--- a/python/mozbuild/mozbuild/mach_commands.py
+++ b/python/mozbuild/mozbuild/mach_commands.py
@@ -1695,17 +1695,17 @@ class StaticAnalysis(MachCommandBase):
                 total = total + 1
 
         if not total:
             return 0
 
         cwd = self.topobjdir
         self._compilation_commands_path = self.topobjdir
         args = self._get_clang_tidy_command(
-            check=checks, header_filter=header_filter, sources=source, jobs=jobs, fix=fix)
+            checks=checks, header_filter=header_filter, sources=source, jobs=jobs, fix=fix)
 
         monitor = StaticAnalysisMonitor(self.topsrcdir, self.topobjdir, total)
 
         footer = StaticAnalysisFooter(self.log_manager.terminal, monitor)
         with StaticAnalysisOutputManager(self.log_manager, monitor, footer) as output:
             rc = self.run_process(args=args, line_handler=output.on_line, cwd=cwd)
 
             self.log(logging.WARNING, 'warning_summary',