Index: test/std/containers/container.adaptors/queue/queue.cons.alloc/ctor_container_alloc.pass.cpp
===================================================================
--- test/std/containers/container.adaptors/queue/queue.cons.alloc/ctor_container_alloc.pass.cpp
+++ test/std/containers/container.adaptors/queue/queue.cons.alloc/ctor_container_alloc.pass.cpp
@@ -50,7 +50,7 @@
     test q(d, test_allocator<int>(4));
     assert(q.get_allocator() == test_allocator<int>(4));
     assert(q.size() == 5);
-    for (std::size_t i = 0; i < d.size(); ++i)
+    for (C::size_type i = 0; i < d.size(); ++i)
     {
         assert(q.front() == d[i]);
         q.pop();
Index: test/std/containers/container.adaptors/stack/stack.cons.alloc/ctor_container_alloc.pass.cpp
===================================================================
--- test/std/containers/container.adaptors/stack/stack.cons.alloc/ctor_container_alloc.pass.cpp
+++ test/std/containers/container.adaptors/stack/stack.cons.alloc/ctor_container_alloc.pass.cpp
@@ -50,7 +50,7 @@
     test q(d, test_allocator<int>(4));
     assert(q.get_allocator() == test_allocator<int>(4));
     assert(q.size() == 5);
-    for (std::size_t i = 0; i < d.size(); ++i)
+    for (C::size_type i = 0; i < d.size(); ++i)
     {
         assert(q.top() == d[d.size() - i - 1]);
         q.pop();
Index: test/std/containers/sequences/vector/contiguous.pass.cpp
===================================================================
--- test/std/containers/sequences/vector/contiguous.pass.cpp
+++ test/std/containers/sequences/vector/contiguous.pass.cpp
@@ -21,7 +21,7 @@
 void test_contiguous ( const C &c )
 {
     for ( size_t i = 0; i < c.size(); ++i )
-        assert ( *(c.begin() + i) == *(std::addressof(*c.begin()) + i));
+        assert ( *(c.begin() + static_cast<typename C::difference_type>(i)) == *(std::addressof(*c.begin()) + i));
 }
 
 int main()
Index: test/std/strings/basic.string/string.require/contiguous.pass.cpp
===================================================================
--- test/std/strings/basic.string/string.require/contiguous.pass.cpp
+++ test/std/strings/basic.string/string.require/contiguous.pass.cpp
@@ -22,7 +22,7 @@
 void test_contiguous ( const C &c )
 {
     for ( size_t i = 0; i < c.size(); ++i )
-        assert ( *(c.begin() + i) == *(std::addressof(*c.begin()) + i));
+        assert ( *(c.begin() + static_cast<typename C::difference_type>(i)) == *(std::addressof(*c.begin()) + i));
 }
 
 int main()