diff --git a/android/app/src/androidTest/java/com/caoccao/javet/shell/TestMainActivity.kt b/android/app/src/androidTest/java/com/caoccao/javet/shell/TestMainActivity.kt
index b5f2d3c..5ce5e8a 100644
--- a/android/app/src/androidTest/java/com/caoccao/javet/shell/TestMainActivity.kt
+++ b/android/app/src/androidTest/java/com/caoccao/javet/shell/TestMainActivity.kt
@@ -41,6 +41,13 @@ class TestMainActivity {
     @get:Rule
     val composeRule = createComposeRule()
 
+    @Test
+    fun testAppContext() {
+        // Context of the app under test.
+        val appContext = InstrumentationRegistry.getInstrumentation().targetContext
+        assertEquals("com.caoccao.javet.shell", appContext.packageName)
+    }
+
     @Test
     fun testButtonExecute() {
         V8Host.getV8Instance().createV8Runtime<V8Runtime>().use { v8Runtime ->
@@ -49,9 +56,12 @@ class TestMainActivity {
                     HomeScreen(v8Runtime = v8Runtime, stringBuilder = StringBuilder())
                 }
             }
-            composeRule.onNodeWithTag("basicTextFieldCodeString").performTextInput("1 + 1")
-            composeRule.onNodeWithTag("elevatedButtonExecute").performClick()
-            composeRule.onNodeWithTag("textResult").assertTextEquals("\n> 1 + 1\n2")
+            val nodeBasicTextField = composeRule.onNodeWithTag("basicTextFieldCodeString")
+            val nodeElevatedButtonExecute = composeRule.onNodeWithTag("elevatedButtonExecute")
+            val nodeTextResult = composeRule.onNodeWithTag("textResult")
+            nodeBasicTextField.performTextInput("1 + 1")
+            nodeElevatedButtonExecute.performClick()
+            nodeTextResult.assertTextEquals("\n> 1 + 1\n2")
         }
     }
 
@@ -64,16 +74,38 @@ class TestMainActivity {
                 }
             }
             val nodeBasicTextField = composeRule.onNodeWithTag("basicTextFieldCodeString")
+            val nodeTextResult = composeRule.onNodeWithTag("textResult")
             nodeBasicTextField.performTextInput("1 + 1\n")
             nodeBasicTextField.performTextInput("\n")
-            composeRule.onNodeWithTag("textResult").assertTextEquals("\n> 1 + 1\n2")
+            nodeTextResult.assertTextEquals("\n> 1 + 1\n2")
         }
     }
 
     @Test
-    fun testAppContext() {
-        // Context of the app under test.
-        val appContext = InstrumentationRegistry.getInstrumentation().targetContext
-        assertEquals("com.caoccao.javet.shell", appContext.packageName)
+    fun testIconButtonRefresh() {
+        V8Host.getV8Instance().createV8Runtime<V8Runtime>().use { v8Runtime ->
+            composeRule.setContent {
+                JavetShellTheme {
+                    HomeScreen(v8Runtime = v8Runtime, stringBuilder = StringBuilder())
+                }
+            }
+            val nodeIconButtonRefresh = composeRule.onNodeWithTag("iconButtonRefresh")
+            val nodeElevatedButtonExecute = composeRule.onNodeWithTag("elevatedButtonExecute")
+            val nodeBasicTextField = composeRule.onNodeWithTag("basicTextFieldCodeString")
+            val nodeTextResult = composeRule.onNodeWithTag("textResult")
+            nodeBasicTextField.performTextInput("const a = 1\n")
+            nodeElevatedButtonExecute.performClick()
+            nodeTextResult.assertTextEquals("\n> const a = 1\nundefined")
+            nodeBasicTextField.performTextInput("const a = 1\n")
+            nodeElevatedButtonExecute.performClick()
+            nodeTextResult.assertTextEquals(
+                "\n> const a = 1\nundefined" +
+                        "\n> const a = 1\nSyntaxError: Identifier 'a' has already been declared"
+            )
+            nodeIconButtonRefresh.performClick()
+            nodeBasicTextField.performTextInput("const a = 1\n")
+            nodeElevatedButtonExecute.performClick()
+            nodeTextResult.assertTextEquals("V8 context is refreshed.\n> const a = 1\nundefined")
+        }
     }
 }
\ No newline at end of file
diff --git a/android/app/src/main/java/com/caoccao/javet/shell/MainActivity.kt b/android/app/src/main/java/com/caoccao/javet/shell/MainActivity.kt
index 5caedef..253a7c5 100644
--- a/android/app/src/main/java/com/caoccao/javet/shell/MainActivity.kt
+++ b/android/app/src/main/java/com/caoccao/javet/shell/MainActivity.kt
@@ -31,8 +31,12 @@ import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.foundation.text.BasicTextField
 import androidx.compose.foundation.text.selection.SelectionContainer
 import androidx.compose.foundation.verticalScroll
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Refresh
 import androidx.compose.material3.ElevatedButton
 import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Scaffold
 import androidx.compose.material3.Surface
@@ -103,6 +107,8 @@ fun HomeScreen(
     v8Runtime: V8Runtime? = null,
     stringBuilder: StringBuilder = StringBuilder()
 ) {
+    var resultString by remember { mutableStateOf(stringBuilder.toString()) }
+    var codeString by remember { mutableStateOf("") }
     Scaffold(
         topBar = {
             TopAppBar(
@@ -112,14 +118,28 @@ fun HomeScreen(
                 ),
                 title = {
                     Text(text = stringResource(id = R.string.app_name))
+                },
+                actions = {
+                    IconButton(
+                        onClick = {
+                            v8Runtime?.resetContext()
+                            stringBuilder.clear().append("V8 context is refreshed.")
+                            codeString = ""
+                            resultString = ""
+                        },
+                        modifier = modifier.testTag("iconButtonRefresh")
+                    ) {
+                        Icon(
+                            Icons.Default.Refresh,
+                            contentDescription = stringResource(id = R.string.icon_refresh)
+                        )
+                    }
                 }
             )
         },
     ) { paddingValues ->
         val padding = 5.dp
         val scrollState = rememberScrollState(0)
-        var resultString by remember { mutableStateOf(stringBuilder.toString()) }
-        var codeString by remember { mutableStateOf("") }
         val executeCode = {
             val trimmedCodeString = codeString.trim()
             if (trimmedCodeString.isNotBlank()) {
diff --git a/android/app/src/main/res/values/strings.xml b/android/app/src/main/res/values/strings.xml
index 56d2b4f..cf49fdd 100644
--- a/android/app/src/main/res/values/strings.xml
+++ b/android/app/src/main/res/values/strings.xml
@@ -18,4 +18,5 @@
 <resources>
     <string name="app_name">Javet Shell</string>
     <string name="button_execute">Execute</string>
+    <string name="icon_refresh">Refresh</string>
 </resources>
\ No newline at end of file