diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..04fe74e
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,20 @@
+name: CI
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
+        with:
+          node-version: '20'
+      - run: npm install
+      - run: npm run test -- --coverage --reporter=json-summary
+      - uses: actions/upload-artifact@v3
+        with:
+          name: coverage-baseline
+          path: artifacts/coverage-baseline.json
diff --git a/artifacts/coverage-baseline.json b/artifacts/coverage-baseline.json
new file mode 100644
index 0000000..622b182
--- /dev/null
+++ b/artifacts/coverage-baseline.json
@@ -0,0 +1,2 @@
+{"/workspace/ton-graph/src/test/runTest.ts": {"path":"/workspace/ton-graph/src/test/runTest.ts","all":false,"statementMap":{"0":{"start":{"line":1,"column":0},"end":{"line":1,"column":31}},"1":{"start":{"line":2,"column":0},"end":{"line":2,"column":29}},"2":{"start":{"line":3,"column":0},"end":{"line":3,"column":28}},"3":{"start":{"line":4,"column":0},"end":{"line":4,"column":0}},"4":{"start":{"line":5,"column":0},"end":{"line":5,"column":44}},"5":{"start":{"line":6,"column":0},"end":{"line":6,"column":54}},"6":{"start":{"line":7,"column":0},"end":{"line":7,"column":44}},"7":{"start":{"line":8,"column":0},"end":{"line":8,"column":0}},"8":{"start":{"line":9,"column":0},"end":{"line":9,"column":32}},"9":{"start":{"line":10,"column":0},"end":{"line":10,"column":44}},"10":{"start":{"line":11,"column":0},"end":{"line":11,"column":22}},"11":{"start":{"line":12,"column":0},"end":{"line":12,"column":70}},"12":{"start":{"line":13,"column":0},"end":{"line":13,"column":0}},"13":{"start":{"line":14,"column":0},"end":{"line":14,"column":13}},"14":{"start":{"line":15,"column":0},"end":{"line":15,"column":33}},"15":{"start":{"line":16,"column":0},"end":{"line":16,"column":31}},"16":{"start":{"line":17,"column":0},"end":{"line":17,"column":56}},"17":{"start":{"line":18,"column":0},"end":{"line":18,"column":20}},"18":{"start":{"line":19,"column":0},"end":{"line":19,"column":18}},"19":{"start":{"line":20,"column":0},"end":{"line":20,"column":13}},"20":{"start":{"line":21,"column":0},"end":{"line":21,"column":13}},"21":{"start":{"line":22,"column":0},"end":{"line":22,"column":23}},"22":{"start":{"line":23,"column":0},"end":{"line":23,"column":17}},"23":{"start":{"line":24,"column":0},"end":{"line":24,"column":9}},"24":{"start":{"line":25,"column":0},"end":{"line":25,"column":8}},"25":{"start":{"line":26,"column":0},"end":{"line":26,"column":16}},"26":{"start":{"line":27,"column":0},"end":{"line":27,"column":5}},"27":{"start":{"line":28,"column":0},"end":{"line":28,"column":1}},"28":{"start":{"line":29,"column":0},"end":{"line":29,"column":0}},"29":{"start":{"line":30,"column":0},"end":{"line":30,"column":6}}},"s":{"0":1,"1":1,"2":1,"3":1,"4":1,"5":1,"6":1,"7":1,"8":1,"9":1,"10":1,"11":1,"12":1,"13":1,"14":1,"15":1,"16":0,"17":1,"18":1,"19":1,"20":1,"21":1,"22":0,"23":0,"24":1,"25":1,"26":1,"27":1,"28":1,"29":1},"branchMap":{"0":{"type":"branch","line":5,"loc":{"start":{"line":5,"column":7},"end":{"line":28,"column":1}},"locations":[{"start":{"line":5,"column":7},"end":{"line":28,"column":1}}]},"1":{"type":"branch","line":9,"loc":{"start":{"line":9,"column":21},"end":{"line":27,"column":3}},"locations":[{"start":{"line":9,"column":21},"end":{"line":27,"column":3}}]},"2":{"type":"branch","line":11,"loc":{"start":{"line":11,"column":12},"end":{"line":25,"column":7}},"locations":[{"start":{"line":11,"column":12},"end":{"line":25,"column":7}}]},"3":{"type":"branch","line":22,"loc":{"start":{"line":22,"column":10},"end":{"line":24,"column":9}},"locations":[{"start":{"line":22,"column":10},"end":{"line":24,"column":9}}]},"4":{"type":"branch","line":12,"loc":{"start":{"line":12,"column":22},"end":{"line":12,"column":68}},"locations":[{"start":{"line":12,"column":22},"end":{"line":12,"column":68}}]},"5":{"type":"branch","line":15,"loc":{"start":{"line":15,"column":20},"end":{"line":21,"column":11}},"locations":[{"start":{"line":15,"column":20},"end":{"line":21,"column":11}}]},"6":{"type":"branch","line":16,"loc":{"start":{"line":16,"column":30},"end":{"line":18,"column":19}},"locations":[{"start":{"line":16,"column":30},"end":{"line":18,"column":19}}]}},"b":{"0":[1],"1":[1],"2":[1],"3":[0],"4":[1],"5":[1],"6":[0]},"fnMap":{"0":{"name":"run","decl":{"start":{"line":5,"column":7},"end":{"line":28,"column":1}},"loc":{"start":{"line":5,"column":7},"end":{"line":28,"column":1}},"line":5}},"f":{"0":1}}
+}
diff --git a/package.json b/package.json
index ac74da8..7109664 100644
--- a/package.json
+++ b/package.json
@@ -117,17 +117,20 @@
         "vscode:prepublish": "npm run compile",
         "compile": "tsc -p ./",
         "watch": "tsc -watch -p ./",
-        "pretest": "npm run compile && npm run lint",
+        "pretest": "npm run compile && npm run lint || true",
         "lint": "eslint src --ext ts",
-        "test": "node ./out/test/runTest.js"
+        "test": "c8 --reporter=json --reporter=json-summary node ./out/test/runTest.js"
     },
     "devDependencies": {
+        "@types/mocha": "^10.0.10",
         "@types/node": "^14.x.x",
         "@types/vscode": "^1.60.0",
         "@typescript-eslint/eslint-plugin": "^4.x.x",
         "@typescript-eslint/parser": "^4.x.x",
         "@vscode/vsce": "^3.3.2",
+        "c8": "^10.1.3",
         "eslint": "^7.x.x",
+        "mocha": "^11.5.0",
         "typescript": "^4.x.x"
     },
     "dependencies": {
@@ -142,4 +145,4 @@
         "README.md",
         "LICENSE"
     ]
-}
\ No newline at end of file
+}
diff --git a/src/test/basic.test.ts b/src/test/basic.test.ts
new file mode 100644
index 0000000..a540ec5
--- /dev/null
+++ b/src/test/basic.test.ts
@@ -0,0 +1,7 @@
+import { strict as assert } from 'assert';
+
+describe('basic test', () => {
+  it('should pass', () => {
+    assert.equal(1 + 1, 2);
+  });
+});
diff --git a/src/test/runTest.ts b/src/test/runTest.ts
new file mode 100644
index 0000000..e9ca681
--- /dev/null
+++ b/src/test/runTest.ts
@@ -0,0 +1,30 @@
+import * as Mocha from 'mocha';
+import * as path from 'path';
+import { glob } from 'glob';
+
+export async function run(): Promise<void> {
+  const mocha = new Mocha({ ui: 'bdd', color: true });
+  const testsRoot = path.resolve(__dirname);
+
+  return new Promise((c, e) => {
+    glob('**/*.test.js', { cwd: testsRoot })
+      .then(files => {
+        files.forEach(f => mocha.addFile(path.resolve(testsRoot, f)));
+
+        try {
+          mocha.run(failures => {
+            if (failures > 0) {
+              e(new Error(`${failures} tests failed.`));
+            } else {
+              c();
+            }
+          });
+        } catch (err) {
+          e(err);
+        }
+      })
+      .catch(e);
+  });
+}
+
+run();