diff --git a/ironic/common/policy.py b/ironic/common/policy.py
index 1f5d9050c8..2e493e9af0 100644
--- a/ironic/common/policy.py
+++ b/ironic/common/policy.py
@@ -1797,6 +1797,13 @@ def init_enforcer(policy_file=None, rules=None,
         rules=rules,
         default_rule=default_rule,
         use_conf=use_conf)
+    # NOTE(melwitt): Explictly disable the warnings for policies
+    # changing their default check_str. During policy-defaults-refresh
+    # work, all the policy defaults have been changed and warning for
+    # each policy started filling the logs limit for various tool.
+    # Once we move to new defaults only world then we can enable these
+    # warning again.
+    _ENFORCER.suppress_default_change_warnings = True
     _ENFORCER.register_defaults(list_policies())
 
 
diff --git a/ironic/tests/unit/policy_fixture.py b/ironic/tests/unit/policy_fixture.py
index 4e07c25542..973c1e75ee 100644
--- a/ironic/tests/unit/policy_fixture.py
+++ b/ironic/tests/unit/policy_fixture.py
@@ -44,3 +44,7 @@ class PolicyFixture(fixtures.Fixture):
         CONF.set_override('policy_file', self.policy_file_name, 'oslo_policy')
         ironic_policy._ENFORCER = None
         self.addCleanup(ironic_policy.get_enforcer().clear)
+        # NOTE(melwitt): Logging all the deprecation warning for every unit
+        # test will overflow the log files. Suppress the deprecation warnings
+        # for tests.
+        ironic_policy._ENFORCER.suppress_deprecation_warnings = True