diff --git a/axes/checks.py b/axes/checks.py
index a318443..c8e0808 100644
--- a/axes/checks.py
+++ b/axes/checks.py
@@ -211,7 +211,7 @@ def axes_lockout_tiers_check(app_configs, **kwargs):  # pylint: disable=unused-a
     if tiers is None:
         return warnings
 
-    if not _is_valid_tiers_list(tiers):
+    if not is_valid_tiers_list(tiers):
         warnings.append(
             Warning(
                 msg=Messages.LOCKOUT_TIERS_INVALID,
@@ -233,7 +233,7 @@ def axes_lockout_tiers_check(app_configs, **kwargs):  # pylint: disable=unused-a
     return warnings
 
 
-def _is_valid_tiers_list(tiers) -> bool:
+def is_valid_tiers_list(tiers) -> bool:
     if not isinstance(tiers, (list, tuple)):
         return False
     return all(isinstance(t, LockoutTier) for t in tiers)
diff --git a/axes/helpers.py b/axes/helpers.py
index 377f9cd..74c8dba 100644
--- a/axes/helpers.py
+++ b/axes/helpers.py
@@ -66,7 +66,7 @@ def get_cool_off(request: Optional[HttpRequest] = None) -> Optional[timedelta]:
     :exception TypeError: if settings.AXES_COOLOFF_TIME is of wrong type.
     """
 
-    tier = _resolve_tier_from_request(request)
+    tier = resolve_tier_from_request(request)
     if tier is not None:
         return tier.cooloff
 
@@ -121,7 +121,7 @@ def get_lockout_tier(failures: int) -> Optional[LockoutTier]:
     return matched
 
 
-def _resolve_tier_from_request(
+def resolve_tier_from_request(
     request: Optional[HttpRequest],
 ) -> Optional[LockoutTier]:
     """Extract failure count from *request* and resolve the tier."""