diff --git a/cmake/clang_flags.cmake b/cmake/clang_flags.cmake
index b3dfa3144..aea17820c 100644
--- a/cmake/clang_flags.cmake
+++ b/cmake/clang_flags.cmake
@@ -5,8 +5,11 @@
 # -Wno-extra-semi-stmt            The library uses assert which triggers this warning.
 # -Wno-padded                     We do not care about padding warnings.
 # -Wno-covered-switch-default     All switches list all cases and a default case.
-# -Wno-unsafe-buffer-usage        Otherwise Doctest would not compile.
-# -Wno-missing-noreturn           We found no way to silence this warning otherwise, see PR #4871
+# -Wno-unsafe-buffer-usage        Pervasive: the library's own low-level numeric/buffer code
+#                                 (to_chars, serializer, lexer, binary reader/writer, input
+#                                 adapters, json_pointer) plus vendored Doctest itself (~208
+#                                 distinct sites measured 2026-07-08 on clang trunk) all use
+#                                 raw pointer arithmetic / libc string calls by necessity.
 
 set(CLANG_CXXFLAGS
     -Werror
@@ -18,5 +21,4 @@ set(CLANG_CXXFLAGS
     -Wno-padded
     -Wno-covered-switch-default
     -Wno-unsafe-buffer-usage
-    -Wno-missing-noreturn
 )
diff --git a/include/nlohmann/detail/input/input_adapters.hpp b/include/nlohmann/detail/input/input_adapters.hpp
index 94af90202..920a26adc 100644
--- a/include/nlohmann/detail/input/input_adapters.hpp
+++ b/include/nlohmann/detail/input/input_adapters.hpp
@@ -430,7 +430,7 @@ class wide_string_input_adapter
 
     // parsing binary with wchar doesn't make sense, but since the parsing mode can be runtime, we need something here
     template<class T>
-    std::size_t get_elements(T* /*dest*/, std::size_t /*count*/ = 1)
+    JSON_HEDLEY_NO_RETURN std::size_t get_elements(T* /*dest*/, std::size_t /*count*/ = 1)
     {
         JSON_THROW(parse_error::create(112, 1, "wide string type cannot be interpreted as binary data", nullptr));
     }
diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp
index 5c022253a..c083d0b29 100644
--- a/single_include/nlohmann/json.hpp
+++ b/single_include/nlohmann/json.hpp
@@ -7262,7 +7262,7 @@ class wide_string_input_adapter
 
     // parsing binary with wchar doesn't make sense, but since the parsing mode can be runtime, we need something here
     template<class T>
-    std::size_t get_elements(T* /*dest*/, std::size_t /*count*/ = 1)
+    JSON_HEDLEY_NO_RETURN std::size_t get_elements(T* /*dest*/, std::size_t /*count*/ = 1)
     {
         JSON_THROW(parse_error::create(112, 1, "wide string type cannot be interpreted as binary data", nullptr));
     }
diff --git a/tests/src/unit-allocator.cpp b/tests/src/unit-allocator.cpp
index 6f2c70148..2dbb746b0 100644
--- a/tests/src/unit-allocator.cpp
+++ b/tests/src/unit-allocator.cpp
@@ -24,7 +24,7 @@ struct bad_allocator : std::allocator<T>
     template<class U> bad_allocator(const bad_allocator<U>& /*unused*/) { }
 
     template<class... Args>
-    void construct(T* /*unused*/, Args&& ... /*unused*/) // NOLINT(cppcoreguidelines-missing-std-forward)
+    [[noreturn]] void construct(T* /*unused*/, Args&& ... /*unused*/) // NOLINT(cppcoreguidelines-missing-std-forward)
     {
         throw std::bad_alloc();
     }