--- a/testing/mozharness/mozharness/mozilla/secrets.py
+++ b/testing/mozharness/mozharness/mozilla/secrets.py
@@ -47,17 +47,17 @@ class SecretsMixin(object):
         is used, or no secret is written.
         """
         if self.config.get('forced_artifact_build'):
             self.info('Skipping due to forced artifact build.')
             return
 
         secret_files = self.config.get('secret_files', [])
 
-        scm_level = self.config.get('scm-level', 1)
+        scm_level = self.config.get('scm_level', 1)
         subst = {
             'scm-level': scm_level,
         }
 
         for sf in secret_files:
             filename = sf['filename']
             secret_name = sf['secret_name'] % subst
             min_scm_level = sf.get('min_scm_level', 0)