diff --git a/crates/swc_ecma_minifier/tests/fixture/issues/6146/output.js b/crates/swc_ecma_minifier/tests/fixture/issues/6146/output.js
new file mode 100644
index 0000000000000..3db1306554ed9
--- /dev/null
+++ b/crates/swc_ecma_minifier/tests/fixture/issues/6146/output.js
@@ -0,0 +1,6 @@
+let o = {
+    f () {
+        assert.ok(this !== o);
+    }
+};
+(o.f)``;