diff --git a/clang/lib/Frontend/InitPreprocessor.cpp b/clang/lib/Frontend/InitPreprocessor.cpp
--- a/clang/lib/Frontend/InitPreprocessor.cpp
+++ b/clang/lib/Frontend/InitPreprocessor.cpp
@@ -697,10 +697,11 @@
     Builder.defineMacro("__cpp_multidimensional_subscript", "202110L");
   }
 
-  // We provide this as an extension in earlier language modes, so we
-  // also define the macro.
+  // We provide those C++2b features as extensions in earlier language modes, so
+  // we also define their feature test macros.
   if (LangOpts.CPlusPlus11)
     Builder.defineMacro("__cpp_static_call_operator", "202207L");
+  Builder.defineMacro("__cpp_named_character_escapes", "202207L");
 
   if (LangOpts.Char8)
     Builder.defineMacro("__cpp_char8_t", "201811L");
diff --git a/clang/test/Lexer/cxx-features.cpp b/clang/test/Lexer/cxx-features.cpp
--- a/clang/test/Lexer/cxx-features.cpp
+++ b/clang/test/Lexer/cxx-features.cpp
@@ -51,7 +51,7 @@
 #error "wrong value for __cpp_static_call_operator"
 #endif
 
-#if check(named_character_escapes, 0, 0, 0, 0, 0, 0)
+#if check(named_character_escapes, 202207, 202207, 202207, 202207, 202207, 202207)
 #error "wrong value for __cpp_named_character_escapes"
 #endif