diff --git a/clang/test/Index/index-concept-kind.cpp b/clang/test/Index/index-concept-kind.cpp
index 7aaf814f5f989a..f33fc6bc5cc0d2 100644
--- a/clang/test/Index/index-concept-kind.cpp
+++ b/clang/test/Index/index-concept-kind.cpp
@@ -1,5 +1,5 @@
 // RUN: c-index-test -index-file %s -std=gnu++20 | FileCheck %s
-
+// UNSUPPORTED: aix
 template <typename T>
 concept LargeType = sizeof(T) > 8;
 // CHECK: [indexDeclaration]: kind: concept | name: LargeType | USR: c:@CT@LargeType | lang: C | cursor: ConceptDecl=LargeType:[[@LINE-1]]:9 (Definition) | loc: [[@LINE-1]]:9 | semantic-container: [TU] | lexical-container: [TU] | isRedecl: 0 | isDef: 1 | isContainer: 0 | isImplicit: 0
diff --git a/clang/test/Index/index-concepts.cpp b/clang/test/Index/index-concepts.cpp
index 9887e9fdc6541c..ba4b87111ff487 100644
--- a/clang/test/Index/index-concepts.cpp
+++ b/clang/test/Index/index-concepts.cpp
@@ -1,5 +1,5 @@
 // RUN: c-index-test -test-load-source all %s -std=gnu++20 -fno-delayed-template-parsing | FileCheck %s
-
+// UNSUPPORTED: aix
 template<class T>
 struct type_trait {
     const static bool value = false;