diff --git a/llvm/test/tools/llvm-mc/line_end_with_space.test b/llvm/test/tools/llvm-mc/line_end_with_space.test
--- a/llvm/test/tools/llvm-mc/line_end_with_space.test
+++ b/llvm/test/tools/llvm-mc/line_end_with_space.test
@@ -1 +1,4 @@
+# Test that llvm-mc doesn't crash when disassembling a line that ends with a
+# space.
 RUN: llvm-mc -disassemble %s
+