diff --git a/clang/utils/perf-training/lit.cfg b/clang/utils/perf-training/lit.cfg
--- a/clang/utils/perf-training/lit.cfg
+++ b/clang/utils/perf-training/lit.cfg
@@ -25,7 +25,7 @@
 config.clang = lit.util.which('clang', config.clang_tools_dir).replace('\\', '/')
 
 config.name = 'Clang Perf Training'
-config.suffixes = ['.c', '.cpp', '.m', '.mm', '.cu', '.ll', '.cl', '.s', '.S', '.modulemap']
+config.suffixes = ['.c', '.cc', '.cpp', '.m', '.mm', '.cu', '.ll', '.cl', '.s', '.S', '.modulemap', '.test']
 
 cc1_wrapper = '%s %s/perf-helper.py cc1' % (config.python_exe, config.perf_helper_dir)
 
diff --git a/clang/utils/perf-training/order-files.lit.cfg b/clang/utils/perf-training/order-files.lit.cfg
--- a/clang/utils/perf-training/order-files.lit.cfg
+++ b/clang/utils/perf-training/order-files.lit.cfg
@@ -26,7 +26,7 @@
 config.clang = os.path.realpath(lit.util.which('clang', config.clang_tools_dir)).replace('\\', '/')
 
 config.name = 'Clang Perf Training'
-config.suffixes = ['.c', '.cpp', '.m', '.mm', '.cu', '.ll', '.cl', '.s', '.S', '.modulemap']
+config.suffixes = ['.c', '.cc', '.cpp', '.m', '.mm', '.cu', '.ll', '.cl', '.s', '.S', '.modulemap', '.test']
 
 dtrace_wrapper = '%s %s/perf-helper.py dtrace' % (config.python_exe, config.perf_helper_dir)
 dtrace_wrapper_cc1 = '%s %s/perf-helper.py dtrace --cc1' % (config.python_exe, config.perf_helper_dir)