diff --git a/libstdc++-v3/testsuite/27_io/basic_filebuf/overflow/char/9182-2.cc b/libstdc++-v3/testsuite/27_io/basic_filebuf/overflow/char/9182-2.cc
index e388d51e3d8..f0018bb27b3 100644
--- a/libstdc++-v3/testsuite/27_io/basic_filebuf/overflow/char/9182-2.cc
+++ b/libstdc++-v3/testsuite/27_io/basic_filebuf/overflow/char/9182-2.cc
@@ -51,7 +51,8 @@ protected:
 void test14()
 {
   using namespace std;
-  
+  bool test __attribute__((unused)) = true;
+
   locale loc =  locale::classic();
   loc = locale(loc, new errorcvt);
   
diff --git a/libstdc++-v3/testsuite/27_io/basic_filebuf/seekoff/wchar_t/3.cc b/libstdc++-v3/testsuite/27_io/basic_filebuf/seekoff/wchar_t/3.cc
index 0ac55b5a826..9e5e83bf424 100644
--- a/libstdc++-v3/testsuite/27_io/basic_filebuf/seekoff/wchar_t/3.cc
+++ b/libstdc++-v3/testsuite/27_io/basic_filebuf/seekoff/wchar_t/3.cc
@@ -24,6 +24,7 @@
 void test03()
 {
   using namespace std;
+  bool test __attribute__((unused)) = true;
 
   const char* name = "tmp_seekoff_3";
 
diff --git a/libstdc++-v3/testsuite/27_io/basic_filebuf/seekpos/wchar_t/1.cc b/libstdc++-v3/testsuite/27_io/basic_filebuf/seekpos/wchar_t/1.cc
index dbaade3c979..94482cfa6bf 100644
--- a/libstdc++-v3/testsuite/27_io/basic_filebuf/seekpos/wchar_t/1.cc
+++ b/libstdc++-v3/testsuite/27_io/basic_filebuf/seekpos/wchar_t/1.cc
@@ -25,6 +25,7 @@
 void test01()
 {
   using namespace std;
+  bool test __attribute__((unused)) = true;
 
   const char* name = "tmp_seekpos_1";
 
diff --git a/libstdc++-v3/testsuite/27_io/basic_filebuf/sync/char/9182-1.cc b/libstdc++-v3/testsuite/27_io/basic_filebuf/sync/char/9182-1.cc
index bc5b3dc086d..c0546f9a63b 100644
--- a/libstdc++-v3/testsuite/27_io/basic_filebuf/sync/char/9182-1.cc
+++ b/libstdc++-v3/testsuite/27_io/basic_filebuf/sync/char/9182-1.cc
@@ -51,6 +51,7 @@ protected:
 void test13()
 {
   using namespace std;
+  bool test __attribute__((unused)) = true;
 
   locale loc =  locale::classic();
   loc = locale(loc, new errorcvt);