diff --git a/lldb/packages/Python/lldbsuite/test/decorators.py b/lldb/packages/Python/lldbsuite/test/decorators.py
index 2e44ee318dac0..36d800b61a95f 100644
--- a/lldb/packages/Python/lldbsuite/test/decorators.py
+++ b/lldb/packages/Python/lldbsuite/test/decorators.py
@@ -551,6 +551,16 @@ def are_sb_headers_missing():
     return skipTestIfFn(are_sb_headers_missing)(func)
 
 
+def skipIfRosetta(bugnumber):
+    """Skip a test when running the testsuite on macOS under the Rosetta translation layer."""
+    def is_running_rosetta(self):
+        if not lldbplatformutil.getPlatform() in ['darwin', 'macosx']:
+            return "not on macOS"
+        if (platform.uname()[5] == "arm") and (self.getArchitecture() == "x86_64"):
+            return "skipped under Rosetta"
+        return None
+    return skipTestIfFn(is_running_rosetta)
+
 def skipIfiOSSimulator(func):
     """Decorate the item to skip tests that should be skipped on the iOS Simulator."""
     def is_ios_simulator():