Fix tiered compilation option for case-sensitive systems (#19567)

diff --git a/tests/scripts/run-xunit-perf.py b/tests/scripts/run-xunit-perf.py
index ac5de7b..f9b5690 100755 (executable)
--- a/tests/scripts/run-xunit-perf.py
+++ b/tests/scripts/run-xunit-perf.py
@@ -457,9 +457,9 @@ def main(args):
     # Set up environment for running tests
     if optLevel == 'min_opts':
         myEnv['COMPlus_JITMinOpts'] = '1'
-        myEnv['COMPLUS_TieredCompilation'] = '0'
+        myEnv['COMPlus_TieredCompilation'] = '0'
     elif optLevel == 'full_opt':
-        myEnv['COMPLUS_TieredCompilation'] = '0'
+        myEnv['COMPlus_TieredCompilation'] = '0'
 
     if not 'XUNIT_PERFORMANCE_MAX_ITERATION' in myEnv:
         myEnv['XUNIT_PERFORMANCE_MAX_ITERATION'] = '21'