diff --git a/clang/unittests/AST/CMakeLists.txt b/clang/unittests/AST/CMakeLists.txt
index 868635b6eea56b..5d9ff5b97dbd46 100644
--- a/clang/unittests/AST/CMakeLists.txt
+++ b/clang/unittests/AST/CMakeLists.txt
@@ -43,5 +43,9 @@ clang_target_link_libraries(ASTTests
   clangFrontend
   clangSerialization
   clangTooling
-  LLVMTestingSupport
   )
+
+target_link_libraries(ASTTests
+  PRIVATE
+  LLVMTestingSupport
+)