diff --git a/crates/swc_ecma_transforms_compat/tests/optional-chaining-loose/issue-7559/input.js b/crates/swc_ecma_transforms_compat/tests/optional-chaining-loose/issue-7559/input.js
new file mode 100644
index 000000000000..1bedd2a42410
--- /dev/null
+++ b/crates/swc_ecma_transforms_compat/tests/optional-chaining-loose/issue-7559/input.js
@@ -0,0 +1,7 @@
+class Foo {
+    #x;
+
+    test() {
+        this?.y.#x;
+    }
+}
diff --git a/crates/swc_ecma_transforms_compat/tests/optional-chaining-loose/issue-7559/output.js b/crates/swc_ecma_transforms_compat/tests/optional-chaining-loose/issue-7559/output.js
new file mode 100644
index 000000000000..215a45def96c
--- /dev/null
+++ b/crates/swc_ecma_transforms_compat/tests/optional-chaining-loose/issue-7559/output.js
@@ -0,0 +1,6 @@
+class Foo {
+    #x;
+    test() {
+        this == null ? void 0 : this.y.#x;
+    }
+}