diff --git a/lldb/test/API/functionalities/rerun_and_expr_dylib/TestRerunAndExprDylib.py b/lldb/test/API/functionalities/rerun_and_expr_dylib/TestRerunAndExprDylib.py
index fb4cc3248e20f..1a6944e6fd9bb 100644
--- a/lldb/test/API/functionalities/rerun_and_expr_dylib/TestRerunAndExprDylib.py
+++ b/lldb/test/API/functionalities/rerun_and_expr_dylib/TestRerunAndExprDylib.py
@@ -9,7 +9,24 @@
 from lldbsuite.test import lldbutil
 from lldbsuite.test.decorators import *
 
+
+def isUbuntu18_04():
+    """
+    Check if the host OS is Ubuntu 18.04.
+    Derived from `platform.freedesktop_os_release` in Python 3.10.
+    """
+    for path in ("/etc/os-release", "/usr/lib/os-release"):
+        if os.path.exists(path):
+            with open(path) as f:
+                contents = f.read()
+            if "Ubuntu 18.04" in contents:
+                return True
+
+    return False
+
+
 class TestRerunExprDylib(TestBase):
+    @skipTestIfFn(isUbuntu18_04, bugnumber="rdar://103831050")
     @skipIfWindows
     def test(self):
         """