diff --git a/gcc/testsuite/gcc.dg/plugin/taint-CVE-2011-0521-5-fixed.c b/gcc/testsuite/gcc.dg/plugin/taint-CVE-2011-0521-5-fixed.c
index 8cb067c6542..2e74770a7a3 100644
--- a/gcc/testsuite/gcc.dg/plugin/taint-CVE-2011-0521-5-fixed.c
+++ b/gcc/testsuite/gcc.dg/plugin/taint-CVE-2011-0521-5-fixed.c
@@ -4,6 +4,9 @@
 /* { dg-options "-fanalyzer -fanalyzer-checker=taint --param=analyzer-max-svalue-depth=25" } */
 /* { dg-require-effective-target analyzer } */
 
+/* On darwin, system headers are fortified, which defeats the analysis.  Turn it off.  */
+/* { dg-additional-options "-D_FORTIFY_SOURCE=0" { target *-*-darwin* } } */
+
 /* See notes in this header.  */
 #include "taint-CVE-2011-0521.h"
 
diff --git a/gcc/testsuite/gcc.dg/plugin/taint-CVE-2011-0521-5.c b/gcc/testsuite/gcc.dg/plugin/taint-CVE-2011-0521-5.c
index 4ce047902d3..021d458b66e 100644
--- a/gcc/testsuite/gcc.dg/plugin/taint-CVE-2011-0521-5.c
+++ b/gcc/testsuite/gcc.dg/plugin/taint-CVE-2011-0521-5.c
@@ -4,6 +4,9 @@
 /* { dg-options "-fanalyzer -fanalyzer-checker=taint --param=analyzer-max-svalue-depth=25" } */
 /* { dg-require-effective-target analyzer } */
 
+/* On darwin, system headers are fortified, which defeats the analysis.  Turn it off.  */
+/* { dg-additional-options "-D_FORTIFY_SOURCE=0" { target *-*-darwin* } } */
+
 /* See notes in this header.  */
 #include "taint-CVE-2011-0521.h"
 
diff --git a/gcc/testsuite/gcc.dg/plugin/taint-CVE-2011-0521-6.c b/gcc/testsuite/gcc.dg/plugin/taint-CVE-2011-0521-6.c
index c54af790a56..f27e9eb5f02 100644
--- a/gcc/testsuite/gcc.dg/plugin/taint-CVE-2011-0521-6.c
+++ b/gcc/testsuite/gcc.dg/plugin/taint-CVE-2011-0521-6.c
@@ -4,6 +4,9 @@
 /* { dg-options "-fanalyzer -fanalyzer-checker=taint --param=analyzer-max-svalue-depth=25" } */
 /* { dg-require-effective-target analyzer } */
 
+/* On darwin, system headers are fortified, which defeats the analysis.  Turn it off.  */
+/* { dg-additional-options "-D_FORTIFY_SOURCE=0" { target *-*-darwin* } } */
+
 /* See notes in this header.  */
 #include "taint-CVE-2011-0521.h"