Index: test/std/re/re.results/re.results.all/get_allocator.pass.cpp
===================================================================
--- test/std/re/re.results/re.results.all/get_allocator.pass.cpp
+++ test/std/re/re.results/re.results.all/get_allocator.pass.cpp
@@ -24,7 +24,7 @@
 {
     std::match_results<const CharT*, Allocator> m(a);
     assert(m.size() == 0);
-    assert(m.str() == std::basic_string<CharT>());
+    assert(!m.ready() || m.str() == std::basic_string<CharT>());
     assert(m.get_allocator() == a);
 }
 
Index: test/std/re/re.results/re.results.const/allocator.pass.cpp
===================================================================
--- test/std/re/re.results/re.results.const/allocator.pass.cpp
+++ test/std/re/re.results/re.results.const/allocator.pass.cpp
@@ -24,7 +24,7 @@
 {
     std::match_results<const CharT*, Allocator> m(a);
     assert(m.size() == 0);
-    assert(m.str() == std::basic_string<CharT>());
+    assert(!m.ready() || m.str() == std::basic_string<CharT>());
     assert(m.get_allocator() == a);
 }
 
Index: test/std/re/re.results/re.results.const/copy.pass.cpp
===================================================================
--- test/std/re/re.results/re.results.const/copy.pass.cpp
+++ test/std/re/re.results/re.results.const/copy.pass.cpp
@@ -25,8 +25,8 @@
     SM m0(a);
     SM m1(m0);
 
-    assert(m1.size()          == m0.size());
-    assert(m1.str()           == m0.str());
+    assert(m1.size() == m0.size());
+    assert(!m1.ready() || !m0.ready() || m1.str() == m0.str());
     assert(m1.get_allocator() == m0.get_allocator());
 }
 
Index: test/std/re/re.results/re.results.const/copy_assign.pass.cpp
===================================================================
--- test/std/re/re.results/re.results.const/copy_assign.pass.cpp
+++ test/std/re/re.results/re.results.const/copy_assign.pass.cpp
@@ -26,8 +26,8 @@
     SM m1;
 
     m1 = m0;
-    assert(m1.size()          == m0.size());
-    assert(m1.str()           == m0.str());
+    assert(m1.size() == m0.size());
+    assert(!m1.ready() || !m0.ready() || m1.str() == m0.str());
     if (std::allocator_traits<Allocator>::propagate_on_container_copy_assignment::value)
         assert(m1.get_allocator() == m0.get_allocator());
     else
Index: test/std/re/re.results/re.results.const/default.pass.cpp
===================================================================
--- test/std/re/re.results/re.results.const/default.pass.cpp
+++ test/std/re/re.results/re.results.const/default.pass.cpp
@@ -22,7 +22,7 @@
 {
     std::match_results<const CharT*> m;
     assert(m.size() == 0);
-    assert(m.str() == std::basic_string<CharT>());
+    assert(!m.ready() || m.str() == std::basic_string<CharT>());
     assert(m.get_allocator() == std::allocator<std::sub_match<const CharT*> >());
 }
 
Index: test/std/re/re.results/re.results.const/move.pass.cpp
===================================================================
--- test/std/re/re.results/re.results.const/move.pass.cpp
+++ test/std/re/re.results/re.results.const/move.pass.cpp
@@ -31,7 +31,7 @@
 
     SM m1(std::move(m0));
     assert(m1.size() == 0);
-    assert(m1.str() == std::basic_string<CharT>());
+    assert(!m1.ready() || m1.str() == std::basic_string<CharT>());
     assert(m1.get_allocator() == a);
 }
 
Index: test/std/re/re.results/re.results.const/move_assign.pass.cpp
===================================================================
--- test/std/re/re.results/re.results.const/move_assign.pass.cpp
+++ test/std/re/re.results/re.results.const/move_assign.pass.cpp
@@ -27,8 +27,8 @@
     SM m1;
 
     m1 = std::move(m0);
-    assert(m1.size()          == 0);
-    assert(m1.str()           == std::basic_string<CharT>());
+    assert(m1.size() == 0);
+    assert(!m1.ready() || m1.str() == std::basic_string<CharT>());
     if (std::allocator_traits<Allocator>::propagate_on_container_move_assignment::value)
         assert(m1.get_allocator() == a);
     else