diff --git a/lldb/test/API/lang/cpp/const_static_integral_member_int128/TestConstStaticIntegralMemberInt128.py b/lldb/test/API/lang/cpp/const_static_integral_member_int128/TestConstStaticIntegralMemberInt128.py
--- a/lldb/test/API/lang/cpp/const_static_integral_member_int128/TestConstStaticIntegralMemberInt128.py
+++ b/lldb/test/API/lang/cpp/const_static_integral_member_int128/TestConstStaticIntegralMemberInt128.py
@@ -12,6 +12,8 @@
 
     mydir = TestBase.compute_mydir(__file__)
 
+    # uint128_t not available on arm.
+    @skipIf(archs=["arm", "aarch64"])
     def test_int128(self):
         self.build()
         lldbutil.run_to_source_breakpoint(self, "// break here",