diff --git a/lldb/test/API/functionalities/data-formatter/builtin-formats/TestBuiltinFormats.py b/lldb/test/API/functionalities/data-formatter/builtin-formats/TestBuiltinFormats.py
index 1fbb3929fa4b8b..9fefae6bbf5c6e 100644
--- a/lldb/test/API/functionalities/data-formatter/builtin-formats/TestBuiltinFormats.py
+++ b/lldb/test/API/functionalities/data-formatter/builtin-formats/TestBuiltinFormats.py
@@ -23,6 +23,8 @@ def getFormatted(self, format, expr):
 
     @no_debug_info_test
     @skipIfWindows
+    # uint128_t not available on arm.
+    @skipIf(archs=['arm', 'aarch64'])
     def test(self):
         self.build()
         lldbutil.run_to_source_breakpoint(self, "// break here", lldb.SBFileSpec("main.cpp"))