diff --git a/libstdc++-v3/include/debug/assertions.h b/libstdc++-v3/include/debug/assertions.h
index 57c0ab2c3cf..fcc910c7396 100644
--- a/libstdc++-v3/include/debug/assertions.h
+++ b/libstdc++-v3/include/debug/assertions.h
@@ -43,6 +43,8 @@
 # define __glibcxx_requires_non_empty_range(_First,_Last)
 # define __glibcxx_requires_nonempty()
 # define __glibcxx_requires_subscript(_N)
+# define __glibcxx_requires_string(_String)
+# define __glibcxx_requires_string_len(_String,_Len)
 #else
 
 // Verify that [_First, _Last) forms a non-empty iterator range.
@@ -53,6 +55,22 @@
 // Verify that the container is nonempty
 # define __glibcxx_requires_nonempty()		\
   __glibcxx_assert(!this->empty())
+# ifdef _GLIBCXX_DEBUG_PEDANTIC
+#  if __cplusplus < 201103L
+#   define __glibcxx_requires_string(_String)	\
+  __glibcxx_assert(_String != 0)
+#   define __glibcxx_requires_string_len(_String,_Len)	\
+  __glibcxx_assert(_String != 0 || _Len == 0)
+#  else
+#   define __glibcxx_requires_string(_String)	\
+  __glibcxx_assert(_String != nullptr)
+#   define __glibcxx_requires_string_len(_String,_Len)	\
+  __glibcxx_assert(_String != nullptr || _Len == 0)
+#  endif // C++11
+# else
+#  define __glibcxx_requires_string(_String)
+#  define __glibcxx_requires_string_len(_String,_Len)
+# endif // _GLIBCXX_DEBUG_PEDANTIC
 #endif
 
 #ifdef _GLIBCXX_DEBUG
diff --git a/libstdc++-v3/include/debug/debug.h b/libstdc++-v3/include/debug/debug.h
index f4233760426..5593b4fe92c 100644
--- a/libstdc++-v3/include/debug/debug.h
+++ b/libstdc++-v3/include/debug/debug.h
@@ -78,8 +78,6 @@ namespace __gnu_debug
 # define __glibcxx_requires_partitioned_upper_pred(_First,_Last,_Value,_Pred)
 # define __glibcxx_requires_heap(_First,_Last)
 # define __glibcxx_requires_heap_pred(_First,_Last,_Pred)
-# define __glibcxx_requires_string(_String)
-# define __glibcxx_requires_string_len(_String,_Len)
 # define __glibcxx_requires_irreflexive(_First,_Last)
 # define __glibcxx_requires_irreflexive2(_First,_Last)
 # define __glibcxx_requires_irreflexive_pred(_First,_Last,_Pred)
@@ -118,17 +116,6 @@ namespace __gnu_debug
   __glibcxx_check_heap(_First,_Last)
 # define __glibcxx_requires_heap_pred(_First,_Last,_Pred)	\
   __glibcxx_check_heap_pred(_First,_Last,_Pred)
-# if __cplusplus < 201103L
-#  define __glibcxx_requires_string(_String)	\
-  _GLIBCXX_DEBUG_PEDASSERT(_String != 0)
-#  define __glibcxx_requires_string_len(_String,_Len)	\
-  _GLIBCXX_DEBUG_PEDASSERT(_String != 0 || _Len == 0)
-# else
-#  define __glibcxx_requires_string(_String)	\
-  _GLIBCXX_DEBUG_PEDASSERT(_String != nullptr)
-#  define __glibcxx_requires_string_len(_String,_Len)	\
-  _GLIBCXX_DEBUG_PEDASSERT(_String != nullptr || _Len == 0)
-# endif
 # define __glibcxx_requires_irreflexive(_First,_Last)	\
   __glibcxx_check_irreflexive(_First,_Last)
 # define __glibcxx_requires_irreflexive2(_First,_Last)	\
diff --git a/libstdc++-v3/testsuite/21_strings/basic_string/operations/ends_with/char_neg.cc b/libstdc++-v3/testsuite/21_strings/basic_string/operations/ends_with/char_neg.cc
index 7a7b8dd077d..6080ddc0555 100644
--- a/libstdc++-v3/testsuite/21_strings/basic_string/operations/ends_with/char_neg.cc
+++ b/libstdc++-v3/testsuite/21_strings/basic_string/operations/ends_with/char_neg.cc
@@ -15,7 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 //
-// { dg-options "-std=gnu++2a -O0" }
+// { dg-options "-std=gnu++2a -D_GLIBCXX_ASSERTIONS" }
 // { dg-do run { target c++2a xfail *-*-* } }
 
 #define _GLIBCXX_DEBUG_PEDANTIC
diff --git a/libstdc++-v3/testsuite/21_strings/basic_string/operations/ends_with/wchar_t_neg.cc b/libstdc++-v3/testsuite/21_strings/basic_string/operations/ends_with/wchar_t_neg.cc
index a6881bf406b..61d43558a74 100644
--- a/libstdc++-v3/testsuite/21_strings/basic_string/operations/ends_with/wchar_t_neg.cc
+++ b/libstdc++-v3/testsuite/21_strings/basic_string/operations/ends_with/wchar_t_neg.cc
@@ -15,7 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 //
-// { dg-options "-std=gnu++2a -O0" }
+// { dg-options "-std=gnu++2a -D_GLIBCXX_ASSERTIONS" }
 // { dg-do run { target c++2a xfail *-*-* } }
 
 #define _GLIBCXX_DEBUG_PEDANTIC
diff --git a/libstdc++-v3/testsuite/21_strings/basic_string/operations/starts_with/char_neg.cc b/libstdc++-v3/testsuite/21_strings/basic_string/operations/starts_with/char_neg.cc
index f357aef2289..e1cc8bad525 100644
--- a/libstdc++-v3/testsuite/21_strings/basic_string/operations/starts_with/char_neg.cc
+++ b/libstdc++-v3/testsuite/21_strings/basic_string/operations/starts_with/char_neg.cc
@@ -15,7 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 //
-// { dg-options "-std=gnu++2a -O0" }
+// { dg-options "-std=gnu++2a -D_GLIBCXX_ASSERTIONS" }
 // { dg-do run { target c++2a xfail *-*-* } }
 
 #define _GLIBCXX_DEBUG_PEDANTIC
diff --git a/libstdc++-v3/testsuite/21_strings/basic_string/operations/starts_with/wchar_t_neg.cc b/libstdc++-v3/testsuite/21_strings/basic_string/operations/starts_with/wchar_t_neg.cc
index 90065a459b6..8fc39bbd63c 100644
--- a/libstdc++-v3/testsuite/21_strings/basic_string/operations/starts_with/wchar_t_neg.cc
+++ b/libstdc++-v3/testsuite/21_strings/basic_string/operations/starts_with/wchar_t_neg.cc
@@ -15,7 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 //
-// { dg-options "-std=gnu++2a -O0" }
+// { dg-options "-std=gnu++2a -D_GLIBCXX_ASSERTIONS" }
 // { dg-do run { target c++2a xfail *-*-* } }
 
 #define _GLIBCXX_DEBUG_PEDANTIC