Index: test/asan/TestCases/debug_mapping.cc
===================================================================
--- test/asan/TestCases/debug_mapping.cc
+++ test/asan/TestCases/debug_mapping.cc
@@ -6,6 +6,12 @@
 #include <stdio.h>
 #include <stdlib.h>
 
+#if _WIN64
+#define PTR "%llx"
+#else
+#define PTR "%lx"
+#endif
+
 // printed because of verbosity=1
 // CHECK: SHADOW_SCALE: [[SCALE:[0-9]+]]
 // CHECK: SHADOW_OFFSET: [[OFFSET:0x[0-9a-f]+]]
@@ -15,7 +21,7 @@
   __asan_get_shadow_mapping(&scale, &offset);
 
   fprintf(stderr, "scale: %d\n", (int)scale);
-  fprintf(stderr, "offset: 0x%lx\n", offset);
+  fprintf(stderr, "offset: 0x" PTR "\n", (void*)offset);
 
   // CHECK: scale: [[SCALE]]
   // CHECK: offset: [[OFFSET]]
Index: test/asan/TestCases/debug_stacks.cc
===================================================================
--- test/asan/TestCases/debug_stacks.cc
+++ test/asan/TestCases/debug_stacks.cc
@@ -5,6 +5,12 @@
 // FIXME: Figure out why allocation/free stack traces may be too short on ARM.
 // REQUIRES: stable-runtime
 
+#if _WIN64
+#define PTR "%llx"
+#else
+#define PTR "%lx"
+#endif
+
 #include <sanitizer/asan_interface.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -35,9 +41,9 @@
   // CHECK: alloc stack retval ok
   fprintf(stderr, "thread id = %d\n", thread_id);
   // CHECK: thread id = 0
-  fprintf(stderr, "0x%lx\n", trace[0]);
+  fprintf(stderr, "0x" PTR "\n", trace[0]);
   // CHECK: [[ALLOC_FRAME_0:0x[0-9a-f]+]]
-  fprintf(stderr, "0x%lx\n", trace[1]);
+  fprintf(stderr, "0x" PTR "\n", trace[1]);
   // CHECK: [[ALLOC_FRAME_1:0x[0-9a-f]+]]
 
   num_frames = 100;
@@ -48,9 +54,9 @@
   // CHECK: free stack retval ok
   fprintf(stderr, "thread id = %d\n", thread_id);
   // CHECK: thread id = 0
-  fprintf(stderr, "0x%lx\n", trace[0]);
+  fprintf(stderr, "0x" PTR "\n", trace[0]);
   // CHECK: [[FREE_FRAME_0:0x[0-9a-f]+]]
-  fprintf(stderr, "0x%lx\n", trace[1]);
+  fprintf(stderr, "0x" PTR "\n", trace[1]);
   // CHECK: [[FREE_FRAME_1:0x[0-9a-f]+]]
 
   mem[0] = 'A'; // BOOM