diff --git a/compiler-rt/test/asan/TestCases/report_error_summary.cpp b/compiler-rt/test/asan/TestCases/report_error_summary.cpp
--- a/compiler-rt/test/asan/TestCases/report_error_summary.cpp
+++ b/compiler-rt/test/asan/TestCases/report_error_summary.cpp
@@ -1,9 +1,12 @@
 // RUN: %clangxx_asan -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s
 
+// FIXME: Weak symbols aren't supported on Windows.
+// XFAIL: target={{.*windows-msvc.*}}
+
 #include <stdio.h>
 
 extern "C" void __sanitizer_report_error_summary(const char *summary) {
-  fprintf(stderr, "test_report_error_summary\n", summary);
+  fprintf(stderr, "test_report_error_summary\n");
   // CHECK: test_report_error_summary
   fflush(stderr);
 }