diff --git a/gcc/testsuite/gcc.dg/graphite/id-15.c b/gcc/testsuite/gcc.dg/graphite/id-15.c
index d1cb2a2519b..d0a804c876b 100644
--- a/gcc/testsuite/gcc.dg/graphite/id-15.c
+++ b/gcc/testsuite/gcc.dg/graphite/id-15.c
@@ -1,3 +1,4 @@
+/* { dg-additional-options "-Wno-old-style-definition" } */
 /* { dg-require-effective-target int32plus } */
 
 typedef long unsigned int size_t;
diff --git a/gcc/testsuite/gcc.dg/graphite/pr38413.c b/gcc/testsuite/gcc.dg/graphite/pr38413.c
index 0ecccc7df60..877511c6ab2 100644
--- a/gcc/testsuite/gcc.dg/graphite/pr38413.c
+++ b/gcc/testsuite/gcc.dg/graphite/pr38413.c
@@ -1,4 +1,4 @@
-/* { dg-options "-O2 -fgraphite-identity" } */
+/* { dg-options "-O2 -fgraphite-identity -Wno-old-style-definition" } */
 
 static int qsz;
 
diff --git a/gcc/testsuite/gcc.dg/graphite/pr38510.c b/gcc/testsuite/gcc.dg/graphite/pr38510.c
index 8c7fcae39a9..f05c03df0f7 100644
--- a/gcc/testsuite/gcc.dg/graphite/pr38510.c
+++ b/gcc/testsuite/gcc.dg/graphite/pr38510.c
@@ -1,4 +1,4 @@
-/* { dg-options "-O2 -fgraphite-identity" } */
+/* { dg-options "-O2 -fgraphite-identity -Wno-old-style-definition" } */
 typedef long int integer;
 typedef double doublereal;