diff --git a/llvm/test/MC/COFF/bad-expr.s b/llvm/test/MC/COFF/bad-expr.s
new file mode 100644
index 000000000000..ecbdd415c3a6
--- /dev/null
+++ b/llvm/test/MC/COFF/bad-expr.s
@@ -0,0 +1,7 @@
+// RUN: not llvm-mc -filetype=obj -triple i386-pc-win32 %s 2>&1 | FileCheck %s
+
+// CHECK: symbol '__ImageBase' can not be undefined in a subtraction expression
+
+        .data
+_x:
+        .long   _x-__ImageBase
diff --git a/llvm/test/MC/ELF/bad-expr.s b/llvm/test/MC/ELF/bad-expr.s
new file mode 100644
index 000000000000..1cad919fee3c
--- /dev/null
+++ b/llvm/test/MC/ELF/bad-expr.s
@@ -0,0 +1,8 @@
+// RUN: not llvm-mc -filetype=obj -triple x86_64-pc-linux-gnu %s -o /dev/null 2>%t
+// RUN: FileCheck --input-file=%t %s
+
+// CHECK: symbol '__executable_start' can not be undefined in a subtraction expression
+
+        .data
+x:
+        .quad   x-__executable_start