diff --git a/llvm/test/MC/AsmParser/secure_log_unique.s b/llvm/test/MC/AsmParser/secure_log_unique.s
new file mode 100644
index 000000000000..c41d7a8f67ae
--- /dev/null
+++ b/llvm/test/MC/AsmParser/secure_log_unique.s
@@ -0,0 +1,9 @@
+// RUN: rm -f %t
+// RUN: AS_SECURE_LOG_FILE=%t llvm-mc -triple x86_64-apple-darwin %s
+// RUN: AS_SECURE_LOG_FILE=%t llvm-mc -triple x86_64-apple-darwin %s
+// RUN: FileCheck --input-file=%t %s
+.secure_log_unique "foobar"
+
+// CHECK: "foobar"
+// CHECK-NEXT: "foobar"
+