diff --git a/test/Analysis/dead-stores.c b/test/Analysis/dead-stores.c
index 7d7b369..2d07a80 100644
--- a/test/Analysis/dead-stores.c
+++ b/test/Analysis/dead-stores.c
@@ -12,7 +12,8 @@
 void f2(void *b) {
  char *c = (char*)b; // no-warning
  char *d = b+1; // expected-warning {{never read}}
- printf("%s", c);
+ printf("%s", c); // expected-warning{{implicitly declaring C library function 'printf' with type 'int (char const *, ...)'}} \
+ // expected-note{{please include the header <stdio.h> or explicitly provide a declaration for 'printf'}}
 }
 
 void f3() {
diff --git a/test/Analysis/uninit-vals.c b/test/Analysis/uninit-vals.c
index a7f5733..2f2c33d 100644
--- a/test/Analysis/uninit-vals.c
+++ b/test/Analysis/uninit-vals.c
@@ -31,7 +31,9 @@
 void f6(int i) {
   int x;
   for (i = 0 ; i < 10; i++)
-    printf("%d",x++); // expected-warning {{use of uninitialized variable}}
+    printf("%d",x++); // expected-warning {{use of uninitialized variable}} \
+  // expected-warning{{implicitly declaring C library function 'printf' with type 'int (char const *, ...)'}} \
+  // expected-note{{please include the header <stdio.h> or explicitly provide a declaration for 'printf'}}
 }
 
 void f7(int i) {
diff --git a/test/Rewriter/finally.m b/test/Rewriter/finally.m
index 903cdec..0d623dc 100644
--- a/test/Rewriter/finally.m
+++ b/test/Rewriter/finally.m
@@ -2,7 +2,8 @@
 
 int main() {
   @try {
-    printf("executing try");
+    printf("executing try"); // expected-warning{{implicitly declaring C library function 'printf' with type 'int (char const *, ...)'}} \
+        // expected-note{{please include the header <stdio.h> or explicitly provide a declaration for 'printf'}}
     return(0); // expected-warning{{rewriter doesn't support user-specified control flow semantics for @try/@finally (code may not execute properly)}}
   } @finally {
     printf("executing finally");
diff --git a/test/Sema/block-return.c b/test/Sema/block-return.c
index 64c2993..a370534 100644
--- a/test/Sema/block-return.c
+++ b/test/Sema/block-return.c
@@ -80,5 +80,6 @@
   int (^xx)(const char *s) = ^(char *s) { return 1; }; // expected-warning {{incompatible block pointer types initializing 'int (^)(char *)', expected 'int (^)(char const *)'}}
   int (*yy)(const char *s) = funk; // expected-warning {{incompatible pointer types initializing 'int (char *)', expected 'int (*)(char const *)'}}
   
-  int (^nested)(char *s) = ^(char *str) { void (^nest)(void) = ^(void) { printf("%s\n", str); }; next(); return 1; };
+  int (^nested)(char *s) = ^(char *str) { void (^nest)(void) = ^(void) { printf("%s\n", str); }; next(); return 1; }; // expected-warning{{implicitly declaring C library function 'printf' with type 'int (char const *, ...)'}} \
+  // expected-note{{please include the header <stdio.h> or explicitly provide a declaration for 'printf'}}
 }