Index: clang-tidy/modernize/UseNodiscardCheck.cpp
===================================================================
--- clang-tidy/modernize/UseNodiscardCheck.cpp
+++ clang-tidy/modernize/UseNodiscardCheck.cpp
@@ -100,7 +100,9 @@
       cxxMethodDecl(
           allOf(isConst(), isDefinitionOrInline(),
                 unless(anyOf(
-                    returns(voidType()), isNoReturn(), isOverloadedOperator(),
+                    returns(voidType()),
+                    returns(hasDeclaration(decl(hasAttr(clang::attr::WarnUnusedResult)))),
+                    isNoReturn(), isOverloadedOperator(),
                     isVariadic(), hasTemplateReturnType(),
                     hasClassMutableFields(), isConversionOperator(),
                     hasAttr(clang::attr::WarnUnusedResult),
Index: test/clang-tidy/checkers/modernize-use-nodiscard.cpp
===================================================================
--- test/clang-tidy/checkers/modernize-use-nodiscard.cpp
+++ test/clang-tidy/checkers/modernize-use-nodiscard.cpp
@@ -23,6 +23,8 @@
 typedef unsigned &my_unsigned_reference;
 typedef const unsigned &my_unsigned_const_reference;
 
+struct NO_DISCARD NoDiscardStruct{};
+
 class Foo {
 public:
     using size_type = unsigned;
@@ -160,6 +162,9 @@
 
     // Do not add ``[[nodiscard]]`` to conversion functions.
     // explicit operator bool() const { return true; }
+
+    // Do not add ``[[nodiscard]]`` to functions returning types marked [[nodiscard]].
+    NoDiscardStruct f50() const;
 };
 
 // Do not add ``[[nodiscard]]`` to Lambda.