diff --git a/crates/swc_ecma_minifier/tests/fixture/issues/6508/1/input.js b/crates/swc_ecma_minifier/tests/fixture/issues/6508/1/input.js
new file mode 100644
index 000000000000..50bca323d358
--- /dev/null
+++ b/crates/swc_ecma_minifier/tests/fixture/issues/6508/1/input.js
@@ -0,0 +1,2 @@
+'use client';
+foo(() => { })
\ No newline at end of file
diff --git a/crates/swc_ecma_minifier/tests/fixture/issues/6508/1/output.js b/crates/swc_ecma_minifier/tests/fixture/issues/6508/1/output.js
new file mode 100644
index 000000000000..3d7d71ddd2a3
--- /dev/null
+++ b/crates/swc_ecma_minifier/tests/fixture/issues/6508/1/output.js
@@ -0,0 +1,2 @@
+'use client';
+foo(()=>{});
diff --git a/crates/swc_ecma_minifier/tests/fixture/issues/6508/1/output/input.js b/crates/swc_ecma_minifier/tests/fixture/issues/6508/1/output/input.js
new file mode 100644
index 000000000000..abd1018de3c9
--- /dev/null
+++ b/crates/swc_ecma_minifier/tests/fixture/issues/6508/1/output/input.js
@@ -0,0 +1,2 @@
+"use client";
+foo(function() {});
diff --git a/crates/swc_ecma_minifier/tests/fixture/issues/6508/1/output/output.js b/crates/swc_ecma_minifier/tests/fixture/issues/6508/1/output/output.js
new file mode 100644
index 000000000000..abd1018de3c9
--- /dev/null
+++ b/crates/swc_ecma_minifier/tests/fixture/issues/6508/1/output/output.js
@@ -0,0 +1,2 @@
+"use client";
+foo(function() {});
diff --git a/crates/swc_ecma_minifier/tests/fixture/issues/6508/2/input.js b/crates/swc_ecma_minifier/tests/fixture/issues/6508/2/input.js
new file mode 100644
index 000000000000..fb1e16696ec8
--- /dev/null
+++ b/crates/swc_ecma_minifier/tests/fixture/issues/6508/2/input.js
@@ -0,0 +1,6 @@
+'use client';
+
+
+export class Foo {
+    foo() { }
+}
\ No newline at end of file
diff --git a/crates/swc_ecma_minifier/tests/fixture/issues/6508/2/output.js b/crates/swc_ecma_minifier/tests/fixture/issues/6508/2/output.js
new file mode 100644
index 000000000000..c4c54f19e4e1
--- /dev/null
+++ b/crates/swc_ecma_minifier/tests/fixture/issues/6508/2/output.js
@@ -0,0 +1,4 @@
+'use client';
+export class Foo {
+    foo() {}
+}
diff --git a/crates/swc_ecma_minifier/tests/fixture/issues/6508/2/output/output.js b/crates/swc_ecma_minifier/tests/fixture/issues/6508/2/output/output.js
new file mode 100644
index 000000000000..3df58be09e47
--- /dev/null
+++ b/crates/swc_ecma_minifier/tests/fixture/issues/6508/2/output/output.js
@@ -0,0 +1,16 @@
+"use client";
+import _class_call_check from "@swc/helpers/src/_class_call_check.mjs";
+import _create_class from "@swc/helpers/src/_create_class.mjs";
+export var Foo = /*#__PURE__*/ function() {
+    "use strict";
+    function Foo() {
+        _class_call_check(this, Foo);
+    }
+    _create_class(Foo, [
+        {
+            key: "foo",
+            value: function foo() {}
+        }
+    ]);
+    return Foo;
+}();
diff --git a/crates/swc_ecma_minifier/tests/fixture/issues/6508/3/input.js b/crates/swc_ecma_minifier/tests/fixture/issues/6508/3/input.js
new file mode 100644
index 000000000000..8f8f6847ecde
--- /dev/null
+++ b/crates/swc_ecma_minifier/tests/fixture/issues/6508/3/input.js
@@ -0,0 +1,6 @@
+'use client';
+
+
+export var Foo = {
+    foo() { }
+}
\ No newline at end of file
diff --git a/crates/swc_ecma_minifier/tests/fixture/issues/6508/3/output.js b/crates/swc_ecma_minifier/tests/fixture/issues/6508/3/output.js
new file mode 100644
index 000000000000..308a83e9e6e5
--- /dev/null
+++ b/crates/swc_ecma_minifier/tests/fixture/issues/6508/3/output.js
@@ -0,0 +1,4 @@
+'use client';
+export var Foo = {
+    foo () {}
+};
diff --git a/crates/swc_ecma_minifier/tests/fixture/issues/6508/3/output/input.js b/crates/swc_ecma_minifier/tests/fixture/issues/6508/3/output/input.js
new file mode 100644
index 000000000000..d545b3e9c19a
--- /dev/null
+++ b/crates/swc_ecma_minifier/tests/fixture/issues/6508/3/output/input.js
@@ -0,0 +1,4 @@
+"use client";
+export var Foo = {
+    foo: function foo() {}
+};
diff --git a/crates/swc_ecma_minifier/tests/fixture/issues/6508/3/output/output.js b/crates/swc_ecma_minifier/tests/fixture/issues/6508/3/output/output.js
new file mode 100644
index 000000000000..8e5cff83ee87
--- /dev/null
+++ b/crates/swc_ecma_minifier/tests/fixture/issues/6508/3/output/output.js
@@ -0,0 +1,4 @@
+"use client";
+export var Foo = {
+    foo: function() {}
+};
diff --git a/crates/swc_ecma_minifier/tests/fixture/issues/6508/config.json b/crates/swc_ecma_minifier/tests/fixture/issues/6508/config.json
new file mode 100644
index 000000000000..d778f327af74
--- /dev/null
+++ b/crates/swc_ecma_minifier/tests/fixture/issues/6508/config.json
@@ -0,0 +1,4 @@
+{
+    "defaults": true,
+    "directives": false
+}