diff --git a/jmclient/jmclient/blockchaininterface.py b/jmclient/jmclient/blockchaininterface.py
index bc0ccdb..67b8648 100644
--- a/jmclient/jmclient/blockchaininterface.py
+++ b/jmclient/jmclient/blockchaininterface.py
@@ -1,16 +1,10 @@
 from __future__ import print_function
 
-import BaseHTTPServer
 import abc
 import ast
-import json
-import os
-import pprint
 import random
-import re
 import sys
 import time
-import traceback
 import binascii
 from decimal import Decimal
 from twisted.internet import reactor, task
@@ -19,7 +13,7 @@ import btc
 
 from jmclient.jsonrpc import JsonRpcConnectionError, JsonRpcError
 from jmclient.configure import get_p2pk_vbyte, jm_single
-from jmbase.support import get_log, chunks
+from jmbase.support import get_log
 
 log = get_log()
 
@@ -425,9 +419,6 @@ class BitcoinCoreInterface(BlockchainInterface):
         Bitcoin Core instance, in which case "fast" should have been
         specifically disabled by the user.
         """
-        from jmclient.wallet import BitcoinCoreWallet
-        if isinstance(wallet, BitcoinCoreWallet):
-            return
         wallet_name = self.get_wallet_name(wallet)
         agd = self.rpc('listaddressgroupings', [])
         #flatten all groups into a single list; then, remove duplicates
@@ -516,10 +507,6 @@ class BitcoinCoreInterface(BlockchainInterface):
 
 
     def sync_addresses(self, wallet, restart_cb=None):
-        from jmclient.wallet import BitcoinCoreWallet
-
-        if isinstance(wallet, BitcoinCoreWallet):
-            return
         log.debug('requesting detailed wallet history')
         wallet_name = self.get_wallet_name(wallet)
         #TODO It is worth considering making this user configurable:
@@ -653,10 +640,6 @@ class BitcoinCoreInterface(BlockchainInterface):
         self.unspent_monitoring_loop.stop()
 
     def sync_unspent(self, wallet):
-        from jmclient.wallet import BitcoinCoreWallet
-
-        if isinstance(wallet, BitcoinCoreWallet):
-            return
         st = time.time()
         wallet_name = self.get_wallet_name(wallet)
         wallet.unspent = {}
diff --git a/jmclient/test/test_wallets.py b/jmclient/test/test_wallets.py
index 98d944a..d16147e 100644
--- a/jmclient/test/test_wallets.py
+++ b/jmclient/test/test_wallets.py
@@ -23,7 +23,7 @@ from jmclient import (load_program_config, jm_single, sync_wallet,
                       AbstractWallet, get_p2pk_vbyte, get_log, Wallet, select,
                       select_gradual, select_greedy, select_greediest,
                       estimate_tx_fee, encryptData, get_network, WalletError,
-                      BitcoinCoreWallet, BitcoinCoreInterface, SegwitWallet,
+                      BitcoinCoreInterface, SegwitWallet,
                       wallet_generate_recover_bip39, decryptData, encryptData)
 from jmbase.support import chunks
 from taker_test_data import t_obtained_tx, t_raw_signed_tx
@@ -265,19 +265,6 @@ def test_index_ahead_cache(setup_wallets):
     assert is_index_ahead_of_cache(wallet, 3, 1)
 
 
-def test_core_wallet_no_sync(setup_wallets):
-    """Ensure BitcoinCoreWallet sync attempt does nothing
-    """
-    wallet = BitcoinCoreWallet("")
-    #this will not trigger sync due to absence of non-zero index_cache, usually.
-    wallet.index_cache = [[1, 1]]
-    jm_single().bc_interface.wallet_synced = False
-    jm_single().bc_interface.sync_wallet(wallet, fast=True)
-    assert not jm_single().bc_interface.wallet_synced
-    jm_single().bc_interface.sync_wallet(wallet)
-    assert not jm_single().bc_interface.wallet_synced
-
-
 def test_wrong_network_bci(setup_wallets):
     rpc = jm_single().bc_interface.jsonRpc
     with pytest.raises(Exception) as e_info: