Index: gcc/testsuite/gcc.dg/plugin/selfassign.c
===================================================================
--- gcc/testsuite/gcc.dg/plugin/selfassign.c	(revision 162051)
+++ gcc/testsuite/gcc.dg/plugin/selfassign.c	(working copy)
@@ -14,6 +14,7 @@
 #include "tree-pass.h"
 #include "intl.h"
 #include "plugin-version.h"
+#include "diagnostic.h"
 
 int plugin_is_GPL_compatible;
 
Index: gcc/testsuite/gcc.dg/plugin/ggcplug.c
===================================================================
--- gcc/testsuite/gcc.dg/plugin/ggcplug.c	(revision 162051)
+++ gcc/testsuite/gcc.dg/plugin/ggcplug.c	(working copy)
@@ -13,6 +13,7 @@
 #include "intl.h"
 #include "gcc-plugin.h"
 #include "plugin-version.h"
+#include "diagnostic.h"
 
 int plugin_is_GPL_compatible;
 
Index: gcc/testsuite/g++.dg/plugin/selfassign.c
===================================================================
--- gcc/testsuite/g++.dg/plugin/selfassign.c	(revision 162051)
+++ gcc/testsuite/g++.dg/plugin/selfassign.c	(working copy)
@@ -14,6 +14,7 @@
 #include "tree-pass.h"
 #include "intl.h"
 #include "plugin-version.h"
+#include "diagnostic.h"
 
 int plugin_is_GPL_compatible;
 
Index: gcc/testsuite/g++.dg/plugin/attribute_plugin.c
===================================================================
--- gcc/testsuite/g++.dg/plugin/attribute_plugin.c	(revision 162051)
+++ gcc/testsuite/g++.dg/plugin/attribute_plugin.c	(working copy)
@@ -10,6 +10,7 @@
 #include "intl.h"
 #include "toplev.h"
 #include "plugin.h"
+#include "diagnostic.h"
 
 int plugin_is_GPL_compatible;
 
Index: gcc/testsuite/g++.dg/plugin/dumb_plugin.c
===================================================================
--- gcc/testsuite/g++.dg/plugin/dumb_plugin.c	(revision 162051)
+++ gcc/testsuite/g++.dg/plugin/dumb_plugin.c	(working copy)
@@ -10,6 +10,7 @@
 #include "tree-pass.h"
 #include "intl.h"
 #include "toplev.h"
+#include "diagnostic.h"
 
 int plugin_is_GPL_compatible;
 
Index: gcc/testsuite/g++.dg/plugin/pragma_plugin.c
===================================================================
--- gcc/testsuite/g++.dg/plugin/pragma_plugin.c	(revision 162051)
+++ gcc/testsuite/g++.dg/plugin/pragma_plugin.c	(working copy)
@@ -14,6 +14,7 @@
 #include "tree-pass.h"
 #include "intl.h"
 #include "toplev.h"
+#include "diagnostic.h"
 
 int plugin_is_GPL_compatible;