libstdc++: Remove dg-options "-std=gnu++20" from 20_utils tests

The testsuite will automatically select C++20 for these tests now, and
removing the hardcoded -std option allows them to be tested for C++23
and C++26 as well.

libstdc++-v3/ChangeLog:

	* testsuite/20_util/allocator/105975.cc: Remove dg-options
	-std=gnu++2a.
	* testsuite/20_util/allocator/rebind_c++20.cc: Likewise.
	* testsuite/20_util/allocator/requirements/constexpr.cc:
	Likewise.
	* testsuite/20_util/allocator/requirements/typedefs_c++20.cc:
	Likewise.
	* testsuite/20_util/allocator_traits/header-2.cc: Likewise.
	* testsuite/20_util/allocator_traits/header.cc: Likewise.
	* testsuite/20_util/allocator_traits/members/92878_92947.cc:
	Likewise.
	* testsuite/20_util/any/assign/92878_92947.cc: Likewise.
	* testsuite/20_util/any/cons/92878_92947.cc: Likewise.
	* testsuite/20_util/assume_aligned/1.cc: Likewise.
	* testsuite/20_util/assume_aligned/2_neg.cc: Likewise.
	* testsuite/20_util/assume_aligned/3.cc: Likewise.
	* testsuite/20_util/assume_aligned/97132.cc: Likewise.
	* testsuite/20_util/bind/constexpr.cc: Likewise.
	* testsuite/20_util/bitset/operations/96303.cc: Likewise.
	* testsuite/20_util/common_reference/100894.cc: Likewise.
	* testsuite/20_util/common_reference/requirements/alias_decl.cc:
	Likewise.
	* testsuite/20_util/common_reference/requirements/explicit_instantiation.cc:
	Likewise.
	* testsuite/20_util/common_reference/requirements/typedefs.cc:
	Likewise.
	* testsuite/20_util/duration/comparison_operators/three_way.cc:
	Likewise.
	* testsuite/20_util/exchange/constexpr.cc: Likewise.
	* testsuite/20_util/exchange/noexcept.cc: Likewise.
	* testsuite/20_util/from_chars/1_c++20_neg.cc: Likewise.
	* testsuite/20_util/from_chars/compare.cc: Likewise.
	* testsuite/20_util/function_objects/bind_front/1.cc: Likewise.
	* testsuite/20_util/function_objects/bind_front/107784.cc:
	Likewise.
	* testsuite/20_util/function_objects/bind_front/111327.cc:
	Likewise.
	* testsuite/20_util/function_objects/bind_front/2.cc: Likewise.
	* testsuite/20_util/function_objects/bind_front/97101.cc:
	Likewise.
	* testsuite/20_util/function_objects/bind_front/constexpr.cc:
	Likewise.
	* testsuite/20_util/function_objects/constexpr_searcher.cc:
	Likewise.
	* testsuite/20_util/function_objects/identity/1.cc: Likewise.
	* testsuite/20_util/function_objects/invoke/constexpr.cc:
	Likewise.
	* testsuite/20_util/function_objects/mem_fn/constexpr.cc:
	Likewise.
	* testsuite/20_util/function_objects/not_fn/constexpr.cc:
	Likewise.
	* testsuite/20_util/integer_comparisons/1.cc: Likewise.
	* testsuite/20_util/integer_comparisons/2.cc: Likewise.
	* testsuite/20_util/integer_comparisons/equal.cc: Likewise.
	* testsuite/20_util/integer_comparisons/equal_neg.cc: Likewise.
	* testsuite/20_util/integer_comparisons/greater.cc: Likewise.
	* testsuite/20_util/integer_comparisons/greater_equal.cc:
	Likewise.
	* testsuite/20_util/integer_comparisons/greater_equal_neg.cc:
	Likewise.
	* testsuite/20_util/integer_comparisons/greater_neg.cc:
	Likewise.
	* testsuite/20_util/integer_comparisons/in_range.cc: Likewise.
	* testsuite/20_util/integer_comparisons/in_range_neg.cc:
	Likewise.
	* testsuite/20_util/integer_comparisons/less.cc: Likewise.
	* testsuite/20_util/integer_comparisons/less_equal.cc: Likewise.
	* testsuite/20_util/integer_comparisons/less_equal_neg.cc:
	Likewise.
	* testsuite/20_util/integer_comparisons/less_neg.cc: Likewise.
	* testsuite/20_util/integer_comparisons/not_equal.cc: Likewise.
	* testsuite/20_util/integer_comparisons/not_equal_neg.cc:
	Likewise.
	* testsuite/20_util/is_bounded_array/requirements/explicit_instantiation.cc:
	Likewise.
	* testsuite/20_util/is_bounded_array/requirements/typedefs.cc:
	Likewise.
	* testsuite/20_util/is_bounded_array/value.cc: Likewise.
	* testsuite/20_util/is_constant_evaluated/1.cc: Likewise.
	* testsuite/20_util/is_constant_evaluated/noexcept.cc: Likewise.
	* testsuite/20_util/is_constructible/92878_92947.cc: Likewise.
	* testsuite/20_util/is_layout_compatible/is_corresponding_member.cc:
	Likewise.
	* testsuite/20_util/is_layout_compatible/value.cc: Likewise.
	* testsuite/20_util/is_layout_compatible/version.cc: Likewise.
	* testsuite/20_util/is_nothrow_constructible/value_c++20.cc:
	Likewise.
	* testsuite/20_util/is_nothrow_convertible/requirements/explicit_instantiation.cc:
	Likewise.
	* testsuite/20_util/is_nothrow_convertible/requirements/typedefs.cc:
	Likewise.
	* testsuite/20_util/is_nothrow_convertible/value.cc: Likewise.
	* testsuite/20_util/is_pod/deprecated-2a.cc: Likewise.
	* testsuite/20_util/is_pointer_interconvertible/value.cc:
	Likewise.
	* testsuite/20_util/is_pointer_interconvertible/version.cc:
	Likewise.
	* testsuite/20_util/is_pointer_interconvertible/with_class.cc:
	Likewise.
	* testsuite/20_util/is_unbounded_array/requirements/explicit_instantiation.cc:
	Likewise.
	* testsuite/20_util/is_unbounded_array/requirements/typedefs.cc:
	Likewise.
	* testsuite/20_util/is_unbounded_array/value.cc: Likewise.
	* testsuite/20_util/optional/assignment/92878_92947.cc:
	Likewise.
	* testsuite/20_util/optional/cons/92878_92947.cc: Likewise.
	* testsuite/20_util/optional/constexpr/assign.cc: Likewise.
	* testsuite/20_util/optional/constexpr/cons/conv.cc: Likewise.
	* testsuite/20_util/optional/constexpr/modifiers.cc: Likewise.
	* testsuite/20_util/optional/constexpr/swap.cc: Likewise.
	* testsuite/20_util/optional/relops/96269.cc: Likewise.
	* testsuite/20_util/optional/relops/three_way.cc: Likewise.
	* testsuite/20_util/pair/comparison_operators/constexpr_c++20.cc:
	Likewise.
	* testsuite/20_util/pair/cons/92878_92947.cc: Likewise.
	* testsuite/20_util/pair/constexpr_assign.cc: Likewise.
	* testsuite/20_util/pair/constexpr_swap.cc: Likewise.
	* testsuite/20_util/pair/requirements/structural.cc: Likewise.
	* testsuite/20_util/pointer_traits/pointer_to_constexpr.cc:
	Likewise.
	* testsuite/20_util/polymorphic_allocator/allocate_object.cc:
	Likewise.
	* testsuite/20_util/polymorphic_allocator/construct_c++2a.cc:
	Likewise.
	* testsuite/20_util/polymorphic_allocator/lwg3237.cc: Likewise.
	* testsuite/20_util/reference_wrapper/constexpr.cc: Likewise.
	* testsuite/20_util/reference_wrapper/incomplete.cc: Likewise.
	* testsuite/20_util/remove_cvref/requirements/alias_decl.cc:
	Likewise.
	* testsuite/20_util/remove_cvref/requirements/explicit_instantiation.cc:
	Likewise.
	* testsuite/20_util/remove_cvref/value.cc: Likewise.
	* testsuite/20_util/scoped_allocator/construct_pair_c++2a.cc:
	Likewise.
	* testsuite/20_util/shared_ptr/atomic/atomic_shared_ptr.cc:
	Likewise.
	* testsuite/20_util/shared_ptr/casts/rval.cc: Likewise.
	* testsuite/20_util/shared_ptr/comparison/cmp_c++20.cc:
	Likewise.
	* testsuite/20_util/shared_ptr/cons/alias-rval.cc: Likewise.
	* testsuite/20_util/shared_ptr/creation/92878_92947.cc:
	Likewise.
	* testsuite/20_util/shared_ptr/creation/array.cc: Likewise.
	* testsuite/20_util/shared_ptr/creation/overwrite.cc: Likewise.
	* testsuite/20_util/shared_ptr/creation/version.cc: Likewise.
	* testsuite/20_util/time_point/4.cc: Likewise.
	* testsuite/20_util/time_point/comparison_operators/three_way.cc:
	Likewise.
	* testsuite/20_util/to_address/1.cc: Likewise.
	* testsuite/20_util/to_address/1_neg.cc: Likewise.
	* testsuite/20_util/to_address/debug.cc: Likewise.
	* testsuite/20_util/to_address/lwg3545.cc: Likewise.
	* testsuite/20_util/to_chars/compare.cc: Likewise.
	* testsuite/20_util/tuple/comparison_operators/three_way.cc:
	Likewise.
	* testsuite/20_util/tuple/cons/102270.cc: Likewise.
	* testsuite/20_util/tuple/cons/constexpr_allocator_arg_t.cc:
	Likewise.
	* testsuite/20_util/tuple/constexpr_swap.cc: Likewise.
	* testsuite/20_util/type_identity/requirements/alias_decl.cc:
	Likewise.
	* testsuite/20_util/type_identity/requirements/explicit_instantiation.cc:
	Likewise.
	* testsuite/20_util/type_identity/requirements/typedefs.cc:
	Likewise.
	* testsuite/20_util/typeindex/comparison_operators_c++20.cc:
	Likewise.
	* testsuite/20_util/unique_ptr/comparison/compare_c++20.cc:
	Likewise.
	* testsuite/20_util/unique_ptr/creation/92878_92947.cc:
	Likewise.
	* testsuite/20_util/unique_ptr/creation/for_overwrite.cc:
	Likewise.
	* testsuite/20_util/unique_ptr/creation/for_overwrite__neg.cc:
	Likewise.
	* testsuite/20_util/unique_ptr/io/lwg2948.cc: Likewise.
	* testsuite/20_util/unwrap_reference/1.cc: Likewise.
	* testsuite/20_util/unwrap_reference/2.cc: Likewise.
	* testsuite/20_util/unwrap_reference/3.cc: Likewise.
	* testsuite/20_util/uses_allocator/92878_92947.cc: Likewise.
	* testsuite/20_util/uses_allocator/lwg3527.cc: Likewise.
	* testsuite/20_util/uses_allocator/make_obj.cc: Likewise.
	* testsuite/20_util/uses_allocator/uninitialized_construct.cc:
	Likewise.
	* testsuite/20_util/variant/92878_92947.cc: Likewise.
	* testsuite/20_util/variant/95915.cc: Likewise.
	* testsuite/20_util/variant/constexpr.cc: Likewise.
	* testsuite/20_util/variant/relops/three_way.cc: Likewise.
	* testsuite/20_util/variant/visit_neg.cc: Likewise.
	* testsuite/20_util/variant/visit_r.cc: Likewise.
	* testsuite/20_util/weak_ptr/atomic_weak_ptr.cc: Likewise.

136 files changed, 108 insertions, 239 deletions

diff --git a/libstdc++-v3/testsuite/20_util/allocator/105975.cc b/libstdc++-v3/testsuite/20_util/allocator/105975.cc
index 09f27ba..4866ae6 100644
--- a/libstdc++-v3/testsuite/20_util/allocator/105975.cc
+++ b/libstdc++-v3/testsuite/20_util/allocator/105975.cc
@@ -1,4 +1,3 @@
-// { dg-options "-std=gnu++20" }
 // { dg-do compile { target c++20 } }
 // { dg-require-effective-target hosted }
 
diff --git a/libstdc++-v3/testsuite/20_util/allocator/rebind_c++20.cc b/libstdc++-v3/testsuite/20_util/allocator/rebind_c++20.cc
index bacd124..b26fa6f 100644
--- a/libstdc++-v3/testsuite/20_util/allocator/rebind_c++20.cc
+++ b/libstdc++-v3/testsuite/20_util/allocator/rebind_c++20.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 // { dg-require-effective-target hosted }
 
 #include <memory>
diff --git a/libstdc++-v3/testsuite/20_util/allocator/requirements/constexpr.cc b/libstdc++-v3/testsuite/20_util/allocator/requirements/constexpr.cc
index c7a8e27..2102c57 100644
--- a/libstdc++-v3/testsuite/20_util/allocator/requirements/constexpr.cc
+++ b/libstdc++-v3/testsuite/20_util/allocator/requirements/constexpr.cc
@@ -15,7 +15,6 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++20" }
 // { dg-do compile { target c++20 } }
 // { dg-require-effective-target hosted }
 
diff --git a/libstdc++-v3/testsuite/20_util/allocator/requirements/typedefs_c++20.cc b/libstdc++-v3/testsuite/20_util/allocator/requirements/typedefs_c++20.cc
index dc19141..f7b1e20 100644
--- a/libstdc++-v3/testsuite/20_util/allocator/requirements/typedefs_c++20.cc
+++ b/libstdc++-v3/testsuite/20_util/allocator/requirements/typedefs_c++20.cc
@@ -15,7 +15,6 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++20" }
 // { dg-do compile { target c++20 } }
 // { dg-require-effective-target hosted }
 
diff --git a/libstdc++-v3/testsuite/20_util/allocator_traits/header-2.cc b/libstdc++-v3/testsuite/20_util/allocator_traits/header-2.cc
index 8ba0c94..9393d8a 100644
--- a/libstdc++-v3/testsuite/20_util/allocator_traits/header-2.cc
+++ b/libstdc++-v3/testsuite/20_util/allocator_traits/header-2.cc
@@ -15,7 +15,6 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++20" }
 // { dg-do compile { target c++20 } }
 // { dg-require-effective-target hosted }
 
diff --git a/libstdc++-v3/testsuite/20_util/allocator_traits/header.cc b/libstdc++-v3/testsuite/20_util/allocator_traits/header.cc
index f500f74..4a88aba 100644
--- a/libstdc++-v3/testsuite/20_util/allocator_traits/header.cc
+++ b/libstdc++-v3/testsuite/20_util/allocator_traits/header.cc
@@ -15,7 +15,6 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++20" }
 // { dg-do compile { target c++20 } }
 // { dg-require-effective-target hosted }
 
diff --git a/libstdc++-v3/testsuite/20_util/allocator_traits/members/92878_92947.cc b/libstdc++-v3/testsuite/20_util/allocator_traits/members/92878_92947.cc
index 6e3bb54..794138a 100644
--- a/libstdc++-v3/testsuite/20_util/allocator_traits/members/92878_92947.cc
+++ b/libstdc++-v3/testsuite/20_util/allocator_traits/members/92878_92947.cc
@@ -1,4 +1,3 @@
-// { dg-options "-std=gnu++20" }
 // { dg-do run { target c++20 } }
 // { dg-require-effective-target hosted }
 
diff --git a/libstdc++-v3/testsuite/20_util/any/assign/92878_92947.cc b/libstdc++-v3/testsuite/20_util/any/assign/92878_92947.cc
index cf4cffe..5a6122e 100644
--- a/libstdc++-v3/testsuite/20_util/any/assign/92878_92947.cc
+++ b/libstdc++-v3/testsuite/20_util/any/assign/92878_92947.cc
@@ -1,5 +1,4 @@
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 // Copyright (C) 2020-2023 Free Software Foundation, Inc.
 //
 // This file is part of the GNU ISO C++ Library.  This library is free
diff --git a/libstdc++-v3/testsuite/20_util/any/cons/92878_92947.cc b/libstdc++-v3/testsuite/20_util/any/cons/92878_92947.cc
index 76d11ec..eebd7ec 100644
--- a/libstdc++-v3/testsuite/20_util/any/cons/92878_92947.cc
+++ b/libstdc++-v3/testsuite/20_util/any/cons/92878_92947.cc
@@ -1,5 +1,4 @@
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 
 // Copyright (C) 2020-2023 Free Software Foundation, Inc.
 //
diff --git a/libstdc++-v3/testsuite/20_util/assume_aligned/1.cc b/libstdc++-v3/testsuite/20_util/assume_aligned/1.cc
index 0272541..d131444 100644
--- a/libstdc++-v3/testsuite/20_util/assume_aligned/1.cc
+++ b/libstdc++-v3/testsuite/20_util/assume_aligned/1.cc
@@ -15,8 +15,8 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a -O2" }
-// { dg-do run { target c++2a } }
+// { dg-options "-O2" }
+// { dg-do run { target c++20 } }
 
 #include <memory>
 #include <cstdint>
diff --git a/libstdc++-v3/testsuite/20_util/assume_aligned/2_neg.cc b/libstdc++-v3/testsuite/20_util/assume_aligned/2_neg.cc
index 4cd8371..82a7bd6 100644
--- a/libstdc++-v3/testsuite/20_util/assume_aligned/2_neg.cc
+++ b/libstdc++-v3/testsuite/20_util/assume_aligned/2_neg.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <memory>
 
diff --git a/libstdc++-v3/testsuite/20_util/assume_aligned/3.cc b/libstdc++-v3/testsuite/20_util/assume_aligned/3.cc
index 7bd60fb..4337dae 100644
--- a/libstdc++-v3/testsuite/20_util/assume_aligned/3.cc
+++ b/libstdc++-v3/testsuite/20_util/assume_aligned/3.cc
@@ -15,8 +15,8 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a -O2 -g0" }
-// { dg-do compile { target c++2a } }
+// { dg-options "-O2 -g0" }
+// { dg-do compile { target c++20 } }
 // { dg-final { scan-assembler-not "undefined" } }
 
 #include <memory>
diff --git a/libstdc++-v3/testsuite/20_util/assume_aligned/97132.cc b/libstdc++-v3/testsuite/20_util/assume_aligned/97132.cc
index c928581..2c8b33b 100644
--- a/libstdc++-v3/testsuite/20_util/assume_aligned/97132.cc
+++ b/libstdc++-v3/testsuite/20_util/assume_aligned/97132.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <memory>
 
diff --git a/libstdc++-v3/testsuite/20_util/bind/constexpr.cc b/libstdc++-v3/testsuite/20_util/bind/constexpr.cc
index 483c7ab..1a1ecfe 100644
--- a/libstdc++-v3/testsuite/20_util/bind/constexpr.cc
+++ b/libstdc++-v3/testsuite/20_util/bind/constexpr.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <functional>
 
diff --git a/libstdc++-v3/testsuite/20_util/bitset/operations/96303.cc b/libstdc++-v3/testsuite/20_util/bitset/operations/96303.cc
index 13209e7..04ec2e7 100644
--- a/libstdc++-v3/testsuite/20_util/bitset/operations/96303.cc
+++ b/libstdc++-v3/testsuite/20_util/bitset/operations/96303.cc
@@ -15,8 +15,8 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a -pedantic" }
-// { dg-do compile { target c++2a } }
+// { dg-options "-pedantic" }
+// { dg-do compile { target c++20 } }
 
 // { dg-require-effective-target hosted }
 
diff --git a/libstdc++-v3/testsuite/20_util/common_reference/100894.cc b/libstdc++-v3/testsuite/20_util/common_reference/100894.cc
index 5e14476..d81b960 100644
--- a/libstdc++-v3/testsuite/20_util/common_reference/100894.cc
+++ b/libstdc++-v3/testsuite/20_util/common_reference/100894.cc
@@ -1,4 +1,3 @@
-// { dg-options "-std=gnu++20" }
 // { dg-do compile { target c++20 } }
 // PR libstdc++/100894 - common_reference implementation seems to be wrong
 
diff --git a/libstdc++-v3/testsuite/20_util/common_reference/requirements/alias_decl.cc b/libstdc++-v3/testsuite/20_util/common_reference/requirements/alias_decl.cc
index caaa942..83ba7c9 100644
--- a/libstdc++-v3/testsuite/20_util/common_reference/requirements/alias_decl.cc
+++ b/libstdc++-v3/testsuite/20_util/common_reference/requirements/alias_decl.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <type_traits>
 
diff --git a/libstdc++-v3/testsuite/20_util/common_reference/requirements/explicit_instantiation.cc b/libstdc++-v3/testsuite/20_util/common_reference/requirements/explicit_instantiation.cc
index e1d93ce..4c411c5 100644
--- a/libstdc++-v3/testsuite/20_util/common_reference/requirements/explicit_instantiation.cc
+++ b/libstdc++-v3/testsuite/20_util/common_reference/requirements/explicit_instantiation.cc
@@ -17,8 +17,7 @@
 
 // NB: This file is for testing type_traits with NO OTHER INCLUDES.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <type_traits>
 
diff --git a/libstdc++-v3/testsuite/20_util/common_reference/requirements/typedefs.cc b/libstdc++-v3/testsuite/20_util/common_reference/requirements/typedefs.cc
index 9cb8cfd..ac630c3 100644
--- a/libstdc++-v3/testsuite/20_util/common_reference/requirements/typedefs.cc
+++ b/libstdc++-v3/testsuite/20_util/common_reference/requirements/typedefs.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <type_traits>
 
diff --git a/libstdc++-v3/testsuite/20_util/duration/comparison_operators/three_way.cc b/libstdc++-v3/testsuite/20_util/duration/comparison_operators/three_way.cc
index 92993a7..0e268ef 100644
--- a/libstdc++-v3/testsuite/20_util/duration/comparison_operators/three_way.cc
+++ b/libstdc++-v3/testsuite/20_util/duration/comparison_operators/three_way.cc
@@ -1,5 +1,4 @@
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 
 // Copyright (C) 2020-2023 Free Software Foundation, Inc.
 //
diff --git a/libstdc++-v3/testsuite/20_util/exchange/constexpr.cc b/libstdc++-v3/testsuite/20_util/exchange/constexpr.cc
index 2ec1304..2a7d792 100644
--- a/libstdc++-v3/testsuite/20_util/exchange/constexpr.cc
+++ b/libstdc++-v3/testsuite/20_util/exchange/constexpr.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <utility>
 
diff --git a/libstdc++-v3/testsuite/20_util/exchange/noexcept.cc b/libstdc++-v3/testsuite/20_util/exchange/noexcept.cc
index 6363a4d..7e39a42 100644
--- a/libstdc++-v3/testsuite/20_util/exchange/noexcept.cc
+++ b/libstdc++-v3/testsuite/20_util/exchange/noexcept.cc
@@ -1,5 +1,4 @@
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <utility>
 
diff --git a/libstdc++-v3/testsuite/20_util/from_chars/1_c++20_neg.cc b/libstdc++-v3/testsuite/20_util/from_chars/1_c++20_neg.cc
index 5f94a1b..04d9ba6 100644
--- a/libstdc++-v3/testsuite/20_util/from_chars/1_c++20_neg.cc
+++ b/libstdc++-v3/testsuite/20_util/from_chars/1_c++20_neg.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <charconv>
 
diff --git a/libstdc++-v3/testsuite/20_util/from_chars/compare.cc b/libstdc++-v3/testsuite/20_util/from_chars/compare.cc
index 31a5c69..8e728f2 100644
--- a/libstdc++-v3/testsuite/20_util/from_chars/compare.cc
+++ b/libstdc++-v3/testsuite/20_util/from_chars/compare.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 
 #include <charconv>
 #include <testsuite_hooks.h>
diff --git a/libstdc++-v3/testsuite/20_util/function_objects/bind_front/1.cc b/libstdc++-v3/testsuite/20_util/function_objects/bind_front/1.cc
index 3aacf06..8a8c11a 100644
--- a/libstdc++-v3/testsuite/20_util/function_objects/bind_front/1.cc
+++ b/libstdc++-v3/testsuite/20_util/function_objects/bind_front/1.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 
 #include <functional>
 #include <testsuite_hooks.h>
diff --git a/libstdc++-v3/testsuite/20_util/function_objects/bind_front/107784.cc b/libstdc++-v3/testsuite/20_util/function_objects/bind_front/107784.cc
index f1f8cee..e8b4526 100644
--- a/libstdc++-v3/testsuite/20_util/function_objects/bind_front/107784.cc
+++ b/libstdc++-v3/testsuite/20_util/function_objects/bind_front/107784.cc
@@ -1,4 +1,3 @@
-// { dg-options "-std=gnu++20" }
 // { dg-do compile { target c++20 } }
 
 #include <functional>
diff --git a/libstdc++-v3/testsuite/20_util/function_objects/bind_front/111327.cc b/libstdc++-v3/testsuite/20_util/function_objects/bind_front/111327.cc
index fcfb9f9c..43b56ca 100644
--- a/libstdc++-v3/testsuite/20_util/function_objects/bind_front/111327.cc
+++ b/libstdc++-v3/testsuite/20_util/function_objects/bind_front/111327.cc
@@ -1,6 +1,5 @@
 // PR libstdc++/111327 - std::bind_front (and std::not_fn) doesn't always
 // perfectly forward according to value category of the call wrapper object
-// { dg-options "-std=gnu++20" }
 // { dg-do compile { target c++20 } }
 
 #include <functional>
diff --git a/libstdc++-v3/testsuite/20_util/function_objects/bind_front/2.cc b/libstdc++-v3/testsuite/20_util/function_objects/bind_front/2.cc
index 745a62d..0ea8926 100644
--- a/libstdc++-v3/testsuite/20_util/function_objects/bind_front/2.cc
+++ b/libstdc++-v3/testsuite/20_util/function_objects/bind_front/2.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 
 #include <functional>
 #include <memory>
diff --git a/libstdc++-v3/testsuite/20_util/function_objects/bind_front/97101.cc b/libstdc++-v3/testsuite/20_util/function_objects/bind_front/97101.cc
index 6880a31..98eab16 100644
--- a/libstdc++-v3/testsuite/20_util/function_objects/bind_front/97101.cc
+++ b/libstdc++-v3/testsuite/20_util/function_objects/bind_front/97101.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <functional>
 
diff --git a/libstdc++-v3/testsuite/20_util/function_objects/bind_front/constexpr.cc b/libstdc++-v3/testsuite/20_util/function_objects/bind_front/constexpr.cc
index 3d0d983..ef71b91 100644
--- a/libstdc++-v3/testsuite/20_util/function_objects/bind_front/constexpr.cc
+++ b/libstdc++-v3/testsuite/20_util/function_objects/bind_front/constexpr.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <functional>
 
diff --git a/libstdc++-v3/testsuite/20_util/function_objects/constexpr_searcher.cc b/libstdc++-v3/testsuite/20_util/function_objects/constexpr_searcher.cc
index dbe1381..aa1e23b 100644
--- a/libstdc++-v3/testsuite/20_util/function_objects/constexpr_searcher.cc
+++ b/libstdc++-v3/testsuite/20_util/function_objects/constexpr_searcher.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <functional>
 
diff --git a/libstdc++-v3/testsuite/20_util/function_objects/identity/1.cc b/libstdc++-v3/testsuite/20_util/function_objects/identity/1.cc
index 443c607..f300869 100644
--- a/libstdc++-v3/testsuite/20_util/function_objects/identity/1.cc
+++ b/libstdc++-v3/testsuite/20_util/function_objects/identity/1.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <functional>
 
diff --git a/libstdc++-v3/testsuite/20_util/function_objects/invoke/constexpr.cc b/libstdc++-v3/testsuite/20_util/function_objects/invoke/constexpr.cc
index b039a6f..122e211 100644
--- a/libstdc++-v3/testsuite/20_util/function_objects/invoke/constexpr.cc
+++ b/libstdc++-v3/testsuite/20_util/function_objects/invoke/constexpr.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <functional>
 
diff --git a/libstdc++-v3/testsuite/20_util/function_objects/mem_fn/constexpr.cc b/libstdc++-v3/testsuite/20_util/function_objects/mem_fn/constexpr.cc
index 005558d..9da0dbd 100644
--- a/libstdc++-v3/testsuite/20_util/function_objects/mem_fn/constexpr.cc
+++ b/libstdc++-v3/testsuite/20_util/function_objects/mem_fn/constexpr.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <functional>
 
diff --git a/libstdc++-v3/testsuite/20_util/function_objects/not_fn/constexpr.cc b/libstdc++-v3/testsuite/20_util/function_objects/not_fn/constexpr.cc
index 1ebfd17..5ec139a 100644
--- a/libstdc++-v3/testsuite/20_util/function_objects/not_fn/constexpr.cc
+++ b/libstdc++-v3/testsuite/20_util/function_objects/not_fn/constexpr.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <functional>
 
diff --git a/libstdc++-v3/testsuite/20_util/integer_comparisons/1.cc b/libstdc++-v3/testsuite/20_util/integer_comparisons/1.cc
index c000fcb..245fec9 100644
--- a/libstdc++-v3/testsuite/20_util/integer_comparisons/1.cc
+++ b/libstdc++-v3/testsuite/20_util/integer_comparisons/1.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do preprocess { target c++2a } }
+// { dg-do preprocess { target c++20 } }
 
 #include <utility>
 
diff --git a/libstdc++-v3/testsuite/20_util/integer_comparisons/2.cc b/libstdc++-v3/testsuite/20_util/integer_comparisons/2.cc
index 856ee5f..3e2bf57 100644
--- a/libstdc++-v3/testsuite/20_util/integer_comparisons/2.cc
+++ b/libstdc++-v3/testsuite/20_util/integer_comparisons/2.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do preprocess { target c++2a } }
+// { dg-do preprocess { target c++20 } }
 
 #include <version>
 
diff --git a/libstdc++-v3/testsuite/20_util/integer_comparisons/equal.cc b/libstdc++-v3/testsuite/20_util/integer_comparisons/equal.cc
index b78b9f8..259c7a7 100644
--- a/libstdc++-v3/testsuite/20_util/integer_comparisons/equal.cc
+++ b/libstdc++-v3/testsuite/20_util/integer_comparisons/equal.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 
 #include <utility>
 #include <limits>
diff --git a/libstdc++-v3/testsuite/20_util/integer_comparisons/equal_neg.cc b/libstdc++-v3/testsuite/20_util/integer_comparisons/equal_neg.cc
index 9de63b6..bbecbb4 100644
--- a/libstdc++-v3/testsuite/20_util/integer_comparisons/equal_neg.cc
+++ b/libstdc++-v3/testsuite/20_util/integer_comparisons/equal_neg.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <utility>
 
diff --git a/libstdc++-v3/testsuite/20_util/integer_comparisons/greater.cc b/libstdc++-v3/testsuite/20_util/integer_comparisons/greater.cc
index e564d8d..c764d68 100644
--- a/libstdc++-v3/testsuite/20_util/integer_comparisons/greater.cc
+++ b/libstdc++-v3/testsuite/20_util/integer_comparisons/greater.cc
@@ -1,4 +1,3 @@
-// { dg-options "-std=gnu++20" }
 // { dg-do run { target c++20 } }
 
 #include <utility>
diff --git a/libstdc++-v3/testsuite/20_util/integer_comparisons/greater_equal.cc b/libstdc++-v3/testsuite/20_util/integer_comparisons/greater_equal.cc
index 5d943a9..0028eea 100644
--- a/libstdc++-v3/testsuite/20_util/integer_comparisons/greater_equal.cc
+++ b/libstdc++-v3/testsuite/20_util/integer_comparisons/greater_equal.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 
 #include <utility>
 #include <limits>
diff --git a/libstdc++-v3/testsuite/20_util/integer_comparisons/greater_equal_neg.cc b/libstdc++-v3/testsuite/20_util/integer_comparisons/greater_equal_neg.cc
index 1a6bc52e..b3e4bec 100644
--- a/libstdc++-v3/testsuite/20_util/integer_comparisons/greater_equal_neg.cc
+++ b/libstdc++-v3/testsuite/20_util/integer_comparisons/greater_equal_neg.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <utility>
 
diff --git a/libstdc++-v3/testsuite/20_util/integer_comparisons/greater_neg.cc b/libstdc++-v3/testsuite/20_util/integer_comparisons/greater_neg.cc
index d709775..fb064cf 100644
--- a/libstdc++-v3/testsuite/20_util/integer_comparisons/greater_neg.cc
+++ b/libstdc++-v3/testsuite/20_util/integer_comparisons/greater_neg.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <utility>
 
diff --git a/libstdc++-v3/testsuite/20_util/integer_comparisons/in_range.cc b/libstdc++-v3/testsuite/20_util/integer_comparisons/in_range.cc
index 78af767..b2c6320 100644
--- a/libstdc++-v3/testsuite/20_util/integer_comparisons/in_range.cc
+++ b/libstdc++-v3/testsuite/20_util/integer_comparisons/in_range.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 
 #include <utility>
 #include <limits>
diff --git a/libstdc++-v3/testsuite/20_util/integer_comparisons/in_range_neg.cc b/libstdc++-v3/testsuite/20_util/integer_comparisons/in_range_neg.cc
index 173f901..da85a56 100644
--- a/libstdc++-v3/testsuite/20_util/integer_comparisons/in_range_neg.cc
+++ b/libstdc++-v3/testsuite/20_util/integer_comparisons/in_range_neg.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <utility>
 
diff --git a/libstdc++-v3/testsuite/20_util/integer_comparisons/less.cc b/libstdc++-v3/testsuite/20_util/integer_comparisons/less.cc
index b8ac73c..0087e7b 100644
--- a/libstdc++-v3/testsuite/20_util/integer_comparisons/less.cc
+++ b/libstdc++-v3/testsuite/20_util/integer_comparisons/less.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 
 #include <utility>
 #include <limits>
diff --git a/libstdc++-v3/testsuite/20_util/integer_comparisons/less_equal.cc b/libstdc++-v3/testsuite/20_util/integer_comparisons/less_equal.cc
index 301d8cd..ee2ea84 100644
--- a/libstdc++-v3/testsuite/20_util/integer_comparisons/less_equal.cc
+++ b/libstdc++-v3/testsuite/20_util/integer_comparisons/less_equal.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 
 #include <utility>
 #include <limits>
diff --git a/libstdc++-v3/testsuite/20_util/integer_comparisons/less_equal_neg.cc b/libstdc++-v3/testsuite/20_util/integer_comparisons/less_equal_neg.cc
index 3d83f2e..c3d275f 100644
--- a/libstdc++-v3/testsuite/20_util/integer_comparisons/less_equal_neg.cc
+++ b/libstdc++-v3/testsuite/20_util/integer_comparisons/less_equal_neg.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <utility>
 
diff --git a/libstdc++-v3/testsuite/20_util/integer_comparisons/less_neg.cc b/libstdc++-v3/testsuite/20_util/integer_comparisons/less_neg.cc
index 6dcfda4..8e58e4a 100644
--- a/libstdc++-v3/testsuite/20_util/integer_comparisons/less_neg.cc
+++ b/libstdc++-v3/testsuite/20_util/integer_comparisons/less_neg.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <utility>
 
diff --git a/libstdc++-v3/testsuite/20_util/integer_comparisons/not_equal.cc b/libstdc++-v3/testsuite/20_util/integer_comparisons/not_equal.cc
index afe2e12..0c658d2 100644
--- a/libstdc++-v3/testsuite/20_util/integer_comparisons/not_equal.cc
+++ b/libstdc++-v3/testsuite/20_util/integer_comparisons/not_equal.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 
 #include <utility>
 #include <limits>
diff --git a/libstdc++-v3/testsuite/20_util/integer_comparisons/not_equal_neg.cc b/libstdc++-v3/testsuite/20_util/integer_comparisons/not_equal_neg.cc
index 9de63b6..bbecbb4 100644
--- a/libstdc++-v3/testsuite/20_util/integer_comparisons/not_equal_neg.cc
+++ b/libstdc++-v3/testsuite/20_util/integer_comparisons/not_equal_neg.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <utility>
 
diff --git a/libstdc++-v3/testsuite/20_util/is_bounded_array/requirements/explicit_instantiation.cc b/libstdc++-v3/testsuite/20_util/is_bounded_array/requirements/explicit_instantiation.cc
index f2a70f9..b3a9271 100644
--- a/libstdc++-v3/testsuite/20_util/is_bounded_array/requirements/explicit_instantiation.cc
+++ b/libstdc++-v3/testsuite/20_util/is_bounded_array/requirements/explicit_instantiation.cc
@@ -1,5 +1,4 @@
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 // Copyright (C) 2019-2023 Free Software Foundation, Inc.
 //
diff --git a/libstdc++-v3/testsuite/20_util/is_bounded_array/requirements/typedefs.cc b/libstdc++-v3/testsuite/20_util/is_bounded_array/requirements/typedefs.cc
index fe28761..6d77e3d 100644
--- a/libstdc++-v3/testsuite/20_util/is_bounded_array/requirements/typedefs.cc
+++ b/libstdc++-v3/testsuite/20_util/is_bounded_array/requirements/typedefs.cc
@@ -1,5 +1,4 @@
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 // Copyright (C) 2019-2023 Free Software Foundation, Inc.
 //
diff --git a/libstdc++-v3/testsuite/20_util/is_bounded_array/value.cc b/libstdc++-v3/testsuite/20_util/is_bounded_array/value.cc
index 32ed5f1..dd417cf 100644
--- a/libstdc++-v3/testsuite/20_util/is_bounded_array/value.cc
+++ b/libstdc++-v3/testsuite/20_util/is_bounded_array/value.cc
@@ -1,5 +1,4 @@
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 // Copyright (C) 2019-2023 Free Software Foundation, Inc.
 //
diff --git a/libstdc++-v3/testsuite/20_util/is_constant_evaluated/1.cc b/libstdc++-v3/testsuite/20_util/is_constant_evaluated/1.cc
index a8e115f..684f7d5 100644
--- a/libstdc++-v3/testsuite/20_util/is_constant_evaluated/1.cc
+++ b/libstdc++-v3/testsuite/20_util/is_constant_evaluated/1.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 
 #include <type_traits>
 #include <testsuite_hooks.h>
diff --git a/libstdc++-v3/testsuite/20_util/is_constant_evaluated/noexcept.cc b/libstdc++-v3/testsuite/20_util/is_constant_evaluated/noexcept.cc
index 2b9cd85..5973173 100644
--- a/libstdc++-v3/testsuite/20_util/is_constant_evaluated/noexcept.cc
+++ b/libstdc++-v3/testsuite/20_util/is_constant_evaluated/noexcept.cc
@@ -1,5 +1,4 @@
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 // Copyright (C) 2018-2023 Free Software Foundation, Inc.
 //
diff --git a/libstdc++-v3/testsuite/20_util/is_constructible/92878_92947.cc b/libstdc++-v3/testsuite/20_util/is_constructible/92878_92947.cc
index 9841d65..e45cc58 100644
--- a/libstdc++-v3/testsuite/20_util/is_constructible/92878_92947.cc
+++ b/libstdc++-v3/testsuite/20_util/is_constructible/92878_92947.cc
@@ -1,5 +1,4 @@
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 // Copyright (C) 2020-2023 Free Software Foundation, Inc.
 //
diff --git a/libstdc++-v3/testsuite/20_util/is_layout_compatible/is_corresponding_member.cc b/libstdc++-v3/testsuite/20_util/is_layout_compatible/is_corresponding_member.cc
index 69b359a..8969a1d 100644
--- a/libstdc++-v3/testsuite/20_util/is_layout_compatible/is_corresponding_member.cc
+++ b/libstdc++-v3/testsuite/20_util/is_layout_compatible/is_corresponding_member.cc
@@ -1,4 +1,3 @@
-// { dg-options "-std=gnu++20" }
 // { dg-do compile { target c++20 } }
 #include <type_traits>
 
diff --git a/libstdc++-v3/testsuite/20_util/is_layout_compatible/value.cc b/libstdc++-v3/testsuite/20_util/is_layout_compatible/value.cc
index 7686b34..6232f6a 100644
--- a/libstdc++-v3/testsuite/20_util/is_layout_compatible/value.cc
+++ b/libstdc++-v3/testsuite/20_util/is_layout_compatible/value.cc
@@ -1,4 +1,3 @@
-// { dg-options "-std=gnu++20" }
 // { dg-do compile { target c++20 } }
 #include <type_traits>
 
diff --git a/libstdc++-v3/testsuite/20_util/is_layout_compatible/version.cc b/libstdc++-v3/testsuite/20_util/is_layout_compatible/version.cc
index 3b2a8e1..be6079d 100644
--- a/libstdc++-v3/testsuite/20_util/is_layout_compatible/version.cc
+++ b/libstdc++-v3/testsuite/20_util/is_layout_compatible/version.cc
@@ -1,4 +1,3 @@
-// { dg-options "-std=gnu++20" }
 // { dg-do compile { target c++20 } }
 
 #include <version>
diff --git a/libstdc++-v3/testsuite/20_util/is_nothrow_constructible/value_c++20.cc b/libstdc++-v3/testsuite/20_util/is_nothrow_constructible/value_c++20.cc
index 46fea72..1137738 100644
--- a/libstdc++-v3/testsuite/20_util/is_nothrow_constructible/value_c++20.cc
+++ b/libstdc++-v3/testsuite/20_util/is_nothrow_constructible/value_c++20.cc
@@ -1,5 +1,4 @@
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 // Copyright (C) 2020-2023 Free Software Foundation, Inc.
 //
diff --git a/libstdc++-v3/testsuite/20_util/is_nothrow_convertible/requirements/explicit_instantiation.cc b/libstdc++-v3/testsuite/20_util/is_nothrow_convertible/requirements/explicit_instantiation.cc
index f6bb762..9b6594d 100644
--- a/libstdc++-v3/testsuite/20_util/is_nothrow_convertible/requirements/explicit_instantiation.cc
+++ b/libstdc++-v3/testsuite/20_util/is_nothrow_convertible/requirements/explicit_instantiation.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 // NB: This file is for testing type_traits with NO OTHER INCLUDES.
 
diff --git a/libstdc++-v3/testsuite/20_util/is_nothrow_convertible/requirements/typedefs.cc b/libstdc++-v3/testsuite/20_util/is_nothrow_convertible/requirements/typedefs.cc
index 6b42423..865ec04 100644
--- a/libstdc++-v3/testsuite/20_util/is_nothrow_convertible/requirements/typedefs.cc
+++ b/libstdc++-v3/testsuite/20_util/is_nothrow_convertible/requirements/typedefs.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 // NB: This file is for testing type_traits with NO OTHER INCLUDES.
 
diff --git a/libstdc++-v3/testsuite/20_util/is_nothrow_convertible/value.cc b/libstdc++-v3/testsuite/20_util/is_nothrow_convertible/value.cc
index 45f8f51..eec4f7f 100644
--- a/libstdc++-v3/testsuite/20_util/is_nothrow_convertible/value.cc
+++ b/libstdc++-v3/testsuite/20_util/is_nothrow_convertible/value.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <type_traits>
 #include <testsuite_tr1.h>
diff --git a/libstdc++-v3/testsuite/20_util/is_pod/deprecated-2a.cc b/libstdc++-v3/testsuite/20_util/is_pod/deprecated-2a.cc
index 7eb4562..cfb9433 100644
--- a/libstdc++-v3/testsuite/20_util/is_pod/deprecated-2a.cc
+++ b/libstdc++-v3/testsuite/20_util/is_pod/deprecated-2a.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <type_traits>
 
diff --git a/libstdc++-v3/testsuite/20_util/is_pointer_interconvertible/value.cc b/libstdc++-v3/testsuite/20_util/is_pointer_interconvertible/value.cc
index 471571c..fb4652d 100644
--- a/libstdc++-v3/testsuite/20_util/is_pointer_interconvertible/value.cc
+++ b/libstdc++-v3/testsuite/20_util/is_pointer_interconvertible/value.cc
@@ -1,4 +1,3 @@
-// { dg-options "-std=gnu++20" }
 // { dg-do compile { target c++20 } }
 #include <type_traits>
 
diff --git a/libstdc++-v3/testsuite/20_util/is_pointer_interconvertible/version.cc b/libstdc++-v3/testsuite/20_util/is_pointer_interconvertible/version.cc
index 138c4be..8288223 100644
--- a/libstdc++-v3/testsuite/20_util/is_pointer_interconvertible/version.cc
+++ b/libstdc++-v3/testsuite/20_util/is_pointer_interconvertible/version.cc
@@ -1,4 +1,3 @@
-// { dg-options "-std=gnu++20" }
 // { dg-do compile { target c++20 } }
 
 #include <version>
diff --git a/libstdc++-v3/testsuite/20_util/is_pointer_interconvertible/with_class.cc b/libstdc++-v3/testsuite/20_util/is_pointer_interconvertible/with_class.cc
index 28de9b4..bb20d1b 100644
--- a/libstdc++-v3/testsuite/20_util/is_pointer_interconvertible/with_class.cc
+++ b/libstdc++-v3/testsuite/20_util/is_pointer_interconvertible/with_class.cc
@@ -1,4 +1,3 @@
-// { dg-options "-std=gnu++20" }
 // { dg-do compile { target c++20 } }
 #include <type_traits>
 
diff --git a/libstdc++-v3/testsuite/20_util/is_unbounded_array/requirements/explicit_instantiation.cc b/libstdc++-v3/testsuite/20_util/is_unbounded_array/requirements/explicit_instantiation.cc
index c658495..0594ba4 100644
--- a/libstdc++-v3/testsuite/20_util/is_unbounded_array/requirements/explicit_instantiation.cc
+++ b/libstdc++-v3/testsuite/20_util/is_unbounded_array/requirements/explicit_instantiation.cc
@@ -1,5 +1,4 @@
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 // Copyright (C) 2019-2023 Free Software Foundation, Inc.
 //
diff --git a/libstdc++-v3/testsuite/20_util/is_unbounded_array/requirements/typedefs.cc b/libstdc++-v3/testsuite/20_util/is_unbounded_array/requirements/typedefs.cc
index fe28761..6d77e3d 100644
--- a/libstdc++-v3/testsuite/20_util/is_unbounded_array/requirements/typedefs.cc
+++ b/libstdc++-v3/testsuite/20_util/is_unbounded_array/requirements/typedefs.cc
@@ -1,5 +1,4 @@
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 // Copyright (C) 2019-2023 Free Software Foundation, Inc.
 //
diff --git a/libstdc++-v3/testsuite/20_util/is_unbounded_array/value.cc b/libstdc++-v3/testsuite/20_util/is_unbounded_array/value.cc
index 9369fa9..495e1e9 100644
--- a/libstdc++-v3/testsuite/20_util/is_unbounded_array/value.cc
+++ b/libstdc++-v3/testsuite/20_util/is_unbounded_array/value.cc
@@ -1,5 +1,4 @@
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 // Copyright (C) 2019-2023 Free Software Foundation, Inc.
 //
diff --git a/libstdc++-v3/testsuite/20_util/optional/assignment/92878_92947.cc b/libstdc++-v3/testsuite/20_util/optional/assignment/92878_92947.cc
index a0c650d..b673cb3 100644
--- a/libstdc++-v3/testsuite/20_util/optional/assignment/92878_92947.cc
+++ b/libstdc++-v3/testsuite/20_util/optional/assignment/92878_92947.cc
@@ -1,5 +1,4 @@
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 
 // Copyright (C) 2020-2023 Free Software Foundation, Inc.
 //
diff --git a/libstdc++-v3/testsuite/20_util/optional/cons/92878_92947.cc b/libstdc++-v3/testsuite/20_util/optional/cons/92878_92947.cc
index 0345a1a..2aa0fe5 100644
--- a/libstdc++-v3/testsuite/20_util/optional/cons/92878_92947.cc
+++ b/libstdc++-v3/testsuite/20_util/optional/cons/92878_92947.cc
@@ -1,5 +1,4 @@
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 
 // Copyright (C) 2020-2023 Free Software Foundation, Inc.
 //
diff --git a/libstdc++-v3/testsuite/20_util/optional/constexpr/assign.cc b/libstdc++-v3/testsuite/20_util/optional/constexpr/assign.cc
index fb82233..f9086f7 100644
--- a/libstdc++-v3/testsuite/20_util/optional/constexpr/assign.cc
+++ b/libstdc++-v3/testsuite/20_util/optional/constexpr/assign.cc
@@ -1,4 +1,3 @@
-// { dg-options "-std=gnu++20" }
 // { dg-do compile { target c++20 } }
 
 #include <optional>
diff --git a/libstdc++-v3/testsuite/20_util/optional/constexpr/cons/conv.cc b/libstdc++-v3/testsuite/20_util/optional/constexpr/cons/conv.cc
index cc63814..3c1d357 100644
--- a/libstdc++-v3/testsuite/20_util/optional/constexpr/cons/conv.cc
+++ b/libstdc++-v3/testsuite/20_util/optional/constexpr/cons/conv.cc
@@ -1,4 +1,3 @@
-// { dg-options "-std=gnu++20" }
 // { dg-do compile { target c++20 } }
 
 #include <optional>
diff --git a/libstdc++-v3/testsuite/20_util/optional/constexpr/modifiers.cc b/libstdc++-v3/testsuite/20_util/optional/constexpr/modifiers.cc
index 614607d..eea0df2 100644
--- a/libstdc++-v3/testsuite/20_util/optional/constexpr/modifiers.cc
+++ b/libstdc++-v3/testsuite/20_util/optional/constexpr/modifiers.cc
@@ -1,4 +1,3 @@
-// { dg-options "-std=gnu++20" }
 // { dg-do compile { target c++20 } }
 
 #include <optional>
diff --git a/libstdc++-v3/testsuite/20_util/optional/constexpr/swap.cc b/libstdc++-v3/testsuite/20_util/optional/constexpr/swap.cc
index 2d18a51..57f5cd2 100644
--- a/libstdc++-v3/testsuite/20_util/optional/constexpr/swap.cc
+++ b/libstdc++-v3/testsuite/20_util/optional/constexpr/swap.cc
@@ -1,4 +1,3 @@
-// { dg-options "-std=gnu++20" }
 // { dg-do compile { target c++20 } }
 
 #include <optional>
diff --git a/libstdc++-v3/testsuite/20_util/optional/relops/96269.cc b/libstdc++-v3/testsuite/20_util/optional/relops/96269.cc
index f0a8f2f..ddb4be3 100644
--- a/libstdc++-v3/testsuite/20_util/optional/relops/96269.cc
+++ b/libstdc++-v3/testsuite/20_util/optional/relops/96269.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <optional>
 
diff --git a/libstdc++-v3/testsuite/20_util/optional/relops/three_way.cc b/libstdc++-v3/testsuite/20_util/optional/relops/three_way.cc
index 8ee624d..6fd7024 100644
--- a/libstdc++-v3/testsuite/20_util/optional/relops/three_way.cc
+++ b/libstdc++-v3/testsuite/20_util/optional/relops/three_way.cc
@@ -15,7 +15,6 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++20" }
 // { dg-do compile { target c++20 } }
 
 #include <optional>
diff --git a/libstdc++-v3/testsuite/20_util/pair/comparison_operators/constexpr_c++20.cc b/libstdc++-v3/testsuite/20_util/pair/comparison_operators/constexpr_c++20.cc
index 2c6e20a..12feaca 100644
--- a/libstdc++-v3/testsuite/20_util/pair/comparison_operators/constexpr_c++20.cc
+++ b/libstdc++-v3/testsuite/20_util/pair/comparison_operators/constexpr_c++20.cc
@@ -1,5 +1,4 @@
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 // Copyright (C) 2019-2023 Free Software Foundation, Inc.
 //
diff --git a/libstdc++-v3/testsuite/20_util/pair/cons/92878_92947.cc b/libstdc++-v3/testsuite/20_util/pair/cons/92878_92947.cc
index c423ac2..706ce1a 100644
--- a/libstdc++-v3/testsuite/20_util/pair/cons/92878_92947.cc
+++ b/libstdc++-v3/testsuite/20_util/pair/cons/92878_92947.cc
@@ -1,5 +1,4 @@
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 
 // Copyright (C) 2020-2023 Free Software Foundation, Inc.
 //
diff --git a/libstdc++-v3/testsuite/20_util/pair/constexpr_assign.cc b/libstdc++-v3/testsuite/20_util/pair/constexpr_assign.cc
index 923c019..9509180 100644
--- a/libstdc++-v3/testsuite/20_util/pair/constexpr_assign.cc
+++ b/libstdc++-v3/testsuite/20_util/pair/constexpr_assign.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <utility>
 #include <tuple>
diff --git a/libstdc++-v3/testsuite/20_util/pair/constexpr_swap.cc b/libstdc++-v3/testsuite/20_util/pair/constexpr_swap.cc
index 5ef264e..5f2242c 100644
--- a/libstdc++-v3/testsuite/20_util/pair/constexpr_swap.cc
+++ b/libstdc++-v3/testsuite/20_util/pair/constexpr_swap.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <utility>
 #include <tuple>
diff --git a/libstdc++-v3/testsuite/20_util/pair/requirements/structural.cc b/libstdc++-v3/testsuite/20_util/pair/requirements/structural.cc
index d4df201..75ae4f6 100644
--- a/libstdc++-v3/testsuite/20_util/pair/requirements/structural.cc
+++ b/libstdc++-v3/testsuite/20_util/pair/requirements/structural.cc
@@ -1,4 +1,3 @@
-// { dg-options "-std=gnu++20" }
 // { dg-do compile { target c++20 } }
 
 #include <utility>
diff --git a/libstdc++-v3/testsuite/20_util/pointer_traits/pointer_to_constexpr.cc b/libstdc++-v3/testsuite/20_util/pointer_traits/pointer_to_constexpr.cc
index 197de12..f5c9076 100644
--- a/libstdc++-v3/testsuite/20_util/pointer_traits/pointer_to_constexpr.cc
+++ b/libstdc++-v3/testsuite/20_util/pointer_traits/pointer_to_constexpr.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <memory>
 
diff --git a/libstdc++-v3/testsuite/20_util/polymorphic_allocator/allocate_object.cc b/libstdc++-v3/testsuite/20_util/polymorphic_allocator/allocate_object.cc
index c395b8c..54f1004 100644
--- a/libstdc++-v3/testsuite/20_util/polymorphic_allocator/allocate_object.cc
+++ b/libstdc++-v3/testsuite/20_util/polymorphic_allocator/allocate_object.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 
 #include <memory_resource>
 #include <cstring>
diff --git a/libstdc++-v3/testsuite/20_util/polymorphic_allocator/construct_c++2a.cc b/libstdc++-v3/testsuite/20_util/polymorphic_allocator/construct_c++2a.cc
index bf8d468..5b5accc 100644
--- a/libstdc++-v3/testsuite/20_util/polymorphic_allocator/construct_c++2a.cc
+++ b/libstdc++-v3/testsuite/20_util/polymorphic_allocator/construct_c++2a.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 
 #include <memory_resource>
 #include <utility>
diff --git a/libstdc++-v3/testsuite/20_util/polymorphic_allocator/lwg3237.cc b/libstdc++-v3/testsuite/20_util/polymorphic_allocator/lwg3237.cc
index aa399b5..3239d5a 100644
--- a/libstdc++-v3/testsuite/20_util/polymorphic_allocator/lwg3237.cc
+++ b/libstdc++-v3/testsuite/20_util/polymorphic_allocator/lwg3237.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 
 #include <memory_resource>
 #include <testsuite_hooks.h>
diff --git a/libstdc++-v3/testsuite/20_util/reference_wrapper/constexpr.cc b/libstdc++-v3/testsuite/20_util/reference_wrapper/constexpr.cc
index 271e9e4..2d97635 100644
--- a/libstdc++-v3/testsuite/20_util/reference_wrapper/constexpr.cc
+++ b/libstdc++-v3/testsuite/20_util/reference_wrapper/constexpr.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <functional>
 
diff --git a/libstdc++-v3/testsuite/20_util/reference_wrapper/incomplete.cc b/libstdc++-v3/testsuite/20_util/reference_wrapper/incomplete.cc
index d00e2c3..4e82d3e 100644
--- a/libstdc++-v3/testsuite/20_util/reference_wrapper/incomplete.cc
+++ b/libstdc++-v3/testsuite/20_util/reference_wrapper/incomplete.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 // P0357R3 reference_wrapper for incomplete types
 
diff --git a/libstdc++-v3/testsuite/20_util/remove_cvref/requirements/alias_decl.cc b/libstdc++-v3/testsuite/20_util/remove_cvref/requirements/alias_decl.cc
index 4a2613c..6b64f29 100644
--- a/libstdc++-v3/testsuite/20_util/remove_cvref/requirements/alias_decl.cc
+++ b/libstdc++-v3/testsuite/20_util/remove_cvref/requirements/alias_decl.cc
@@ -1,5 +1,4 @@
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 // Copyright (C) 2018-2023 Free Software Foundation, Inc.
 //
diff --git a/libstdc++-v3/testsuite/20_util/remove_cvref/requirements/explicit_instantiation.cc b/libstdc++-v3/testsuite/20_util/remove_cvref/requirements/explicit_instantiation.cc
index 02c40ee..58fb0dd 100644
--- a/libstdc++-v3/testsuite/20_util/remove_cvref/requirements/explicit_instantiation.cc
+++ b/libstdc++-v3/testsuite/20_util/remove_cvref/requirements/explicit_instantiation.cc
@@ -1,5 +1,4 @@
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 // Copyright (C) 2018-2023 Free Software Foundation, Inc.
 //
diff --git a/libstdc++-v3/testsuite/20_util/remove_cvref/value.cc b/libstdc++-v3/testsuite/20_util/remove_cvref/value.cc
index b739fae..341492f 100644
--- a/libstdc++-v3/testsuite/20_util/remove_cvref/value.cc
+++ b/libstdc++-v3/testsuite/20_util/remove_cvref/value.cc
@@ -1,5 +1,4 @@
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 // Copyright (C) 2018-2023 Free Software Foundation, Inc.
 //
diff --git a/libstdc++-v3/testsuite/20_util/scoped_allocator/construct_pair_c++2a.cc b/libstdc++-v3/testsuite/20_util/scoped_allocator/construct_pair_c++2a.cc
index 2e32a9a..88b318f 100644
--- a/libstdc++-v3/testsuite/20_util/scoped_allocator/construct_pair_c++2a.cc
+++ b/libstdc++-v3/testsuite/20_util/scoped_allocator/construct_pair_c++2a.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 
 // P0591R4 makes uses-allocator construction apply recursively for nested pairs
 
diff --git a/libstdc++-v3/testsuite/20_util/shared_ptr/atomic/atomic_shared_ptr.cc b/libstdc++-v3/testsuite/20_util/shared_ptr/atomic/atomic_shared_ptr.cc
index 54cf262..6f790ac 100644
--- a/libstdc++-v3/testsuite/20_util/shared_ptr/atomic/atomic_shared_ptr.cc
+++ b/libstdc++-v3/testsuite/20_util/shared_ptr/atomic/atomic_shared_ptr.cc
@@ -1,4 +1,3 @@
-// { dg-options "-std=gnu++20" }
 // { dg-do run { target c++20 } }
 // { dg-require-effective-target gthreads }
 // { dg-additional-options "-pthread" { target pthread } }
diff --git a/libstdc++-v3/testsuite/20_util/shared_ptr/casts/rval.cc b/libstdc++-v3/testsuite/20_util/shared_ptr/casts/rval.cc
index 9b4ab32..96e9801 100644
--- a/libstdc++-v3/testsuite/20_util/shared_ptr/casts/rval.cc
+++ b/libstdc++-v3/testsuite/20_util/shared_ptr/casts/rval.cc
@@ -1,5 +1,4 @@
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 // { dg-require-effective-target hosted }
 
 // Copyright (C) 2019-2023 Free Software Foundation, Inc.
diff --git a/libstdc++-v3/testsuite/20_util/shared_ptr/comparison/cmp_c++20.cc b/libstdc++-v3/testsuite/20_util/shared_ptr/comparison/cmp_c++20.cc
index b5649e0..6fe6de9 100644
--- a/libstdc++-v3/testsuite/20_util/shared_ptr/comparison/cmp_c++20.cc
+++ b/libstdc++-v3/testsuite/20_util/shared_ptr/comparison/cmp_c++20.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 // { dg-require-effective-target hosted }
 
 #include <memory>
diff --git a/libstdc++-v3/testsuite/20_util/shared_ptr/cons/alias-rval.cc b/libstdc++-v3/testsuite/20_util/shared_ptr/cons/alias-rval.cc
index a955d06..0cc7bb4 100644
--- a/libstdc++-v3/testsuite/20_util/shared_ptr/cons/alias-rval.cc
+++ b/libstdc++-v3/testsuite/20_util/shared_ptr/cons/alias-rval.cc
@@ -1,5 +1,4 @@
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 // { dg-require-effective-target hosted }
 
 // Copyright (C) 2019-2023 Free Software Foundation, Inc.
diff --git a/libstdc++-v3/testsuite/20_util/shared_ptr/creation/92878_92947.cc b/libstdc++-v3/testsuite/20_util/shared_ptr/creation/92878_92947.cc
index 920ffbf..b5fd81e 100644
--- a/libstdc++-v3/testsuite/20_util/shared_ptr/creation/92878_92947.cc
+++ b/libstdc++-v3/testsuite/20_util/shared_ptr/creation/92878_92947.cc
@@ -1,5 +1,4 @@
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 // { dg-require-effective-target hosted }
 
 // Copyright (C) 2020-2023 Free Software Foundation, Inc.
diff --git a/libstdc++-v3/testsuite/20_util/shared_ptr/creation/array.cc b/libstdc++-v3/testsuite/20_util/shared_ptr/creation/array.cc
index 5c11a8b..5340362 100644
--- a/libstdc++-v3/testsuite/20_util/shared_ptr/creation/array.cc
+++ b/libstdc++-v3/testsuite/20_util/shared_ptr/creation/array.cc
@@ -1,4 +1,3 @@
-// { dg-options "-std=gnu++20" }
 // { dg-do run { target c++20 } }
 
 // C++20 20.11.3.7 shared_ptr Creation [util.smartptr.shared.create]
diff --git a/libstdc++-v3/testsuite/20_util/shared_ptr/creation/overwrite.cc b/libstdc++-v3/testsuite/20_util/shared_ptr/creation/overwrite.cc
index 923e909..d78ee69 100644
--- a/libstdc++-v3/testsuite/20_util/shared_ptr/creation/overwrite.cc
+++ b/libstdc++-v3/testsuite/20_util/shared_ptr/creation/overwrite.cc
@@ -1,4 +1,4 @@
-// { dg-options "-std=gnu++20 -fno-lifetime-dse -O0" }
+// { dg-options "-fno-lifetime-dse -O0" }
 // { dg-do run { target c++20 } }
 // { dg-require-effective-target hosted }
 
diff --git a/libstdc++-v3/testsuite/20_util/shared_ptr/creation/version.cc b/libstdc++-v3/testsuite/20_util/shared_ptr/creation/version.cc
index 4dd1b49..9c0fc5d 100644
--- a/libstdc++-v3/testsuite/20_util/shared_ptr/creation/version.cc
+++ b/libstdc++-v3/testsuite/20_util/shared_ptr/creation/version.cc
@@ -1,4 +1,3 @@
-// { dg-options "-std=gnu++20" }
 // { dg-do preprocess { target c++20 } }
 // { dg-require-effective-target hosted }
 
diff --git a/libstdc++-v3/testsuite/20_util/time_point/4.cc b/libstdc++-v3/testsuite/20_util/time_point/4.cc
index f6c3ec9..f4727ae 100644
--- a/libstdc++-v3/testsuite/20_util/time_point/4.cc
+++ b/libstdc++-v3/testsuite/20_util/time_point/4.cc
@@ -1,5 +1,4 @@
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 // Copyright (C) 2020-2023 Free Software Foundation, Inc.
 //
diff --git a/libstdc++-v3/testsuite/20_util/time_point/comparison_operators/three_way.cc b/libstdc++-v3/testsuite/20_util/time_point/comparison_operators/three_way.cc
index 2382d7d..182fdcd 100644
--- a/libstdc++-v3/testsuite/20_util/time_point/comparison_operators/three_way.cc
+++ b/libstdc++-v3/testsuite/20_util/time_point/comparison_operators/three_way.cc
@@ -1,5 +1,4 @@
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 
 // Copyright (C) 2020-2023 Free Software Foundation, Inc.
 //
diff --git a/libstdc++-v3/testsuite/20_util/to_address/1.cc b/libstdc++-v3/testsuite/20_util/to_address/1.cc
index 6ad5630..2e1ec4b 100644
--- a/libstdc++-v3/testsuite/20_util/to_address/1.cc
+++ b/libstdc++-v3/testsuite/20_util/to_address/1.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 
 #include <memory>
 #include <testsuite_hooks.h>
diff --git a/libstdc++-v3/testsuite/20_util/to_address/1_neg.cc b/libstdc++-v3/testsuite/20_util/to_address/1_neg.cc
index 181f8b6..21cd516 100644
--- a/libstdc++-v3/testsuite/20_util/to_address/1_neg.cc
+++ b/libstdc++-v3/testsuite/20_util/to_address/1_neg.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 // { dg-error "not a function pointer" "" { target *-*-* } 0 }
 
 #include <memory>
diff --git a/libstdc++-v3/testsuite/20_util/to_address/debug.cc b/libstdc++-v3/testsuite/20_util/to_address/debug.cc
index d6eba8b..394b9b3 100644
--- a/libstdc++-v3/testsuite/20_util/to_address/debug.cc
+++ b/libstdc++-v3/testsuite/20_util/to_address/debug.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 
 #include <debug/vector>
 #include <testsuite_hooks.h>
diff --git a/libstdc++-v3/testsuite/20_util/to_address/lwg3545.cc b/libstdc++-v3/testsuite/20_util/to_address/lwg3545.cc
index a80ac29..3a1ee8d 100644
--- a/libstdc++-v3/testsuite/20_util/to_address/lwg3545.cc
+++ b/libstdc++-v3/testsuite/20_util/to_address/lwg3545.cc
@@ -1,4 +1,3 @@
-// { dg-options "-std=gnu++20" }
 // { dg-do compile { target c++20 } }
 
 #include <memory>
diff --git a/libstdc++-v3/testsuite/20_util/to_chars/compare.cc b/libstdc++-v3/testsuite/20_util/to_chars/compare.cc
index 250058c..b2faac0 100644
--- a/libstdc++-v3/testsuite/20_util/to_chars/compare.cc
+++ b/libstdc++-v3/testsuite/20_util/to_chars/compare.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 
 #include <charconv>
 #include <testsuite_hooks.h>
diff --git a/libstdc++-v3/testsuite/20_util/tuple/comparison_operators/three_way.cc b/libstdc++-v3/testsuite/20_util/tuple/comparison_operators/three_way.cc
index 82e38a6..e441fe0 100644
--- a/libstdc++-v3/testsuite/20_util/tuple/comparison_operators/three_way.cc
+++ b/libstdc++-v3/testsuite/20_util/tuple/comparison_operators/three_way.cc
@@ -1,5 +1,4 @@
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 
 // Copyright (C) 2020-2023 Free Software Foundation, Inc.
 //
diff --git a/libstdc++-v3/testsuite/20_util/tuple/cons/102270.cc b/libstdc++-v3/testsuite/20_util/tuple/cons/102270.cc
index 5500cac..6ddb963 100644
--- a/libstdc++-v3/testsuite/20_util/tuple/cons/102270.cc
+++ b/libstdc++-v3/testsuite/20_util/tuple/cons/102270.cc
@@ -1,4 +1,3 @@
-// { dg-options "-std=gnu++20" }
 // { dg-do compile { target c++20 } }
 
 #include <tuple>
diff --git a/libstdc++-v3/testsuite/20_util/tuple/cons/constexpr_allocator_arg_t.cc b/libstdc++-v3/testsuite/20_util/tuple/cons/constexpr_allocator_arg_t.cc
index 2ff4310..8f672c9 100644
--- a/libstdc++-v3/testsuite/20_util/tuple/cons/constexpr_allocator_arg_t.cc
+++ b/libstdc++-v3/testsuite/20_util/tuple/cons/constexpr_allocator_arg_t.cc
@@ -1,5 +1,4 @@
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 // FIXME [!HOSTED]: avoidable std::allocator usage
 // { dg-require-effective-target hosted }
 //
diff --git a/libstdc++-v3/testsuite/20_util/tuple/constexpr_swap.cc b/libstdc++-v3/testsuite/20_util/tuple/constexpr_swap.cc
index 14fdec4..1dea311 100644
--- a/libstdc++-v3/testsuite/20_util/tuple/constexpr_swap.cc
+++ b/libstdc++-v3/testsuite/20_util/tuple/constexpr_swap.cc
@@ -1,5 +1,4 @@
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 //
 // Copyright (C) 2019-2023 Free Software Foundation, Inc.
 //
diff --git a/libstdc++-v3/testsuite/20_util/type_identity/requirements/alias_decl.cc b/libstdc++-v3/testsuite/20_util/type_identity/requirements/alias_decl.cc
index 4823a32..67e7f6a 100644
--- a/libstdc++-v3/testsuite/20_util/type_identity/requirements/alias_decl.cc
+++ b/libstdc++-v3/testsuite/20_util/type_identity/requirements/alias_decl.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 //
 #include <type_traits>
 
diff --git a/libstdc++-v3/testsuite/20_util/type_identity/requirements/explicit_instantiation.cc b/libstdc++-v3/testsuite/20_util/type_identity/requirements/explicit_instantiation.cc
index 193ecfe..69c3a7c 100644
--- a/libstdc++-v3/testsuite/20_util/type_identity/requirements/explicit_instantiation.cc
+++ b/libstdc++-v3/testsuite/20_util/type_identity/requirements/explicit_instantiation.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 // NB: This file is for testing type_traits with NO OTHER INCLUDES.
 
diff --git a/libstdc++-v3/testsuite/20_util/type_identity/requirements/typedefs.cc b/libstdc++-v3/testsuite/20_util/type_identity/requirements/typedefs.cc
index c7248a2..6c9ba22 100644
--- a/libstdc++-v3/testsuite/20_util/type_identity/requirements/typedefs.cc
+++ b/libstdc++-v3/testsuite/20_util/type_identity/requirements/typedefs.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <type_traits>
 
diff --git a/libstdc++-v3/testsuite/20_util/typeindex/comparison_operators_c++20.cc b/libstdc++-v3/testsuite/20_util/typeindex/comparison_operators_c++20.cc
index b903b72..98be53f 100644
--- a/libstdc++-v3/testsuite/20_util/typeindex/comparison_operators_c++20.cc
+++ b/libstdc++-v3/testsuite/20_util/typeindex/comparison_operators_c++20.cc
@@ -1,5 +1,4 @@
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 // { dg-require-effective-target rtti }
 
 // Copyright (C) 2020-2023 Free Software Foundation, Inc.
diff --git a/libstdc++-v3/testsuite/20_util/unique_ptr/comparison/compare_c++20.cc b/libstdc++-v3/testsuite/20_util/unique_ptr/comparison/compare_c++20.cc
index 43eb2d9..e0d9504 100644
--- a/libstdc++-v3/testsuite/20_util/unique_ptr/comparison/compare_c++20.cc
+++ b/libstdc++-v3/testsuite/20_util/unique_ptr/comparison/compare_c++20.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 
 #include <memory>
 #include <testsuite_hooks.h>
diff --git a/libstdc++-v3/testsuite/20_util/unique_ptr/creation/92878_92947.cc b/libstdc++-v3/testsuite/20_util/unique_ptr/creation/92878_92947.cc
index aef5555..0f656de 100644
--- a/libstdc++-v3/testsuite/20_util/unique_ptr/creation/92878_92947.cc
+++ b/libstdc++-v3/testsuite/20_util/unique_ptr/creation/92878_92947.cc
@@ -1,5 +1,4 @@
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 // { dg-require-effective-target hosted }
 
 // Copyright (C) 2020-2023 Free Software Foundation, Inc.
diff --git a/libstdc++-v3/testsuite/20_util/unique_ptr/creation/for_overwrite.cc b/libstdc++-v3/testsuite/20_util/unique_ptr/creation/for_overwrite.cc
index 86b9045..37ef1b73 100644
--- a/libstdc++-v3/testsuite/20_util/unique_ptr/creation/for_overwrite.cc
+++ b/libstdc++-v3/testsuite/20_util/unique_ptr/creation/for_overwrite.cc
@@ -1,5 +1,5 @@
-// { dg-options "-std=gnu++20 -fno-lifetime-dse -O0" }
-// { dg-do run { target c++2a } }
+// { dg-options "-fno-lifetime-dse -O0" }
+// { dg-do run { target c++20 } }
 // { dg-xfail-run-if "AIX operator new" { powerpc-ibm-aix* } }
 // { dg-require-effective-target hosted }
 
diff --git a/libstdc++-v3/testsuite/20_util/unique_ptr/creation/for_overwrite__neg.cc b/libstdc++-v3/testsuite/20_util/unique_ptr/creation/for_overwrite__neg.cc
index d1144ef..7afbc5a 100644
--- a/libstdc++-v3/testsuite/20_util/unique_ptr/creation/for_overwrite__neg.cc
+++ b/libstdc++-v3/testsuite/20_util/unique_ptr/creation/for_overwrite__neg.cc
@@ -1,5 +1,4 @@
-// { dg-options "-std=gnu++20" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 // { dg-require-effective-target hosted }
 
 // Copyright (C) 2020-2023 Free Software Foundation, Inc.
diff --git a/libstdc++-v3/testsuite/20_util/unique_ptr/io/lwg2948.cc b/libstdc++-v3/testsuite/20_util/unique_ptr/io/lwg2948.cc
index 45c54a0..7266fd3 100644
--- a/libstdc++-v3/testsuite/20_util/unique_ptr/io/lwg2948.cc
+++ b/libstdc++-v3/testsuite/20_util/unique_ptr/io/lwg2948.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 
 #include <memory>
 #include <sstream>
diff --git a/libstdc++-v3/testsuite/20_util/unwrap_reference/1.cc b/libstdc++-v3/testsuite/20_util/unwrap_reference/1.cc
index 15a9e39..d3a33f8 100644
--- a/libstdc++-v3/testsuite/20_util/unwrap_reference/1.cc
+++ b/libstdc++-v3/testsuite/20_util/unwrap_reference/1.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <type_traits>
 
diff --git a/libstdc++-v3/testsuite/20_util/unwrap_reference/2.cc b/libstdc++-v3/testsuite/20_util/unwrap_reference/2.cc
index ab67269..95e6144 100644
--- a/libstdc++-v3/testsuite/20_util/unwrap_reference/2.cc
+++ b/libstdc++-v3/testsuite/20_util/unwrap_reference/2.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <type_traits>
 
diff --git a/libstdc++-v3/testsuite/20_util/unwrap_reference/3.cc b/libstdc++-v3/testsuite/20_util/unwrap_reference/3.cc
index 9ea4387..e2e91fd 100644
--- a/libstdc++-v3/testsuite/20_util/unwrap_reference/3.cc
+++ b/libstdc++-v3/testsuite/20_util/unwrap_reference/3.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <version>
 
diff --git a/libstdc++-v3/testsuite/20_util/uses_allocator/92878_92947.cc b/libstdc++-v3/testsuite/20_util/uses_allocator/92878_92947.cc
index 9c4d296..ca3efd7 100644
--- a/libstdc++-v3/testsuite/20_util/uses_allocator/92878_92947.cc
+++ b/libstdc++-v3/testsuite/20_util/uses_allocator/92878_92947.cc
@@ -1,5 +1,4 @@
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 // { dg-require-effective-target hosted }
 
 // Copyright (C) 2020-2023 Free Software Foundation, Inc.
diff --git a/libstdc++-v3/testsuite/20_util/uses_allocator/lwg3527.cc b/libstdc++-v3/testsuite/20_util/uses_allocator/lwg3527.cc
index c5a7d51..445e409 100644
--- a/libstdc++-v3/testsuite/20_util/uses_allocator/lwg3527.cc
+++ b/libstdc++-v3/testsuite/20_util/uses_allocator/lwg3527.cc
@@ -1,4 +1,3 @@
-// { dg-options "-std=gnu++20" }
 // { dg-do compile { target c++20 } }
 // { dg-require-effective-target hosted }
 
diff --git a/libstdc++-v3/testsuite/20_util/uses_allocator/make_obj.cc b/libstdc++-v3/testsuite/20_util/uses_allocator/make_obj.cc
index 23336a8..d1a9fb5 100644
--- a/libstdc++-v3/testsuite/20_util/uses_allocator/make_obj.cc
+++ b/libstdc++-v3/testsuite/20_util/uses_allocator/make_obj.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 
 #include <testsuite_hooks.h>
 #include <testsuite_allocator.h>
diff --git a/libstdc++-v3/testsuite/20_util/uses_allocator/uninitialized_construct.cc b/libstdc++-v3/testsuite/20_util/uses_allocator/uninitialized_construct.cc
index 06e850f..8fbc767 100644
--- a/libstdc++-v3/testsuite/20_util/uses_allocator/uninitialized_construct.cc
+++ b/libstdc++-v3/testsuite/20_util/uses_allocator/uninitialized_construct.cc
@@ -1,4 +1,3 @@
-// { dg-options "-std=gnu++20" }
 // { dg-do compile { target c++20 } }
 // TODO [!HOSTED]: avoidable std::allocator usage
 // { dg-require-effective-target hosted }
diff --git a/libstdc++-v3/testsuite/20_util/variant/92878_92947.cc b/libstdc++-v3/testsuite/20_util/variant/92878_92947.cc
index 7c3d5bf..528c59d 100644
--- a/libstdc++-v3/testsuite/20_util/variant/92878_92947.cc
+++ b/libstdc++-v3/testsuite/20_util/variant/92878_92947.cc
@@ -1,5 +1,4 @@
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 
 // Copyright (C) 2020-2023 Free Software Foundation, Inc.
 //
diff --git a/libstdc++-v3/testsuite/20_util/variant/95915.cc b/libstdc++-v3/testsuite/20_util/variant/95915.cc
index 84e9158..471d9a4 100644
--- a/libstdc++-v3/testsuite/20_util/variant/95915.cc
+++ b/libstdc++-v3/testsuite/20_util/variant/95915.cc
@@ -1,4 +1,3 @@
-// { dg-options "-std=gnu++20" }
 // { dg-do compile { target c++20 } }
 
 // Copyright (C) 2020-2023 Free Software Foundation, Inc.
diff --git a/libstdc++-v3/testsuite/20_util/variant/constexpr.cc b/libstdc++-v3/testsuite/20_util/variant/constexpr.cc
index 7af3d98..55fac02 100644
--- a/libstdc++-v3/testsuite/20_util/variant/constexpr.cc
+++ b/libstdc++-v3/testsuite/20_util/variant/constexpr.cc
@@ -1,4 +1,3 @@
-// { dg-options "-std=gnu++20" }
 // { dg-do compile { target c++20 } }
 
 #include <variant>
diff --git a/libstdc++-v3/testsuite/20_util/variant/relops/three_way.cc b/libstdc++-v3/testsuite/20_util/variant/relops/three_way.cc
index dc3f545..91f59ff 100644
--- a/libstdc++-v3/testsuite/20_util/variant/relops/three_way.cc
+++ b/libstdc++-v3/testsuite/20_util/variant/relops/three_way.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <variant>
 
diff --git a/libstdc++-v3/testsuite/20_util/variant/visit_neg.cc b/libstdc++-v3/testsuite/20_util/variant/visit_neg.cc
index d93c3ba..6e93431 100644
--- a/libstdc++-v3/testsuite/20_util/variant/visit_neg.cc
+++ b/libstdc++-v3/testsuite/20_util/variant/visit_neg.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <variant>
 #include <testsuite_hooks.h>
diff --git a/libstdc++-v3/testsuite/20_util/variant/visit_r.cc b/libstdc++-v3/testsuite/20_util/variant/visit_r.cc
index 1fb18f2..4f551a6 100644
--- a/libstdc++-v3/testsuite/20_util/variant/visit_r.cc
+++ b/libstdc++-v3/testsuite/20_util/variant/visit_r.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 
 #include <variant>
 #include <testsuite_hooks.h>
diff --git a/libstdc++-v3/testsuite/20_util/weak_ptr/atomic_weak_ptr.cc b/libstdc++-v3/testsuite/20_util/weak_ptr/atomic_weak_ptr.cc
index b38cea7..f612bc2 100644
--- a/libstdc++-v3/testsuite/20_util/weak_ptr/atomic_weak_ptr.cc
+++ b/libstdc++-v3/testsuite/20_util/weak_ptr/atomic_weak_ptr.cc
@@ -1,4 +1,3 @@
-// { dg-options "-std=gnu++20" }
 // { dg-do run { target c++20 } }
 // { dg-require-effective-target gthreads }
 // { dg-additional-options "-pthread" { target pthread } }