diff --git a/tests/integration/test_ethereum_tester.py b/tests/integration/test_ethereum_tester.py
index b0789d38b9..e22c9e1b4a 100644
--- a/tests/integration/test_ethereum_tester.py
+++ b/tests/integration/test_ethereum_tester.py
@@ -568,16 +568,6 @@ def test_eth_send_transaction_no_gas(self, eth_tester, w3, unlocked_account):
     def test_eth_send_transaction_no_max_fee(self, eth_tester, w3, unlocked_account):
         super().test_eth_send_transaction_no_max_fee(w3, unlocked_account)
 
-    def test_eth_get_balance_with_block_identifier(self, w3: "Web3") -> None:
-        # in eth-tester we've changed 'mining' nomenclature to 'coinbase'
-        coinbase_address = w3.eth.get_block(1)["coinbase"]
-        genesis_balance = w3.eth.get_balance(coinbase_address, 0)
-        later_balance = w3.eth.get_balance(coinbase_address, 1)
-
-        assert is_integer(genesis_balance)
-        assert is_integer(later_balance)
-        assert later_balance > genesis_balance
-
     def test_eth_getBlockByNumber_safe(
         self, w3: "Web3", empty_block: BlockData
     ) -> None:
diff --git a/web3/providers/eth_tester/middleware.py b/web3/providers/eth_tester/middleware.py
index 28b5baec9f..c30c22c896 100644
--- a/web3/providers/eth_tester/middleware.py
+++ b/web3/providers/eth_tester/middleware.py
@@ -186,6 +186,10 @@ def is_hexstr(value: Any) -> bool:
     "extra_data": "extraData",
     "gas_used": "gasUsed",
     "base_fee_per_gas": "baseFeePerGas",
+    # eth-tester changed the miner key to coinbase since
+    # there is no longer any mining happening, but the current
+    # JSON-RPC spec still says miner
+    "coinbase": "miner",
 }
 block_result_remapper = apply_key_map(BLOCK_RESULT_KEY_MAPPING)