diff --git a/include/pybind11/eigen/matrix.h b/include/pybind11/eigen/matrix.h
index 859c7d1a6..d8f459b7c 100644
--- a/include/pybind11/eigen/matrix.h
+++ b/include/pybind11/eigen/matrix.h
@@ -19,7 +19,9 @@
 PYBIND11_WARNING_PUSH
 PYBIND11_WARNING_DISABLE_MSVC(5054) // https://github.com/pybind/pybind11/pull/3741
 //       C5054: operator '&': deprecated between enumerations of different types
+#if defined(__MINGW32__)
 PYBIND11_WARNING_DISABLE_GCC("-Wmaybe-uninitialized")
+#endif
 
 #include <Eigen/Core>
 #include <Eigen/SparseCore>
diff --git a/include/pybind11/eigen/tensor.h b/include/pybind11/eigen/tensor.h
index 20cbff1c9..acb64b9ce 100644
--- a/include/pybind11/eigen/tensor.h
+++ b/include/pybind11/eigen/tensor.h
@@ -17,7 +17,9 @@ static_assert(__GNUC__ > 5, "Eigen Tensor support in pybind11 requires GCC > 5.0
 PYBIND11_WARNING_PUSH
 PYBIND11_WARNING_DISABLE_MSVC(4554)
 PYBIND11_WARNING_DISABLE_MSVC(4127)
+#if defined(__MINGW32__)
 PYBIND11_WARNING_DISABLE_GCC("-Wmaybe-uninitialized")
+#endif
 
 #include <unsupported/Eigen/CXX11/Tensor>
 
diff --git a/include/pybind11/numpy.h b/include/pybind11/numpy.h
index 8f072af26..854d6e87f 100644
--- a/include/pybind11/numpy.h
+++ b/include/pybind11/numpy.h
@@ -1121,10 +1121,10 @@ public:
 
     /**
      * Returns a proxy object that provides const access to the array's data without bounds or
-     * dimensionality checking.  Unlike `unchecked()`, this does not require that the underlying
-     * array have the `writable` flag.  Use with care: the array must not be destroyed or reshaped
-     * for the duration of the returned object, and the caller must take care not to access invalid
-     * dimensions or dimension indices.
+     * dimensionality checking.  Unlike `mutable_unchecked()`, this does not require that the
+     * underlying array have the `writable` flag.  Use with care: the array must not be destroyed
+     * or reshaped for the duration of the returned object, and the caller must take care not to
+     * access invalid dimensions or dimension indices.
      */
     template <ssize_t Dims = -1>
     detail::unchecked_reference<T, Dims> unchecked() const & {
diff --git a/pybind11/setup_helpers.py b/pybind11/setup_helpers.py
index 1db479532..b9b433b65 100644
--- a/pybind11/setup_helpers.py
+++ b/pybind11/setup_helpers.py
@@ -174,7 +174,9 @@ class Pybind11Extension(_Extension):  # type: ignore[misc]
     @cxx_std.setter
     def cxx_std(self, level: int) -> None:
         if self._cxx_level:
-            warnings.warn("You cannot safely change the cxx_level after setting it!")
+            warnings.warn(
+                "You cannot safely change the cxx_level after setting it!", stacklevel=2
+            )
 
         # MSVC 2015 Update 3 and later only have 14 (and later 17) modes, so
         # force a valid flag here.