diff --git a/clang/unittests/ASTMatchers/ASTMatchersTest.h b/clang/unittests/ASTMatchers/ASTMatchersTest.h
--- a/clang/unittests/ASTMatchers/ASTMatchersTest.h
+++ b/clang/unittests/ASTMatchers/ASTMatchersTest.h
@@ -59,24 +59,23 @@
 };
 
 inline ArrayRef<TestLanguage> langCxx11OrLater() {
-  static std::vector<TestLanguage> Result = {Lang_CXX11, Lang_CXX14, Lang_CXX17,
-                                             Lang_CXX20};
+  static const TestLanguage Result[] = {Lang_CXX11, Lang_CXX14, Lang_CXX17,
+                                        Lang_CXX20};
   return Result;
 }
 
 inline ArrayRef<TestLanguage> langCxx14OrLater() {
-  static std::vector<TestLanguage> Result = {Lang_CXX14, Lang_CXX17,
-                                             Lang_CXX20};
+  static const TestLanguage Result[] = {Lang_CXX14, Lang_CXX17, Lang_CXX20};
   return Result;
 }
 
 inline ArrayRef<TestLanguage> langCxx17OrLater() {
-  static std::vector<TestLanguage> Result = {Lang_CXX17, Lang_CXX20};
+  static const TestLanguage Result[] = {Lang_CXX17, Lang_CXX20};
   return Result;
 }
 
 inline ArrayRef<TestLanguage> langCxx20OrLater() {
-  static std::vector<TestLanguage> Result = {Lang_CXX20};
+  static const TestLanguage Result[] = {Lang_CXX20};
   return Result;
 }