diff --git a/electrum/commands.py b/electrum/commands.py
index 325bd5ca1..55f5f4ce8 100644
--- a/electrum/commands.py
+++ b/electrum/commands.py
@@ -1079,9 +1079,9 @@ class Commands:
 
     @command('n')
     async def inject_fees(self, fees):
-        import ast
-        self.network.config.fee_estimates = ast.literal_eval(fees)
-        self.network.notify('fee')
+        # e.g. use from Qt console:  inject_fees("{25: 1009, 10: 15962, 5: 18183, 2: 23239}")
+        fee_est = ast.literal_eval(fees)
+        self.network.update_fee_estimates(fee_est=fee_est)
 
     @command('wn')
     async def enable_htlc_settle(self, b: bool, wallet: Abstract_Wallet = None):
diff --git a/electrum/network.py b/electrum/network.py
index a48bbcd3a..a72f4d013 100644
--- a/electrum/network.py
+++ b/electrum/network.py
@@ -534,13 +534,14 @@ class Network(Logger, NetworkRetryManager[ServerAddr]):
                 return {}
             return self.interface.fee_estimates_eta
 
-    def update_fee_estimates(self):
-        e = self.get_fee_estimates()
-        for nblock_target, fee in e.items():
+    def update_fee_estimates(self, *, fee_est: Dict = None):
+        if fee_est is None:
+            fee_est = self.get_fee_estimates()
+        for nblock_target, fee in fee_est.items():
             self.config.update_fee_estimates(nblock_target, fee)
-        if not hasattr(self, "_prev_fee_est") or self._prev_fee_est != e:
-            self._prev_fee_est = copy.copy(e)
-            self.logger.info(f'fee_estimates {e}')
+        if not hasattr(self, "_prev_fee_est") or self._prev_fee_est != fee_est:
+            self._prev_fee_est = copy.copy(fee_est)
+            self.logger.info(f'fee_estimates {fee_est}')
         self.notify('fee')
 
     @with_recent_servers_lock