire() (not lock.aquire())", 2)