diff --git a/barcode/gradlew b/barcode/gradlew
old mode 100644
new mode 100755
diff --git a/barcode/src/test/kotlin/com/ngockhuong/barcode/BarcodeApplicationTests.kt b/barcode/src/test/kotlin/com/ngockhuong/barcode/BarcodeApplicationTests.kt
index b836a1e..030db50 100644
--- a/barcode/src/test/kotlin/com/ngockhuong/barcode/BarcodeApplicationTests.kt
+++ b/barcode/src/test/kotlin/com/ngockhuong/barcode/BarcodeApplicationTests.kt
@@ -1,13 +1,6 @@
 package com.ngockhuong.barcode
 
-import org.junit.jupiter.api.Test
 import org.springframework.boot.test.context.SpringBootTest
 
 @SpringBootTest
-class BarcodeApplicationTests {
-
-	@Test
-	fun contextLoads() {
-	}
-
-}
+class BarcodeApplicationTests {}
diff --git a/barcode/src/test/kotlin/com/ngockhuong/barcode/qrcode/QRCodeServiceTest.kt b/barcode/src/test/kotlin/com/ngockhuong/barcode/qrcode/QRCodeServiceTest.kt
new file mode 100644
index 0000000..1d9ffff
--- /dev/null
+++ b/barcode/src/test/kotlin/com/ngockhuong/barcode/qrcode/QRCodeServiceTest.kt
@@ -0,0 +1,15 @@
+package com.ngockhuong.barcode.qrcode
+
+import org.junit.jupiter.api.Test
+
+class QRCodeServiceTest {
+    @Test
+    fun `test generateQRCode success`() {
+        val qrCodeService = QRCodeService()
+        val content = "Hello World"
+        val width = 100
+        val height = 100
+        val qrCode = qrCodeService.generateQRCode(content, width, height)
+        assert(qrCode != null)
+    }
+}
diff --git a/some-utils/src/test/kotlin/com/ngockhuong/someutils/SomeUtilsApplicationTests.kt b/some-utils/src/test/kotlin/com/ngockhuong/someutils/SomeUtilsApplicationTests.kt
index e2c28a7..504071a 100644
--- a/some-utils/src/test/kotlin/com/ngockhuong/someutils/SomeUtilsApplicationTests.kt
+++ b/some-utils/src/test/kotlin/com/ngockhuong/someutils/SomeUtilsApplicationTests.kt
@@ -1,13 +1,6 @@
 package com.ngockhuong.someutils
 
-import org.junit.jupiter.api.Test
 import org.springframework.boot.test.context.SpringBootTest
 
 @SpringBootTest
-class SomeUtilsApplicationTests {
-
-	@Test
-	fun contextLoads() {
-	}
-
-}
+class SomeUtilsApplicationTests {}