diff --git a/tests/test_builtin_casters.cpp b/tests/test_builtin_casters.cpp
index 01f06f0b7..6ff63edfc 100644
--- a/tests/test_builtin_casters.cpp
+++ b/tests/test_builtin_casters.cpp
@@ -269,9 +269,7 @@ TEST_SUBMODULE(builtin_casters, m) {
     m.def(
         "int_string_pair",
         []() {
-            // Using no-destructor idiom to side-step overzealous MINGW GNU 12.1.0
-            // 'void operator delete(void*)' called on unallocated object 'int_string_pair'
-            // warning (observed with windows-latest mingw32, mingw64 @ 2022-07-18).
+            // Using no-destructor idiom to side-step warnings from overzealous compilers.
             static auto *int_string_pair = new std::pair<int, std::string>{2, "items"};
             return int_string_pair;
         },
diff --git a/tests/test_stl.cpp b/tests/test_stl.cpp
index 38d32fda9..dd118f63c 100644
--- a/tests/test_stl.cpp
+++ b/tests/test_stl.cpp
@@ -178,7 +178,13 @@ TEST_SUBMODULE(stl, m) {
     // Unnumbered regression (caused by #936): pointers to stl containers aren't castable
     static std::vector<RValueCaster> lvv{2};
     m.def(
-        "cast_ptr_vector", []() { return &lvv; }, py::return_value_policy::reference);
+        "cast_ptr_vector",
+        []() {
+            // Using no-destructor idiom to side-step warnings from overzealous compilers.
+            static auto *lvv = new std::vector<RValueCaster>{2};
+            return lvv;
+        },
+        py::return_value_policy::reference);
 
     // test_deque
     m.def("cast_deque", []() { return std::deque<int>{1}; });