--- a/python/mozbuild/mozbuild/mach_commands.py
+++ b/python/mozbuild/mozbuild/mach_commands.py
@@ -1829,17 +1829,17 @@ class StaticAnalysis(MachCommandBase):
         rc = self._get_clang_tools(force=True, skip_cache=skip_cache,
                                    source=source, verbose=verbose)
         return rc
 
     @StaticAnalysisSubCommand('static-analysis', 'clear-cache',
                               'Delete local helpers and reset static analysis helper tool cache')
     def clear_cache(self, verbose=False):
         self._set_log_level(verbose)
-        rc = self._get_clang_tools(force=True, download_if_needed=False,
+        rc = self._get_clang_tools(force=True, download_if_needed=True, skip_cache=True,
                                    verbose=verbose)
         if rc != 0:
             return rc
 
         self._artifact_manager.artifact_clear_cache()
 
     @StaticAnalysisSubCommand('static-analysis', 'print-checks',
                               'Print a list of the static analysis checks performed by default')