Index: test/std/containers/associative/map/map.ops/count0.pass.cpp
===================================================================
--- test/std/containers/associative/map/map.ops/count0.pass.cpp
+++ test/std/containers/associative/map/map.ops/count0.pass.cpp
@@ -30,10 +30,10 @@
 {
     {
     typedef std::map<int, double, transparent_less> M;
-    M().count(C2Int{5});
+    assert(M().count(C2Int{5}) == 0);
     }
     {
     typedef std::map<int, double, transparent_less_not_referenceable> M;
-    M().count(C2Int{5});
+    assert(M().count(C2Int{5}) == 0);
     }
 }
Index: test/std/containers/associative/map/map.ops/count1.fail.cpp
===================================================================
--- test/std/containers/associative/map/map.ops/count1.fail.cpp
+++ test/std/containers/associative/map/map.ops/count1.fail.cpp
@@ -34,7 +34,7 @@
     {
     typedef std::map<int, double, transparent_less_no_type> M;
 
-    M().count(C2Int{5});
+    (void)M().count(C2Int{5});
     }
 }
 #endif
Index: test/std/containers/associative/map/map.ops/count2.fail.cpp
===================================================================
--- test/std/containers/associative/map/map.ops/count2.fail.cpp
+++ test/std/containers/associative/map/map.ops/count2.fail.cpp
@@ -34,7 +34,7 @@
     {
     typedef std::map<int, double, transparent_less_private> M;
 
-    M().count(C2Int{5});
+    (void)M().count(C2Int{5});
     }
 }
 #endif
Index: test/std/containers/associative/map/map.ops/count3.fail.cpp
===================================================================
--- test/std/containers/associative/map/map.ops/count3.fail.cpp
+++ test/std/containers/associative/map/map.ops/count3.fail.cpp
@@ -34,7 +34,7 @@
     {
     typedef std::map<int, double, transparent_less_not_a_type> M;
 
-    M().count(C2Int{5});
+    (void)M().count(C2Int{5});
     }
 }
 #endif
Index: test/std/containers/associative/map/map.ops/equal_range0.pass.cpp
===================================================================
--- test/std/containers/associative/map/map.ops/equal_range0.pass.cpp
+++ test/std/containers/associative/map/map.ops/equal_range0.pass.cpp
@@ -30,10 +30,16 @@
 {
     {
     typedef std::map<int, double, transparent_less> M;
-    M().equal_range(C2Int{5});
+    typedef std::pair<typename M::iterator, typename M::iterator> P;
+    M example;
+    P result = example.equal_range(C2Int{5});
+    assert(result.first == result.second);
     }
     {
     typedef std::map<int, double, transparent_less_not_referenceable> M;
-    M().equal_range(C2Int{5});
+    typedef std::pair<typename M::iterator, typename M::iterator> P;
+    M example;
+    P result = example.equal_range(C2Int{5});
+    assert(result.first == result.second);
     }
 }
Index: test/std/containers/associative/map/map.ops/equal_range1.fail.cpp
===================================================================
--- test/std/containers/associative/map/map.ops/equal_range1.fail.cpp
+++ test/std/containers/associative/map/map.ops/equal_range1.fail.cpp
@@ -34,7 +34,7 @@
     {
     typedef std::map<int, double, transparent_less_no_type> M;
 
-    M().equal_range(C2Int{5});
+    (void)M().equal_range(C2Int{5});
     }
 }
 #endif
Index: test/std/containers/associative/map/map.ops/equal_range2.fail.cpp
===================================================================
--- test/std/containers/associative/map/map.ops/equal_range2.fail.cpp
+++ test/std/containers/associative/map/map.ops/equal_range2.fail.cpp
@@ -34,7 +34,7 @@
     {
     typedef std::map<int, double, transparent_less_private> M;
 
-    M().equal_range(C2Int{5});
+    (void)M().equal_range(C2Int{5});
     }
 }
 #endif
Index: test/std/containers/associative/map/map.ops/equal_range3.fail.cpp
===================================================================
--- test/std/containers/associative/map/map.ops/equal_range3.fail.cpp
+++ test/std/containers/associative/map/map.ops/equal_range3.fail.cpp
@@ -34,7 +34,7 @@
     {
     typedef std::map<int, double, transparent_less_not_a_type> M;
 
-    M().equal_range(C2Int{5});
+    (void)M().equal_range(C2Int{5});
     }
 }
 #endif
Index: test/std/containers/associative/map/map.ops/find0.pass.cpp
===================================================================
--- test/std/containers/associative/map/map.ops/find0.pass.cpp
+++ test/std/containers/associative/map/map.ops/find0.pass.cpp
@@ -30,10 +30,12 @@
 {
     {
     typedef std::map<int, double, transparent_less> M;
-    M().find(C2Int{5});
+    M example;
+    assert(example.find(C2Int{5}) == example.end());
     }
     {
     typedef std::map<int, double, transparent_less_not_referenceable> M;
-    M().find(C2Int{5});
+    M example;
+    assert(example.find(C2Int{5}) == example.end());
     }
 }
Index: test/std/containers/associative/map/map.ops/find1.fail.cpp
===================================================================
--- test/std/containers/associative/map/map.ops/find1.fail.cpp
+++ test/std/containers/associative/map/map.ops/find1.fail.cpp
@@ -34,7 +34,7 @@
     {
     typedef std::map<int, double, transparent_less_no_type> M;
 
-    M().find(C2Int{5});
+    (void)M().find(C2Int{5});
     }
 }
 #endif
Index: test/std/containers/associative/map/map.ops/find2.fail.cpp
===================================================================
--- test/std/containers/associative/map/map.ops/find2.fail.cpp
+++ test/std/containers/associative/map/map.ops/find2.fail.cpp
@@ -34,7 +34,7 @@
     {
     typedef std::map<int, double, transparent_less_private> M;
 
-    M().find(C2Int{5});
+    (void)M().find(C2Int{5});
     }
 }
 #endif
Index: test/std/containers/associative/map/map.ops/find3.fail.cpp
===================================================================
--- test/std/containers/associative/map/map.ops/find3.fail.cpp
+++ test/std/containers/associative/map/map.ops/find3.fail.cpp
@@ -34,7 +34,7 @@
     {
     typedef std::map<int, double, transparent_less_not_a_type> M;
 
-    M().find(C2Int{5});
+    (void)M().find(C2Int{5});
     }
 }
 #endif
Index: test/std/containers/associative/map/map.ops/lower_bound0.pass.cpp
===================================================================
--- test/std/containers/associative/map/map.ops/lower_bound0.pass.cpp
+++ test/std/containers/associative/map/map.ops/lower_bound0.pass.cpp
@@ -30,10 +30,12 @@
 {
     {
     typedef std::map<int, double, transparent_less> M;
-    M().lower_bound(C2Int{5});
+    M example;
+    assert(example.lower_bound(C2Int{5}) == example.end());
     }
     {
     typedef std::map<int, double, transparent_less_not_referenceable> M;
-    M().lower_bound(C2Int{5});
+    M example;
+    assert(example.lower_bound(C2Int{5}) == example.end());
     }
 }
Index: test/std/containers/associative/map/map.ops/lower_bound1.fail.cpp
===================================================================
--- test/std/containers/associative/map/map.ops/lower_bound1.fail.cpp
+++ test/std/containers/associative/map/map.ops/lower_bound1.fail.cpp
@@ -34,7 +34,7 @@
     {
     typedef std::map<int, double, transparent_less_no_type> M;
 
-    M().lower_bound(C2Int{5});
+    (void)M().lower_bound(C2Int{5});
     }
 }
 #endif
Index: test/std/containers/associative/map/map.ops/lower_bound2.fail.cpp
===================================================================
--- test/std/containers/associative/map/map.ops/lower_bound2.fail.cpp
+++ test/std/containers/associative/map/map.ops/lower_bound2.fail.cpp
@@ -34,7 +34,7 @@
     {
     typedef std::map<int, double, transparent_less_private> M;
 
-    M().lower_bound(C2Int{5});
+    (void)M().lower_bound(C2Int{5});
     }
 }
 #endif
Index: test/std/containers/associative/map/map.ops/lower_bound3.fail.cpp
===================================================================
--- test/std/containers/associative/map/map.ops/lower_bound3.fail.cpp
+++ test/std/containers/associative/map/map.ops/lower_bound3.fail.cpp
@@ -34,7 +34,7 @@
     {
     typedef std::map<int, double, transparent_less_not_a_type> M;
 
-    M().lower_bound(C2Int{5});
+    (void)M().lower_bound(C2Int{5});
     }
 }
 #endif
Index: test/std/containers/associative/map/map.ops/upper_bound0.pass.cpp
===================================================================
--- test/std/containers/associative/map/map.ops/upper_bound0.pass.cpp
+++ test/std/containers/associative/map/map.ops/upper_bound0.pass.cpp
@@ -30,10 +30,12 @@
 {
     {
     typedef std::map<int, double, transparent_less> M;
-    M().upper_bound(C2Int{5});
+    M example;
+    assert(example.upper_bound(C2Int{5}) == example.end());
     }
     {
     typedef std::map<int, double, transparent_less_not_referenceable> M;
-    M().upper_bound(C2Int{5});
+    M example;
+    assert(example.upper_bound(C2Int{5}) == example.end());
     }
 }
Index: test/std/containers/associative/map/map.ops/upper_bound1.fail.cpp
===================================================================
--- test/std/containers/associative/map/map.ops/upper_bound1.fail.cpp
+++ test/std/containers/associative/map/map.ops/upper_bound1.fail.cpp
@@ -34,7 +34,7 @@
     {
     typedef std::map<int, double, transparent_less_no_type> M;
 
-    M().upper_bound(C2Int{5});
+    (void)M().upper_bound(C2Int{5});
     }
 }
 #endif
Index: test/std/containers/associative/map/map.ops/upper_bound2.fail.cpp
===================================================================
--- test/std/containers/associative/map/map.ops/upper_bound2.fail.cpp
+++ test/std/containers/associative/map/map.ops/upper_bound2.fail.cpp
@@ -34,7 +34,7 @@
     {
     typedef std::map<int, double, transparent_less_private> M;
 
-    M().upper_bound(C2Int{5});
+    (void)M().upper_bound(C2Int{5});
     }
 }
 #endif
Index: test/std/containers/associative/map/map.ops/upper_bound3.fail.cpp
===================================================================
--- test/std/containers/associative/map/map.ops/upper_bound3.fail.cpp
+++ test/std/containers/associative/map/map.ops/upper_bound3.fail.cpp
@@ -34,7 +34,7 @@
     {
     typedef std::map<int, double, transparent_less_not_a_type> M;
 
-    M().upper_bound(C2Int{5});
+    (void)M().upper_bound(C2Int{5});
     }
 }
 #endif
Index: test/std/containers/associative/multimap/multimap.ops/count0.pass.cpp
===================================================================
--- test/std/containers/associative/multimap/multimap.ops/count0.pass.cpp
+++ test/std/containers/associative/multimap/multimap.ops/count0.pass.cpp
@@ -30,10 +30,10 @@
 {
     {
     typedef std::multimap<int, double, transparent_less> M;
-    M().count(C2Int{5});
+    assert(M().count(C2Int{5}) == 0);
     }
     {
     typedef std::multimap<int, double, transparent_less_not_referenceable> M;
-    M().count(C2Int{5});
+    assert(M().count(C2Int{5}) == 0);
     }
 }
Index: test/std/containers/associative/multimap/multimap.ops/count1.fail.cpp
===================================================================
--- test/std/containers/associative/multimap/multimap.ops/count1.fail.cpp
+++ test/std/containers/associative/multimap/multimap.ops/count1.fail.cpp
@@ -33,6 +33,6 @@
 {
     typedef std::multimap<int, double, transparent_less_no_type> M;
 
-    M().count(C2Int{5});
+    (void)M().count(C2Int{5});
 }
 #endif
Index: test/std/containers/associative/multimap/multimap.ops/count2.fail.cpp
===================================================================
--- test/std/containers/associative/multimap/multimap.ops/count2.fail.cpp
+++ test/std/containers/associative/multimap/multimap.ops/count2.fail.cpp
@@ -33,6 +33,6 @@
 {
     typedef std::multimap<int, double, transparent_less_private> M;
 
-    M().count(C2Int{5});
+    (void)M().count(C2Int{5});
 }
 #endif
Index: test/std/containers/associative/multimap/multimap.ops/count3.fail.cpp
===================================================================
--- test/std/containers/associative/multimap/multimap.ops/count3.fail.cpp
+++ test/std/containers/associative/multimap/multimap.ops/count3.fail.cpp
@@ -33,6 +33,6 @@
 {
     typedef std::multimap<int, double, transparent_less_not_a_type> M;
 
-    M().count(C2Int{5});
+    (void)M().count(C2Int{5});
 }
 #endif
Index: test/std/containers/associative/multimap/multimap.ops/equal_range0.pass.cpp
===================================================================
--- test/std/containers/associative/multimap/multimap.ops/equal_range0.pass.cpp
+++ test/std/containers/associative/multimap/multimap.ops/equal_range0.pass.cpp
@@ -30,10 +30,16 @@
 {
     {
     typedef std::multimap<int, double, transparent_less> M;
-    M().equal_range(C2Int{5});
+    typedef std::pair<typename M::iterator, typename M::iterator> P;
+    M example;
+    P result = example.equal_range(C2Int{5});
+    assert(result.first == result.second);
     }
     {
     typedef std::multimap<int, double, transparent_less_not_referenceable> M;
-    M().equal_range(C2Int{5});
+    typedef std::pair<typename M::iterator, typename M::iterator> P;
+    M example;
+    P result = example.equal_range(C2Int{5});
+    assert(result.first == result.second);
     }
 }
Index: test/std/containers/associative/multimap/multimap.ops/equal_range1.fail.cpp
===================================================================
--- test/std/containers/associative/multimap/multimap.ops/equal_range1.fail.cpp
+++ test/std/containers/associative/multimap/multimap.ops/equal_range1.fail.cpp
@@ -33,6 +33,6 @@
 {
     typedef std::multimap<int, double, transparent_less_no_type> M;
 
-    M().equal_range(C2Int{5});
+    (void)M().equal_range(C2Int{5});
 }
 #endif
Index: test/std/containers/associative/multimap/multimap.ops/equal_range2.fail.cpp
===================================================================
--- test/std/containers/associative/multimap/multimap.ops/equal_range2.fail.cpp
+++ test/std/containers/associative/multimap/multimap.ops/equal_range2.fail.cpp
@@ -34,7 +34,7 @@
     {
     typedef std::multimap<int, double, transparent_less_private> M;
 
-    M().equal_range(C2Int{5});
+    (void)M().equal_range(C2Int{5});
     }
 }
 #endif
Index: test/std/containers/associative/multimap/multimap.ops/equal_range3.fail.cpp
===================================================================
--- test/std/containers/associative/multimap/multimap.ops/equal_range3.fail.cpp
+++ test/std/containers/associative/multimap/multimap.ops/equal_range3.fail.cpp
@@ -34,7 +34,7 @@
     {
     typedef std::multimap<int, double, transparent_less_not_a_type> M;
 
-    M().equal_range(C2Int{5});
+    (void)M().equal_range(C2Int{5});
     }
 }
 #endif
Index: test/std/containers/associative/multimap/multimap.ops/find0.pass.cpp
===================================================================
--- test/std/containers/associative/multimap/multimap.ops/find0.pass.cpp
+++ test/std/containers/associative/multimap/multimap.ops/find0.pass.cpp
@@ -30,10 +30,12 @@
 {
     {
     typedef std::multimap<int, double, transparent_less> M;
-    M().find(C2Int{5});
+    M example;
+    assert(example.find(C2Int{5}) == example.end());
     }
     {
     typedef std::multimap<int, double, transparent_less_not_referenceable> M;
-    M().find(C2Int{5});
+    M example;
+    assert(example.find(C2Int{5}) == example.end());
     }
 }
Index: test/std/containers/associative/multimap/multimap.ops/find1.fail.cpp
===================================================================
--- test/std/containers/associative/multimap/multimap.ops/find1.fail.cpp
+++ test/std/containers/associative/multimap/multimap.ops/find1.fail.cpp
@@ -34,7 +34,7 @@
     {
     typedef std::multimap<int, double, transparent_less_no_type> M;
 
-    M().find(C2Int{5});
+    (void)M().find(C2Int{5});
     }
 }
 #endif
Index: test/std/containers/associative/multimap/multimap.ops/find2.fail.cpp
===================================================================
--- test/std/containers/associative/multimap/multimap.ops/find2.fail.cpp
+++ test/std/containers/associative/multimap/multimap.ops/find2.fail.cpp
@@ -34,7 +34,7 @@
     {
     typedef std::multimap<int, double, transparent_less_private> M;
 
-    M().find(C2Int{5});
+    (void)M().find(C2Int{5});
     }
 }
 #endif
Index: test/std/containers/associative/multimap/multimap.ops/find3.fail.cpp
===================================================================
--- test/std/containers/associative/multimap/multimap.ops/find3.fail.cpp
+++ test/std/containers/associative/multimap/multimap.ops/find3.fail.cpp
@@ -34,7 +34,7 @@
     {
     typedef std::multimap<int, double, transparent_less_not_a_type> M;
 
-    M().find(C2Int{5});
+    (void)M().find(C2Int{5});
     }
 }
 #endif
Index: test/std/containers/associative/multimap/multimap.ops/lower_bound0.pass.cpp
===================================================================
--- test/std/containers/associative/multimap/multimap.ops/lower_bound0.pass.cpp
+++ test/std/containers/associative/multimap/multimap.ops/lower_bound0.pass.cpp
@@ -30,10 +30,12 @@
 {
     {
     typedef std::multimap<int, double, transparent_less> M;
-    M().lower_bound(C2Int{5});
+    M example;
+    assert(example.lower_bound(C2Int{5}) == example.end());
     }
     {
     typedef std::multimap<int, double, transparent_less_not_referenceable> M;
-    M().lower_bound(C2Int{5});
+    M example;
+    assert(example.lower_bound(C2Int{5}) == example.end());
     }
 }
Index: test/std/containers/associative/multimap/multimap.ops/lower_bound1.fail.cpp
===================================================================
--- test/std/containers/associative/multimap/multimap.ops/lower_bound1.fail.cpp
+++ test/std/containers/associative/multimap/multimap.ops/lower_bound1.fail.cpp
@@ -34,7 +34,7 @@
     {
     typedef std::multimap<int, double, transparent_less_no_type> M;
 
-    M().lower_bound(C2Int{5});
+    (void)M().lower_bound(C2Int{5});
     }
 }
 #endif
Index: test/std/containers/associative/multimap/multimap.ops/lower_bound2.fail.cpp
===================================================================
--- test/std/containers/associative/multimap/multimap.ops/lower_bound2.fail.cpp
+++ test/std/containers/associative/multimap/multimap.ops/lower_bound2.fail.cpp
@@ -34,7 +34,7 @@
     {
     typedef std::multimap<int, double, transparent_less_private> M;
 
-    M().lower_bound(C2Int{5});
+    (void)M().lower_bound(C2Int{5});
     }
 }
 #endif
Index: test/std/containers/associative/multimap/multimap.ops/lower_bound3.fail.cpp
===================================================================
--- test/std/containers/associative/multimap/multimap.ops/lower_bound3.fail.cpp
+++ test/std/containers/associative/multimap/multimap.ops/lower_bound3.fail.cpp
@@ -34,7 +34,7 @@
     {
     typedef std::multimap<int, double, transparent_less_not_a_type> M;
 
-    M().lower_bound(C2Int{5});
+    (void)M().lower_bound(C2Int{5});
     }
 }
 #endif
Index: test/std/containers/associative/multimap/multimap.ops/upper_bound0.pass.cpp
===================================================================
--- test/std/containers/associative/multimap/multimap.ops/upper_bound0.pass.cpp
+++ test/std/containers/associative/multimap/multimap.ops/upper_bound0.pass.cpp
@@ -30,10 +30,12 @@
 {
     {
     typedef std::multimap<int, double, transparent_less> M;
-    M().upper_bound(C2Int{5});
+    M example;
+    assert(example.upper_bound(C2Int{5}) == example.end());
     }
     {
     typedef std::multimap<int, double, transparent_less_not_referenceable> M;
-    M().upper_bound(C2Int{5});
+    M example;
+    assert(example.upper_bound(C2Int{5}) == example.end());
     }
 }
Index: test/std/containers/associative/multimap/multimap.ops/upper_bound1.fail.cpp
===================================================================
--- test/std/containers/associative/multimap/multimap.ops/upper_bound1.fail.cpp
+++ test/std/containers/associative/multimap/multimap.ops/upper_bound1.fail.cpp
@@ -34,7 +34,7 @@
     {
     typedef std::multimap<int, double, transparent_less_no_type> M;
 
-    M().upper_bound(C2Int{5});
+    (void)M().upper_bound(C2Int{5});
     }
 }
 #endif
Index: test/std/containers/associative/multimap/multimap.ops/upper_bound2.fail.cpp
===================================================================
--- test/std/containers/associative/multimap/multimap.ops/upper_bound2.fail.cpp
+++ test/std/containers/associative/multimap/multimap.ops/upper_bound2.fail.cpp
@@ -34,7 +34,7 @@
     {
     typedef std::multimap<int, double, transparent_less_private> M;
 
-    M().upper_bound(C2Int{5});
+    (void)M().upper_bound(C2Int{5});
     }
 }
 #endif
Index: test/std/containers/associative/multimap/multimap.ops/upper_bound3.fail.cpp
===================================================================
--- test/std/containers/associative/multimap/multimap.ops/upper_bound3.fail.cpp
+++ test/std/containers/associative/multimap/multimap.ops/upper_bound3.fail.cpp
@@ -34,7 +34,7 @@
     {
     typedef std::multimap<int, double, transparent_less_not_a_type> M;
 
-    M().upper_bound(C2Int{5});
+    (void)M().upper_bound(C2Int{5});
     }
 }
 #endif
Index: test/std/iterators/iterators.general/gcc_workaround.pass.cpp
===================================================================
--- test/std/iterators/iterators.general/gcc_workaround.pass.cpp
+++ test/std/iterators/iterators.general/gcc_workaround.pass.cpp
@@ -11,10 +11,10 @@
 
 #include <string>
 
-void f(const std::string &s) { s.begin(); }
+void f(const std::string &s) { (void)s.begin(); }
 
 #include <vector>
 
-void AppendTo(const std::vector<char> &v) { v.begin(); }
+void AppendTo(const std::vector<char> &v) { (void)v.begin(); }
 
 int main() {}
Index: test/std/iterators/predef.iterators/move.iterators/move.iter.ops/move.iter.nonmember/make_move_iterator.pass.cpp
===================================================================
--- test/std/iterators/predef.iterators/move.iterators/move.iter.ops/move.iter.nonmember/make_move_iterator.pass.cpp
+++ test/std/iterators/predef.iterators/move.iterators/move.iter.ops/move.iter.nonmember/make_move_iterator.pass.cpp
@@ -43,8 +43,8 @@
     }
     {
     int a[] = {1,2,3,4};
-    std::make_move_iterator(a+4);
-    std::make_move_iterator(a); // test for LWG issue 2061
+    (void)std::make_move_iterator(a+4);
+    (void)std::make_move_iterator(a); // test for LWG issue 2061
     }
 
 #if TEST_STD_VER > 14
Index: test/std/strings/basic.string/string.access/at.pass.cpp
===================================================================
--- test/std/strings/basic.string/string.access/at.pass.cpp
+++ test/std/strings/basic.string/string.access/at.pass.cpp
@@ -35,7 +35,7 @@
     {
         try
         {
-            s.at(pos);
+            (void)s.at(pos);
             assert(false);
         }
         catch (std::out_of_range&)
@@ -44,7 +44,7 @@
         }
         try
         {
-            cs.at(pos);
+            (void)cs.at(pos);
             assert(false);
         }
         catch (std::out_of_range&)
Index: test/std/strings/basic.string/string.ops/string_compare/size_size_T_size_size.pass.cpp
===================================================================
--- test/std/strings/basic.string/string.ops/string_compare/size_size_T_size_size.pass.cpp
+++ test/std/strings/basic.string/string.ops/string_compare/size_size_T_size_size.pass.cpp
@@ -45,7 +45,7 @@
     {
         try
         {
-            s.compare(pos1, n1, sv, pos2, n2);
+            (void)s.compare(pos1, n1, sv, pos2, n2);
             assert(false);
         }
         catch (const std::out_of_range&)
@@ -69,7 +69,7 @@
     {
         try
         {
-            s.compare(pos1, n1, sv, pos2);
+            (void)s.compare(pos1, n1, sv, pos2);
             assert(false);
         }
         catch (const std::out_of_range&)
Index: test/std/strings/basic.string/string.ops/string_compare/size_size_pointer.pass.cpp
===================================================================
--- test/std/strings/basic.string/string.ops/string_compare/size_size_pointer.pass.cpp
+++ test/std/strings/basic.string/string.ops/string_compare/size_size_pointer.pass.cpp
@@ -40,7 +40,7 @@
     {
         try
         {
-            s.compare(pos1, n1, str);
+            (void)s.compare(pos1, n1, str);
             assert(false);
         }
         catch (std::out_of_range&)
Index: test/std/strings/basic.string/string.ops/string_compare/size_size_pointer_size.pass.cpp
===================================================================
--- test/std/strings/basic.string/string.ops/string_compare/size_size_pointer_size.pass.cpp
+++ test/std/strings/basic.string/string.ops/string_compare/size_size_pointer_size.pass.cpp
@@ -40,7 +40,7 @@
     {
         try
         {
-            s.compare(pos, n1, str, n2);
+            (void)s.compare(pos, n1, str, n2);
             assert(false);
         }
         catch (std::out_of_range&)
Index: test/std/strings/basic.string/string.ops/string_compare/size_size_string.pass.cpp
===================================================================
--- test/std/strings/basic.string/string.ops/string_compare/size_size_string.pass.cpp
+++ test/std/strings/basic.string/string.ops/string_compare/size_size_string.pass.cpp
@@ -40,7 +40,7 @@
     {
         try
         {
-            s.compare(pos1, n1, str);
+            (void)s.compare(pos1, n1, str);
             assert(false);
         }
         catch (std::out_of_range&)
Index: test/std/strings/basic.string/string.ops/string_compare/size_size_string_size_size.pass.cpp
===================================================================
--- test/std/strings/basic.string/string.ops/string_compare/size_size_string_size_size.pass.cpp
+++ test/std/strings/basic.string/string.ops/string_compare/size_size_string_size_size.pass.cpp
@@ -42,7 +42,7 @@
     {
         try
         {
-            s.compare(pos1, n1, str, pos2, n2);
+            (void)s.compare(pos1, n1, str, pos2, n2);
             assert(false);
         }
         catch (const std::out_of_range&)
@@ -65,7 +65,7 @@
     {
         try
         {
-            s.compare(pos1, n1, str, pos2);
+            (void)s.compare(pos1, n1, str, pos2);
             assert(false);
         }
         catch (const std::out_of_range&)
Index: test/std/strings/basic.string/string.ops/string_compare/size_size_string_view.pass.cpp
===================================================================
--- test/std/strings/basic.string/string.ops/string_compare/size_size_string_view.pass.cpp
+++ test/std/strings/basic.string/string.ops/string_compare/size_size_string_view.pass.cpp
@@ -40,7 +40,7 @@
     {
         try
         {
-            s.compare(pos1, n1, sv);
+            (void)s.compare(pos1, n1, sv);
             assert(false);
         }
         catch (std::out_of_range&)
Index: test/std/strings/string.view/string.view.access/at.pass.cpp
===================================================================
--- test/std/strings/string.view/string.view.access/at.pass.cpp
+++ test/std/strings/string.view/string.view.access/at.pass.cpp
@@ -32,7 +32,7 @@
     }
 
 #ifndef TEST_HAS_NO_EXCEPTIONS
-    try { sv.at(len); } catch ( const std::out_of_range & ) { return ; }
+    try { (void)sv.at(len); } catch ( const std::out_of_range & ) { return ; }
     assert ( false );
 #endif
 }
Index: test/std/utilities/any/any.nonmembers/make_any.pass.cpp
===================================================================
--- test/std/utilities/any/any.nonmembers/make_any.pass.cpp
+++ test/std/utilities/any/any.nonmembers/make_any.pass.cpp
@@ -115,14 +115,14 @@
 {
     {
         try {
-            std::make_any<Type>(101);
+            (void)std::make_any<Type>(101);
             assert(false);
         } catch (int const&) {
         }
     }
     {
         try {
-            std::make_any<Type>({1, 2, 3}, 101);
+            (void)std::make_any<Type>({1, 2, 3}, 101);
             assert(false);
         } catch (int const&) {
         }
Index: test/std/utilities/memory/util.smartptr/util.smartptr.weak/util.smartptr.ownerless/owner_less.pass.cpp
===================================================================
--- test/std/utilities/memory/util.smartptr/util.smartptr.weak/util.smartptr.ownerless/owner_less.pass.cpp
+++ test/std/utilities/memory/util.smartptr/util.smartptr.weak/util.smartptr.ownerless/owner_less.pass.cpp
@@ -126,7 +126,7 @@
     // test heterogeneous lookups
     std::set<std::shared_ptr<X>, std::owner_less<>> s;
     std::shared_ptr<void> vp;
-    s.find(vp);
+    assert(s.find(vp) == s.end());
     }
 #endif
 }
Index: test/std/utilities/optional/optional.object/optional.object.observe/value.pass.cpp
===================================================================
--- test/std/utilities/optional/optional.object/optional.object.observe/value.pass.cpp
+++ test/std/utilities/optional/optional.object/optional.object.observe/value.pass.cpp
@@ -69,7 +69,7 @@
         optional<X> opt;
         try
         {
-            opt.value();
+            (void)opt.value();
             assert(false);
         }
         catch (const bad_optional_access&)
Index: test/std/utilities/optional/optional.object/optional.object.observe/value_const.pass.cpp
===================================================================
--- test/std/utilities/optional/optional.object/optional.object.observe/value_const.pass.cpp
+++ test/std/utilities/optional/optional.object/optional.object.observe/value_const.pass.cpp
@@ -61,7 +61,7 @@
         const optional<X> opt;
         try
         {
-            opt.value();
+            (void)opt.value();
             assert(false);
         }
         catch (const bad_optional_access&)
Index: test/std/utilities/optional/optional.object/optional.object.observe/value_const_rvalue.pass.cpp
===================================================================
--- test/std/utilities/optional/optional.object/optional.object.observe/value_const_rvalue.pass.cpp
+++ test/std/utilities/optional/optional.object/optional.object.observe/value_const_rvalue.pass.cpp
@@ -61,7 +61,7 @@
         const optional<X> opt;
         try
         {
-            std::move(opt).value();
+            (void)std::move(opt).value();
             assert(false);
         }
         catch (const bad_optional_access&)
Index: test/std/utilities/optional/optional.object/optional.object.observe/value_rvalue.pass.cpp
===================================================================
--- test/std/utilities/optional/optional.object/optional.object.observe/value_rvalue.pass.cpp
+++ test/std/utilities/optional/optional.object/optional.object.observe/value_rvalue.pass.cpp
@@ -67,7 +67,7 @@
         optional<X> opt;
         try
         {
-            std::move(opt).value();
+            (void)std::move(opt).value();
             assert(false);
         }
         catch (const bad_optional_access&)
Index: test/std/utilities/variant/variant.get/get_index.pass.cpp
===================================================================
--- test/std/utilities/variant/variant.get/get_index.pass.cpp
+++ test/std/utilities/variant/variant.get/get_index.pass.cpp
@@ -259,7 +259,7 @@
   auto test = [](auto idx, auto &&v) {
     using Idx = decltype(idx);
     try {
-      std::get<Idx::value>(std::forward<decltype(v)>(v));
+      (void)std::get<Idx::value>(std::forward<decltype(v)>(v));
     } catch (const std::bad_variant_access &) {
       return true;
     } catch (...) { /* ... */
Index: test/std/utilities/variant/variant.get/get_type.pass.cpp
===================================================================
--- test/std/utilities/variant/variant.get/get_type.pass.cpp
+++ test/std/utilities/variant/variant.get/get_type.pass.cpp
@@ -259,7 +259,7 @@
   auto test = [](auto idx, auto &&v) {
     using Idx = decltype(idx);
     try {
-      std::get<typename Idx::type>(std::forward<decltype(v)>(v));
+      (void)std::get<typename Idx::type>(std::forward<decltype(v)>(v));
     } catch (const std::bad_variant_access &) {
       return true;
     } catch (...) { /* ... */