diff --git a/test/built-ins/decodeURI/throws-URIError.js b/test/built-ins/decodeURI/throws-URIError.js
deleted file mode 100644
index 54d3288dc8..0000000000
--- a/test/built-ins/decodeURI/throws-URIError.js
+++ /dev/null
@@ -1,87 +0,0 @@
-// Copyright (C) 2025 ayuan.  All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-info: |
-    Verify decodeURIComponent throws URIError for various invalid UTF-8 sequences
-    Reference: https://stackoverflow.com/a/1319229/172999
-esid: sec-decodeuricomponent-encodeduricomponent
-description: |
-    Invalid sequences include:
-    - Surrogate pair encoding
-    - Overlong encoding
-    - Invalid continuation bytes
-    - Incomplete sequences
-    - Out-of-range code points
-features: [uricode]
----*/
-
-// CHECK#1: Reserved surrogate pair (U+D800-DFFF)
-(function CHECK1() {
-    var result = true;
-    try {
-        decodeURIComponent('%ED%BF%BF');
-        result = false;
-    } catch (e) {
-        if (!(e instanceof URIError)) result = false;
-    }
-    if (!result) {
-        throw new Test262Error('#1: %ED%BF%BF (surrogate pair) should throw URIError');
-    }
-})();
-
-// CHECK#2: Overlong encoding for ASCII character
-(function CHECK2() {
-    var result = true;
-    try {
-        decodeURIComponent('%C0%AF');
-        result = false;
-    } catch (e) {
-        if (!(e instanceof URIError)) result = false;
-    }
-    if (!result) {
-        throw new Test262Error('#2: %C0%AF (overlong encoding) should throw URIError');
-    }
-})();
-
-// CHECK#3: Invalid continuation byte pattern
-(function CHECK3() {
-    var result = true;
-    try {
-        decodeURIComponent('%ED%7F%BF');
-        result = false;
-    } catch (e) {
-        if (!(e instanceof URIError)) result = false;
-    }
-    if (!result) {
-        throw new Test262Error('#3: %ED%7F%BF (invalid continuation) should throw URIError');
-    }
-})();
-
-// CHECK#4: Incomplete 3-byte sequence
-(function CHECK4() {
-    var result = true;
-    try {
-        decodeURIComponent('%ED%BF');
-        result = false;
-    } catch (e) {
-        if (!(e instanceof URIError)) result = false;
-    }
-    if (!result) {
-        throw new Test262Error('#4: %ED%BF (incomplete sequence) should throw URIError');
-    }
-})();
-
-// CHECK#5: Code point beyond U+10FFFF
-(function CHECK5() {
-    var result = true;
-    try {
-        decodeURIComponent('%F4%90%80%80');
-        result = false;
-    } catch (e) {
-        if (!(e instanceof URIError)) result = false;
-    }
-    if (!result) {
-        throw new Test262Error('#5: %F4%90%80%80 (out-of-range) should throw URIError');
-    }
-})();
\ No newline at end of file
diff --git a/test/built-ins/decodeURIComponent/throw-URIError.js b/test/built-ins/decodeURIComponent/throw-URIError.js
new file mode 100644
index 0000000000..d977be28b7
--- /dev/null
+++ b/test/built-ins/decodeURIComponent/throw-URIError.js
@@ -0,0 +1,40 @@
+// Copyright (C) 2025 ayuan.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Verify decodeURIComponent throws URIError for various invalid UTF-8 sequences
+esid: sec-decodeuricomponent-encodeduricomponent
+info: |
+    Invalid sequences include:
+    - Surrogate pair encoding
+    - Overlong encoding
+    - Invalid continuation bytes
+    - Incomplete sequences
+    - Out-of-range code points
+    Reference: https://stackoverflow.com/a/1319229/172999
+---*/
+
+// CHECK#1: Reserved surrogate pair (U+D800-DFFF)
+assert.throws(URIError, function CHECK1() {
+    decodeURIComponent('%ED%BF%BF');
+}, '#1: %ED%BF%BF (surrogate pair) should throw URIError');
+  
+// CHECK#2: Overlong encoding for ASCII character
+assert.throws(URIError, function CHECK2() {
+    decodeURIComponent('%C0%AF');
+}, '#2: %C0%AF (overlong encoding) should throw URIError');
+  
+// CHECK#3: Invalid continuation byte pattern
+assert.throws(URIError, function CHECK3() {
+    decodeURIComponent('%ED%7F%BF');
+}, '#3: %ED%7F%BF (invalid continuation) should throw URIError');
+  
+// CHECK#4: Incomplete 3-byte sequence
+assert.throws(URIError, function CHECK4() {
+    decodeURIComponent('%ED%BF');
+}, '#4: %ED%BF (incomplete sequence) should throw URIError');
+  
+// CHECK#5: Code point beyond U+10FFFF
+assert.throws(URIError, function CHECK5() {
+    decodeURIComponent('%F4%90%80%80');
+},'#5: %F4%90%80%80 (out-of-range) should throw URIError');
\ No newline at end of file