diff --git a/compiler-rt/test/ubsan_minimal/lit.common.cfg b/compiler-rt/test/ubsan_minimal/lit.common.cfg
index e8b42bb823c8..5fa44c7707c7 100644
--- a/compiler-rt/test/ubsan_minimal/lit.common.cfg
+++ b/compiler-rt/test/ubsan_minimal/lit.common.cfg
@@ -37,4 +37,9 @@ if config.host_os not in ['Linux', 'FreeBSD', 'NetBSD', 'Darwin']: # TODO: Windo
 if '-arch x86_64h' in target_cflags and 'x86_64h' not in config.available_features:
   config.unsupported = True
 
+# Temporarily disable all x86_64h testing on Darwin to unblock the public bots,
+# while we investigate rdar://problem/34409349
+if config.host_os == 'Darwin' and 'x86_64h' in target_cflags:
+  config.unsupported = True
+
 config.available_features.add('arch=' + config.target_arch)