diff --git a/lldb/test/API/functionalities/thread_plan/TestThreadPlanCommands.py b/lldb/test/API/functionalities/thread_plan/TestThreadPlanCommands.py
index b4ae9107aceb1..5214a3f6b0fe2 100644
--- a/lldb/test/API/functionalities/thread_plan/TestThreadPlanCommands.py
+++ b/lldb/test/API/functionalities/thread_plan/TestThreadPlanCommands.py
@@ -17,7 +17,7 @@ class TestThreadPlanCommands(TestBase):
     NO_DEBUG_INFO_TESTCASE = True
 
     @skipIfWindows
-    @expectedFailureAll(oslist=["Linux"])
+    @expectedFailureAll(oslist=["linux"])
     def test_thread_plan_actions(self):
         self.build()
         self.main_source_file = lldb.SBFileSpec("main.c")