diff --git a/ets2panda/parser/ETSparserExpressions.cpp b/ets2panda/parser/ETSparserExpressions.cpp
index bff2cbec61e8ca9a642255a35da2c38a699fa4e7..8337da604aa399b0bd528a98bfd08651903f5ac8 100644
--- a/ets2panda/parser/ETSparserExpressions.cpp
+++ b/ets2panda/parser/ETSparserExpressions.cpp
@@ -688,6 +688,11 @@ ir::Expression *ETSParser::ParseNewExpression()
 ir::Expression *ETSParser::ParseAsyncExpression()
 {
     Lexer()->NextToken();  // eat 'async'
+    if (Lexer()->GetToken().Type() == lexer::TokenType::KEYW_FUNCTION) {
+        LogError(diagnostic::FUNC_EXPR);
+        ParseFunctionDeclaration(true, ir::ModifierFlags::NONE);
+        return AllocBrokenExpression(Lexer()->GetToken().Loc());
+    }
     if (Lexer()->GetToken().Type() != lexer::TokenType::PUNCTUATOR_LEFT_PARENTHESIS ||
         !IsArrowFunctionExpressionStart()) {
         LogExpectedToken(lexer::TokenType::PUNCTUATOR_LEFT_PARENTHESIS);
diff --git a/ets2panda/test/ast/compiler/ets/async-function-expression1.ets b/ets2panda/test/ast/compiler/ets/async-function-expression1.ets
new file mode 100644
index 0000000000000000000000000000000000000000..de02a742451ceee41853731115e253ec22a218be
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/async-function-expression1.ets
@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+function relationalStoreCustomDirTest() {
+    it(async function () {})
+
+    it(async function () {
+        let storestore = null;
+        let u8 = new Uint8Array([1, 2, 3]);
+        const valueBucket = {
+            "name": "",
+            "age": 18,
+            "salary": 100.5,
+            "blobType": u8,
+        }
+        let ret = await storestore.insert("test", valueBucket);
+    })
+
+    it(async function () {
+        const STORE_CONFIG = {
+            name: "",
+            securityLevel: data_Rdb.SecurityLevel.S1,
+            customDir: ""
+        }
+        let storestore = await data_Rdb.getRdbStore(context, STORE_CONFIG);
+        await storestore.executeSql(CREATE_TABLE_TEST, null);
+        let u8 = new Uint8Array([1, 2, 3]);
+        const valueBucket = {
+            "name": "",
+            "age": 18,
+            "salary": 100.5,
+            "blobType": u8,
+        }
+        let ret = await storestore.insert("test", valueBucket);
+    })
+}
+/* @@? 17:5 Error TypeError: Unresolved reference it */
+/* @@? 17:14 Error SyntaxError: Function expressions are not supported, use arrow functions instead */
+/* @@? 19:5 Error TypeError: This expression is not callable. */
+/* @@? 19:14 Error SyntaxError: Function expressions are not supported, use arrow functions instead */
+/* @@? 31:5 Error TypeError: This expression is not callable. */
+/* @@? 31:14 Error SyntaxError: Function expressions are not supported, use arrow functions instead */
diff --git a/ets2panda/test/ast/compiler/ets/async-function-expression2.ets b/ets2panda/test/ast/compiler/ets/async-function-expression2.ets
new file mode 100644
index 0000000000000000000000000000000000000000..c4fef79dcf25a122cf68f790e788854816ff7fc9
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/async-function-expression2.ets
@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+function relationalStoreCustomDirTest() {
+    it(async function function() {})
+
+    it(async function function() {
+        let storestore = null;
+        let u8 = new Uint8Array([1, 2, 3]);
+        const valueBucket = {
+            "name": "",
+            "age": 18,
+            "salary": 100.5,
+            "blobType": u8,
+        }
+        let ret = await storestore.insert("test", valueBucket);
+    })
+
+    it(async function function() {
+        const STORE_CONFIG = {
+            name: "",
+            securityLevel: data_Rdb.SecurityLevel.S1,
+            customDir: ""
+        }
+        let storestore = await data_Rdb.getRdbStore(context, STORE_CONFIG);
+        await storestore.executeSql(CREATE_TABLE_TEST, null);
+        let u8 = new Uint8Array([1, 2, 3]);
+        const valueBucket = {
+            "name": "",
+            "age": 18,
+            "salary": 100.5,
+            "blobType": u8,
+        }
+        let ret = await storestore.insert("test", valueBucket);
+    })
+}
+/* @@? 17:5 Error TypeError: Unresolved reference it */
+/* @@? 17:14 Error SyntaxError: Function expressions are not supported, use arrow functions instead */
+/* @@? 17:23 Error SyntaxError: Unexpected token, expected '('. */
+/* @@? 17:31 Error SyntaxError: Unexpected token, expected an identifier. */
+/* @@? 17:31 Error SyntaxError: Parameter declaration should have an explicit type annotation. */
+/* @@? 17:31 Error SyntaxError: Unexpected token, expected ',' or ')'. */
+/* @@? 19:5 Error TypeError: This expression is not callable. */
+/* @@? 19:14 Error SyntaxError: Function expressions are not supported, use arrow functions instead */
+/* @@? 19:23 Error SyntaxError: Unexpected token, expected '('. */
+/* @@? 19:31 Error SyntaxError: Unexpected token, expected ',' or ')'. */
+/* @@? 19:31 Error SyntaxError: Parameter declaration should have an explicit type annotation. */
+/* @@? 19:31 Error SyntaxError: Unexpected token, expected an identifier. */
+/* @@? 31:5 Error TypeError: This expression is not callable. */
+/* @@? 31:14 Error SyntaxError: Function expressions are not supported, use arrow functions instead */
+/* @@? 31:23 Error SyntaxError: Unexpected token, expected '('. */
+/* @@? 31:31 Error SyntaxError: Unexpected token, expected an identifier. */
+/* @@? 31:31 Error SyntaxError: Parameter declaration should have an explicit type annotation. */
+/* @@? 31:31 Error SyntaxError: Unexpected token, expected ',' or ')'. */