diff --git a/src/test/run-make/symbols-are-reasonable/Makefile b/src/test/run-make/symbols-are-reasonable/Makefile
index c668ffc5832..1c117cf0c9e 100644
--- a/src/test/run-make/symbols-are-reasonable/Makefile
+++ b/src/test/run-make/symbols-are-reasonable/Makefile
@@ -1,7 +1,7 @@
 -include ../tools.mk
 
 # check that the compile generated symbols for strings, binaries,
-# vtables, etc. have semisane names (e.g. `str1234`); it's relatively
+# vtables, etc. have semisane names (e.g. `str.1234`); it's relatively
 # easy to accidentally modify the compiler internals to make them
 # become things like `str"str"(1234)`.
 
@@ -10,6 +10,6 @@ OUT=$(TMPDIR)/lib.s
 all:
 	$(RUSTC) lib.rs --emit=asm --crate-type=staticlib
 	# just check for symbol declarations with the names we're expecting.
-	grep 'str[0-9][0-9]*:' $(OUT)
-	grep 'byte_str[0-9][0-9]*:' $(OUT)
-	grep 'vtable[0-9][0-9]*' $(OUT)
+	grep 'str.[0-9][0-9]*:' $(OUT)
+	grep 'byte_str.[0-9][0-9]*:' $(OUT)
+	grep 'vtable.[0-9][0-9]*' $(OUT)