diff --git a/libcxx/test/std/containers/associative/map/map.erasure/erase_if.pass.cpp b/libcxx/test/std/containers/associative/map/map.erasure/erase_if.pass.cpp
index f7442f4cfb9f..af2d35c66ec0 100644
--- a/libcxx/test/std/containers/associative/map/map.erasure/erase_if.pass.cpp
+++ b/libcxx/test/std/containers/associative/map/map.erasure/erase_if.pass.cpp
@@ -24,7 +24,7 @@ M make (Init vals)
 {
     M ret;
     for (int v : vals)
-        ret[v] = v + 10;
+        ret[static_cast<typename M::key_type>(v)] = static_cast<typename M::mapped_type>(v + 10);
     return ret;
 }
 
diff --git a/libcxx/test/std/containers/associative/multimap/multimap.erasure/erase_if.pass.cpp b/libcxx/test/std/containers/associative/multimap/multimap.erasure/erase_if.pass.cpp
index 4655da4b2dc2..6f2d56a9730d 100644
--- a/libcxx/test/std/containers/associative/multimap/multimap.erasure/erase_if.pass.cpp
+++ b/libcxx/test/std/containers/associative/multimap/multimap.erasure/erase_if.pass.cpp
@@ -24,7 +24,7 @@ M make (Init vals)
 {
     M ret;
     for (int v : vals)
-        ret.insert(typename M::value_type(v, v + 10));
+        ret.emplace(static_cast<typename M::key_type>(v), static_cast<typename M::mapped_type>(v + 10));
     return ret;
 }
 
diff --git a/libcxx/test/std/containers/sequences/vector/vector.cons/construct_iter_iter.pass.cpp b/libcxx/test/std/containers/sequences/vector/vector.cons/construct_iter_iter.pass.cpp
index 28c51eb0348e..2b3b212aecde 100644
--- a/libcxx/test/std/containers/sequences/vector/vector.cons/construct_iter_iter.pass.cpp
+++ b/libcxx/test/std/containers/sequences/vector/vector.cons/construct_iter_iter.pass.cpp
@@ -156,7 +156,14 @@ void test_ctor_with_different_value_type() {
     // Make sure initialization is performed with each element value, not with
     // a memory blob.
     float array[3] = {0.0f, 1.0f, 2.0f};
+#ifdef TEST_COMPILER_C1XX
+    #pragma warning(push)
+    #pragma warning(disable: 4244) // conversion from 'float' to 'int', possible loss of data
+#endif // TEST_COMPILER_C1XX
     std::vector<int> v(array, array + 3);
+#ifdef TEST_COMPILER_C1XX
+    #pragma warning(pop)
+#endif // TEST_COMPILER_C1XX
     assert(v[0] == 0);
     assert(v[1] == 1);
     assert(v[2] == 2);
diff --git a/libcxx/test/std/containers/unord/unord.map/erase_if.pass.cpp b/libcxx/test/std/containers/unord/unord.map/erase_if.pass.cpp
index 652e6f6b49f5..2f188655ca81 100644
--- a/libcxx/test/std/containers/unord/unord.map/erase_if.pass.cpp
+++ b/libcxx/test/std/containers/unord/unord.map/erase_if.pass.cpp
@@ -24,7 +24,7 @@ M make (Init vals)
 {
     M ret;
     for (int v : vals)
-        ret[v] = v + 10;
+        ret[static_cast<typename M::key_type>(v)] = static_cast<typename M::mapped_type>(v + 10);
     return ret;
 }
 
diff --git a/libcxx/test/std/containers/unord/unord.multimap/erase_if.pass.cpp b/libcxx/test/std/containers/unord/unord.multimap/erase_if.pass.cpp
index 6da279e915da..23d18872d142 100644
--- a/libcxx/test/std/containers/unord/unord.multimap/erase_if.pass.cpp
+++ b/libcxx/test/std/containers/unord/unord.multimap/erase_if.pass.cpp
@@ -24,7 +24,7 @@ M make (Init vals)
 {
     M ret;
     for (int v : vals)
-        ret.insert(typename M::value_type(v, v + 10));
+        ret.emplace(static_cast<typename M::key_type>(v), static_cast<typename M::mapped_type>(v + 10));
     return ret;
 }
 
diff --git a/libcxx/test/std/numerics/numarray/template.valarray/valarray.members/max.pass.cpp b/libcxx/test/std/numerics/numarray/template.valarray/valarray.members/max.pass.cpp
index fcc57453c05d..4c65d7f21191 100644
--- a/libcxx/test/std/numerics/numarray/template.valarray/valarray.members/max.pass.cpp
+++ b/libcxx/test/std/numerics/numarray/template.valarray/valarray.members/max.pass.cpp
@@ -26,11 +26,6 @@ int main(int, char**)
         std::valarray<T> v1(a1, N1);
         assert(v1.max() == 4.0);
     }
-    {
-        typedef double T;
-        std::valarray<T> v1;
-        v1.max();
-    }
     {
         typedef double T;
         T a1[] = {1.5, 2.5, -3, 4, -5.5};
diff --git a/libcxx/test/std/numerics/numarray/template.valarray/valarray.members/min.pass.cpp b/libcxx/test/std/numerics/numarray/template.valarray/valarray.members/min.pass.cpp
index 8534e3fd681a..314552aa1177 100644
--- a/libcxx/test/std/numerics/numarray/template.valarray/valarray.members/min.pass.cpp
+++ b/libcxx/test/std/numerics/numarray/template.valarray/valarray.members/min.pass.cpp
@@ -26,11 +26,6 @@ int main(int, char**)
         std::valarray<T> v1(a1, N1);
         assert(v1.min() == -3.0);
     }
-    {
-        typedef double T;
-        std::valarray<T> v1;
-        v1.min();
-    }
     {
         typedef double T;
         T a1[] = {1.5, 2.5, -3, 4, 5.5};
diff --git a/libcxx/test/std/utilities/meta/meta.const.eval/is_constant_evaluated.pass.cpp b/libcxx/test/std/utilities/meta/meta.const.eval/is_constant_evaluated.pass.cpp
index e4b8a7575b0b..a1fdd2882400 100644
--- a/libcxx/test/std/utilities/meta/meta.const.eval/is_constant_evaluated.pass.cpp
+++ b/libcxx/test/std/utilities/meta/meta.const.eval/is_constant_evaluated.pass.cpp
@@ -34,6 +34,10 @@ template <bool> struct InTemplate {};
 int main(int, char**)
 {
 #ifdef __cpp_lib_is_constant_evaluated
+#ifdef TEST_COMPILER_C1XX
+    #pragma warning(push)
+    #pragma warning(disable: 5063) // 'std::is_constant_evaluated' always evaluates to true in manifestly constant-evaluated expressions
+#endif // TEST_COMPILER_C1XX
   // Test the signature
   {
     ASSERT_SAME_TYPE(decltype(std::is_constant_evaluated()), bool);
@@ -51,6 +55,9 @@ int main(int, char**)
     static int local_static = std::is_constant_evaluated() ? 42 : -1;
     assert(local_static == 42);
   }
-#endif
+#ifdef TEST_COMPILER_C1XX
+    #pragma warning(pop)
+#endif // TEST_COMPILER_C1XX
+#endif // __cpp_lib_is_constant_evaluated
   return 0;
 }
diff --git a/libcxx/test/support/charconv_test_helpers.h b/libcxx/test/support/charconv_test_helpers.h
index f30956e9a73e..4ef4288a34fc 100644
--- a/libcxx/test/support/charconv_test_helpers.h
+++ b/libcxx/test/support/charconv_test_helpers.h
@@ -174,6 +174,10 @@ struct roundtrip_test_base
 
             r2 = from_chars(buf, r.ptr, x, args...);
 
+#ifdef TEST_COMPILER_C1XX
+    #pragma warning(push)
+    #pragma warning(disable: 4127) // conditional expression is constant
+#endif // TEST_COMPILER_C1XX
             if (std::is_signed<T>::value && v < 0 && std::is_unsigned<X>::value)
             {
                 assert(x == 0xc);
@@ -186,6 +190,9 @@ struct roundtrip_test_base
                 assert(r2.ptr == r.ptr);
                 assert(r2.ec == std::errc::result_out_of_range);
             }
+#ifdef TEST_COMPILER_C1XX
+    #pragma warning(pop)
+#endif // TEST_COMPILER_C1XX
         }
     }
 
diff --git a/libcxx/test/support/msvc_stdlib_force_include.h b/libcxx/test/support/msvc_stdlib_force_include.h
index 2ec74e85a2ae..e3352e52043e 100644
--- a/libcxx/test/support/msvc_stdlib_force_include.h
+++ b/libcxx/test/support/msvc_stdlib_force_include.h
@@ -88,5 +88,7 @@ const AssertionDialogAvoider assertion_dialog_avoider{};
 #endif
 
 #define _LIBCPP_AVAILABILITY_THROW_BAD_ANY_CAST
+#define _LIBCPP_SUPPRESS_DEPRECATED_PUSH
+#define _LIBCPP_SUPPRESS_DEPRECATED_POP
 
 #endif // SUPPORT_MSVC_STDLIB_FORCE_INCLUDE_H