diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 2952d5cd5ef..687068b212c 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2017-06-28  Christophe Lyon  <christophe.lyon@linaro.org>
+
+	* gcc.dg/tree-ssa/copy-sign-1.c: Add c99_runtime effective target
+	and options.
+	* gcc.dg/tree-ssa/mult-abs-2.c: Likewise.
+
 2017-06-28  Marc Glisse  <marc.glisse@inria.fr>
 
 	* gcc.dg/tree-ssa/addadd.c: Remove test duplicated in addadd-2.c.
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/copy-sign-1.c b/gcc/testsuite/gcc.dg/tree-ssa/copy-sign-1.c
index 9ebdf509280..de3e7b242ce 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/copy-sign-1.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/copy-sign-1.c
@@ -1,5 +1,7 @@
-/* { dg-options "-O2 -ffast-math -fdump-tree-gimple" } */
 /* { dg-do compile } */
+/* { dg-require-effective-target c99_runtime } */
+/* { dg-options "-O2 -ffast-math -fdump-tree-gimple" } */
+/* { dg-add-options c99_runtime } */
 float f(float x)
 {
   return (x > 0.f ? -1.f : 1.f);
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/mult-abs-2.c b/gcc/testsuite/gcc.dg/tree-ssa/mult-abs-2.c
index b6a1a790eee..d74ba2fe630 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/mult-abs-2.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/mult-abs-2.c
@@ -1,5 +1,8 @@
-/* { dg-options "-O2 -ffast-math -fdump-tree-gimple" } */
 /* { dg-do compile } */
+/* { dg-require-effective-target c99_runtime } */
+/* { dg-options "-O2 -ffast-math -fdump-tree-gimple" } */
+/* { dg-add-options c99_runtime } */
+
 float f(float x)
 {
   return x * (x > 0.f ? -1.f : 1.f);