Add flaky geth dev mining to receipt unmined tests

Author: fselmo

web3/_utils/module_testing/eth_module.py

@@ -1692,6 +1692,7 @@ async def test_async_eth_get_transaction_receipt_mined(
         assert isinstance(effective_gas_price, int)
         assert effective_gas_price > 0
 
+    @flaky_geth_dev_mining
     @pytest.mark.asyncio
     async def test_async_eth_get_transaction_receipt_unmined(
         self,
@@ -3596,7 +3597,6 @@ def test_eth_replace_transaction_gas_price_defaulting_strategy_lower(
         self, w3: "Web3", keyfile_account_address: ChecksumAddress
     ) -> None:
         gas_price = w3.to_wei(2, "gwei")
-
         txn_params: TxParams = {
             "from": keyfile_account_address,
             "to": keyfile_account_address,
@@ -4360,6 +4360,7 @@ def test_eth_get_transaction_receipt_mined(
         assert isinstance(effective_gas_price, int)
         assert effective_gas_price > 0
 
+    @flaky_geth_dev_mining
     def test_eth_get_transaction_receipt_unmined(
         self, w3: "Web3", keyfile_account_address_dual_type: ChecksumAddress
     ) -> None: