diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 78b9420..8df1167 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -94,3 +94,45 @@ jobs:
           git diff --exit-code --no-index \
             tests/output/main.expected.js \
             tests/output/prod/js/main.min.js
+
+  js_engine_babel:
+    name: "js_engine / babel"
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout the repository
+        uses: actions/checkout@v4
+
+      - name: Test js_engine babel
+        uses: ./
+        with:
+          directory: "tests/js_engine"
+          output: "tests/js_engine/babel"
+          js_engine: "babel"
+
+      - name: Assert js_engine babel result matches expected
+        run: |
+          git diff --exit-code --no-index \
+            tests/js_engine/babel/main.expected.js \
+            tests/js_engine/babel/main.min.js
+
+  js_engine_uglify_js:
+    name: "js_engine / uglify-js"
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout the repository
+        uses: actions/checkout@v4
+
+      - name: Test js_engine uglify-js
+        uses: ./
+        with:
+          directory: "tests/js_engine"
+          output: "tests/js_engine/uglify-js"
+          js_engine: "uglify-js"
+
+      - name: Assert js_engine uglify-js result matches expected
+        run: |
+          git diff --exit-code --no-index \
+            tests/js_engine/uglify-js/main.expected.js \
+            tests/js_engine/uglify-js/main.min.js
diff --git a/tests/js_engine/babel/main.expected.js b/tests/js_engine/babel/main.expected.js
new file mode 100644
index 0000000..11d0ca3
--- /dev/null
+++ b/tests/js_engine/babel/main.expected.js
@@ -0,0 +1 @@
+function addNumbers(c,a){return c+a}function subtractNumbers(c,a){return c-a}const name="GitHub Actions";console.log(`Testing minification with ${"GitHub Actions"}!`);const numbers=[1,2,3,4,5],doubledNumbers=numbers.map(a=>2*a);console.log(doubledNumbers);const calculator={add:(a,b)=>a+b,subtract:(a,b)=>a-b,multiply:(a,b)=>a*b,divide:(a,b)=>a/b};console.log(calculator.add(5,7)),console.log(calculator.subtract(10,5));async function fetchData(a){try{const b=await fetch(a),c=await b.json();console.log(c)}catch(a){console.error("Error fetching data:",a)}}fetchData("https://api.github.com/repos/nizarmah/auto-minify");
\ No newline at end of file
diff --git a/tests/js_engine/main.js b/tests/js_engine/main.js
new file mode 100644
index 0000000..d57f091
--- /dev/null
+++ b/tests/js_engine/main.js
@@ -0,0 +1,50 @@
+// Example JavaScript file for minification testing
+
+// Function to add two numbers
+function addNumbers(a, b) {
+  return a + b;
+}
+
+// Function to subtract two numbers
+function subtractNumbers(a, b) {
+  return a - b;
+}
+
+// Using a template string and a variable
+const name = "GitHub Actions";
+console.log(`Testing minification with ${name}!`);
+
+// An array of numbers
+const numbers = [1, 2, 3, 4, 5];
+
+// Using map to create a new array
+const doubledNumbers = numbers.map((number) => number * 2);
+console.log(doubledNumbers);
+
+// Object with methods
+const calculator = {
+  add: (x, y) => x + y,
+  subtract: (x, y) => x - y,
+  multiply: (x, y) => x * y,
+  divide: (x, y) => x / y,
+};
+
+// Using the calculator object
+console.log(calculator.add(5, 7));
+console.log(calculator.subtract(10, 5));
+
+// Testing async function
+async function fetchData(url) {
+  try {
+    const response = await fetch(url);
+    const data = await response.json();
+    console.log(data);
+  } catch (error) {
+    console.error("Error fetching data:", error);
+  }
+}
+
+// Invoking async function (this will fail without a valid URL or in a non-browser environment)
+fetchData("https://api.github.com/repos/nizarmah/auto-minify");
+
+// End of file
diff --git a/tests/js_engine/uglify-js/main.expected.js b/tests/js_engine/uglify-js/main.expected.js
new file mode 100644
index 0000000..d279ced
--- /dev/null
+++ b/tests/js_engine/uglify-js/main.expected.js
@@ -0,0 +1 @@
+function addNumbers(t,o){return t+o}function subtractNumbers(t,o){return t-o}const name="GitHub Actions",numbers=(console.log(`Testing minification with ${name}!`),[1,2,3,4,5]),doubledNumbers=numbers.map(t=>2*t),calculator=(console.log(doubledNumbers),{add:(t,o)=>t+o,subtract:(t,o)=>t-o,multiply:(t,o)=>t*o,divide:(t,o)=>t/o});async function fetchData(t){try{var o=await(await fetch(t)).json();console.log(o)}catch(t){console.error("Error fetching data:",t)}}console.log(calculator.add(5,7)),console.log(calculator.subtract(10,5)),fetchData("https://api.github.com/repos/nizarmah/auto-minify");
\ No newline at end of file