diff --git a/__tests__/script.test.js b/__tests__/script.test.js
new file mode 100644
index 0000000000..0fdb66d461
--- /dev/null
+++ b/__tests__/script.test.js
@@ -0,0 +1,31 @@
+test('Check SDK is loaded as object and api calls reaching to hit network', () => {
+    let xhrMock = {
+        open: jest.fn(),
+        setRequestHeader: jest.fn(),
+        onreadystatechange: jest.fn(),
+        send: jest.fn(),
+        readyState: 4,
+        responseText: JSON.stringify({}),
+        status: 200
+    }
+  
+    window.XMLHttpRequest = jest.fn(() => xhrMock)
+
+    document.head.innerHTML = `
+    `;
+    rudderanalytics = window.rudderanalytics = [];
+    for(var methods=["load","page","track","alias","group","identify","ready","reset"],i=0;i<methods.length;i++){var method=methods[i];rudderanalytics[method]=function(d){return function(){rudderanalytics.push([d,...arguments])}}(method)}rudderanalytics.load("1d4Qof5j9WqTuFhvUkmLaHe4EV3","https://hosted.rudderlabs.com", {logLevel:"DEBUG"}),rudderanalytics.page();
+    
+    require("./prod_test.js")
+
+    console.log(rudderanalytics)
+    
+    rudderanalytics.page()
+    rudderanalytics.track("test-event")
+    rudderanalytics.identify("jest-user")
+
+    // check the sdk loaded successfully
+    expect(global.rudderanalytics.push).not.toBe(Array.prototype.push);
+    // one source config endpoint call, one implicit page call, three explicit calls
+    expect(xhrMock.send).toHaveBeenCalledTimes(5)
+  });
\ No newline at end of file
diff --git a/buildspec.yml b/buildspec.yml
new file mode 100644
index 0000000000..320bf5387e
--- /dev/null
+++ b/buildspec.yml
@@ -0,0 +1,20 @@
+version: 0.2
+
+phases:
+  install:
+    runtime-versions:
+      nodejs: 10
+  build:
+    commands:
+      - ls
+      - npm install --unsafe-perm
+      - npm run prodTest
+      - npm run buildProdBrowser
+      - sed 's|rudder-analytics.min.js.map|https://cdn.rudderlabs.com/rudder-analytics.min.js.map|' dist/rudder-analytics.min.js  > dist/prod.js
+      - mv dist/prod.js dist/rudder-analytics.min.js
+  post_build:
+    commands:
+      - aws s3 cp dist/rudder-analytics.min.js s3://test-JS/rudder-analytics.min.js --metadata '{"max-age":"3600"}'
+artifacts:
+  files:
+    - "**/*"
\ No newline at end of file
diff --git a/package.json b/package.json
index 804e03974c..c150403b99 100644
--- a/package.json
+++ b/package.json
@@ -12,6 +12,7 @@
   ],
   "scripts": {
     "test": "./scripts/run_tests.sh",
+    "prodTest": "npm run buildProdBrowser && sed 's/var rudderanalytics/rudderanalytics/g' dist/rudder-analytics.min.js > __tests__/prod_test.js && jest script.test.js",
     "buildDevBrowser": "NODE_ENV=false uglify=false rollup -c",
     "buildProdBrowser": "NODE_ENV=false PROD_DEBUG=true ENV=prod uglify=true rollup -c",
     "buildProdBrowserDebug": "NODE_ENV=false ENV=prod PROD_DEBUG_INLINE=true uglify=true rollup -c",
@@ -59,6 +60,7 @@
   "devDependencies": {
     "@babel/core": "^7.6.2",
     "@babel/preset-env": "^7.6.2",
+    "@mediaeventservices/jest-environment-jsdom-external-scripts": "^21.2.2",
     "@size-limit/preset-big-lib": "^4.4.1",
     "eslint": "^6.1.0",
     "eslint-config-airbnb": "^18.0.1",
@@ -68,6 +70,7 @@
     "eslint-plugin-prettier": "^3.1.0",
     "eslint-plugin-react": "^7.14.3",
     "eslint-plugin-react-hooks": "^1.7.0",
+    "jest": "^26.0.1",
     "rollup": "^1.22.0",
     "rollup-plugin-babel": "^4.3.3",
     "rollup-plugin-brotli": "^2.0.2",