diff --git a/providers/fab/src/airflow/providers/fab/auth_manager/security_manager/override.py b/providers/fab/src/airflow/providers/fab/auth_manager/security_manager/override.py
index d4c3c2b367178..9753cde088c42 100644
--- a/providers/fab/src/airflow/providers/fab/auth_manager/security_manager/override.py
+++ b/providers/fab/src/airflow/providers/fab/auth_manager/security_manager/override.py
@@ -738,11 +738,6 @@ def auth_user_registration_role_jmespath(self) -> str:
     def auth_remote_user_env_var(self) -> str:
         return current_app.config["AUTH_REMOTE_USER_ENV_VAR"]
 
-    @property
-    def auth_username_ci(self):
-        """Get the auth username for CI."""
-        return current_app.config.get("AUTH_USERNAME_CI", True)
-
     @property
     def auth_user_registration(self):
         """Will user self registration be allowed."""
@@ -1435,12 +1430,6 @@ def find_user(self, username=None, email=None):
         """Find user by username or email."""
         if username:
             try:
-                if self.auth_username_ci:
-                    return self.session.scalars(
-                        select(self.user_model).where(
-                            func.lower(self.user_model.username) == func.lower(username)
-                        )
-                    ).one_or_none()
                 return self.session.scalars(
                     select(self.user_model).where(
                         func.lower(self.user_model.username) == func.lower(username)