diff --git a/crates/swc_ecma_transforms_typescript/tests/fixture/issue-2670/input.ts b/crates/swc_ecma_transforms_typescript/tests/fixture/issue-2670/input.ts
new file mode 100644
index 00000000000..e89a781f84d
--- /dev/null
+++ b/crates/swc_ecma_transforms_typescript/tests/fixture/issue-2670/input.ts
@@ -0,0 +1,4 @@
+export namespace TEST {
+    export const VAL1 = 'value1';
+    export const VAL2 = `${VAL1}_value2`;
+}
\ No newline at end of file
diff --git a/crates/swc_ecma_transforms_typescript/tests/fixture/issue-2670/output.js b/crates/swc_ecma_transforms_typescript/tests/fixture/issue-2670/output.js
new file mode 100644
index 00000000000..822246674a8
--- /dev/null
+++ b/crates/swc_ecma_transforms_typescript/tests/fixture/issue-2670/output.js
@@ -0,0 +1,5 @@
+export var TEST;
+(function(TEST1) {
+    var VAL1 = TEST1.VAL1 = "value1";
+    var VAL2 = TEST1.VAL2 = `${VAL1}_value2`;
+})(TEST || (TEST = {}));