diff --git a/apps/cic-eth/tests/unit/ext/test_address.py b/apps/cic-eth/tests/unit/ext/test_address.py
new file mode 100644
index 00000000..ecfde959
--- /dev/null
+++ b/apps/cic-eth/tests/unit/ext/test_address.py
@@ -0,0 +1,50 @@
+# external imports
+from chainlib.eth.nonce import RPCNonceOracle
+from chainlib.eth.tx import (
+        receipt,
+        )
+from eth_address_declarator import AddressDeclarator
+from hexathon import add_0x
+
+# local imports
+from cic_eth.ext.address import translate_tx_addresses
+
+
+def test_translate(
+        default_chain_spec,
+        address_declarator,
+        eth_signer,
+        eth_rpc,
+        contract_roles,
+        agent_roles,
+        cic_registry,
+        init_celery_tasks,
+    ):
+
+    nonce_oracle = RPCNonceOracle(contract_roles['CONTRACT_DEPLOYER'], eth_rpc)
+
+    c = AddressDeclarator(signer=eth_signer, nonce_oracle=nonce_oracle, chain_id=default_chain_spec.chain_id())
+
+    description = 'alice'.encode('utf-8').ljust(32, b'\x00').hex()
+    (tx_hash_hex, o) = c.add_declaration(address_declarator, contract_roles['CONTRACT_DEPLOYER'], agent_roles['ALICE'], add_0x(description))
+    eth_rpc.do(o)
+    o = receipt(tx_hash_hex)
+    r = eth_rpc.do(o)
+    assert r['status'] == 1
+
+    description = 'bob'.encode('utf-8').ljust(32, b'\x00').hex()
+    (tx_hash_hex, o) = c.add_declaration(address_declarator, contract_roles['CONTRACT_DEPLOYER'], agent_roles['BOB'], add_0x(description))
+    eth_rpc.do(o)
+    o = receipt(tx_hash_hex)
+    r = eth_rpc.do(o)
+    assert r['status'] == 1
+
+    tx = {
+        'sender': agent_roles['ALICE'],
+        'sender_label': None,
+        'recipient': agent_roles['BOB'],
+        'recipient_label': None,
+            }
+    tx = translate_tx_addresses(tx, [contract_roles['CONTRACT_DEPLOYER']], default_chain_spec.asdict())
+    assert tx['sender_label'] == 'alice'
+    assert tx['recipient_label'] == 'bob'
diff --git a/apps/cic-eth/tests/unit/ext/test_ext_tx.py b/apps/cic-eth/tests/unit/ext/test_ext_tx.py
new file mode 100644
index 00000000..d942c4ac
--- /dev/null
+++ b/apps/cic-eth/tests/unit/ext/test_ext_tx.py
@@ -0,0 +1,96 @@
+# standard imports
+import logging
+
+# external imports
+import celery
+import moolb
+from chainlib.eth.tx import (
+        count,
+        receipt,
+        )
+from chainlib.eth.erc20 import ERC20
+from chainlib.eth.nonce import RPCNonceOracle
+
+# local imports
+from cic_eth.db.models.nonce import (
+        NonceReservation,
+        Nonce,
+        )
+
+logg = logging.getLogger()
+
+
+# TODO: This test fails when not run alone. Identify which fixture leaves a dirty state
+def test_filter_process(
+        init_database,
+        default_chain_spec,
+        init_eth_tester,
+        eth_rpc,
+        eth_signer,
+        agent_roles,
+        init_custodial,
+        cic_registry,
+        foo_token,
+        celery_session_worker,
+        ):
+
+    b = moolb.Bloom(1024, 3)
+    t = moolb.Bloom(1024, 3)
+
+    tx_hashes = []
+
+    # external tx
+    nonce_oracle = RPCNonceOracle(agent_roles['ALICE'], eth_rpc)
+
+    init_eth_tester.mine_blocks(13)
+    c = ERC20(signer=eth_signer, nonce_oracle=nonce_oracle)
+    (tx_hash_hex, o) = c.transfer(foo_token, agent_roles['ALICE'], agent_roles['BOB'], 1024)
+    eth_rpc.do(o)
+    o = receipt(tx_hash_hex)
+    r = eth_rpc.do(o)
+    a = r['block_number']
+    b.add(a.to_bytes(4, 'big'))
+    a = r['block_number'] + r['transaction_index']
+    t.add(a.to_bytes(4, 'big'))
+    tx_hashes.append(tx_hash_hex)
+
+    # external tx
+    init_eth_tester.mine_blocks(28)
+    c = ERC20(signer=eth_signer, nonce_oracle=nonce_oracle)
+    (tx_hash_hex, o) = c.transfer(foo_token, agent_roles['ALICE'], agent_roles['BOB'], 512)
+    eth_rpc.do(o)
+    o = receipt(tx_hash_hex)
+    r = eth_rpc.do(o)
+    a = r['block_number']
+    b.add(a.to_bytes(4, 'big'))
+    a = r['block_number'] + r['transaction_index']
+    t.add(a.to_bytes(4, 'big'))
+    tx_hashes.append(tx_hash_hex)
+
+    init_eth_tester.mine_blocks(10)
+        
+    o = {
+        'alg': 'sha256',
+        'filter_rounds': 3,
+        'low': 0,
+        'high': 50,
+        'block_filter': b.to_bytes().hex(),
+        'blocktx_filter': t.to_bytes().hex(),
+            }
+
+    s = celery.signature(
+            'cic_eth.ext.tx.list_tx_by_bloom',
+        [
+            o,
+            agent_roles['BOB'],
+            default_chain_spec.asdict(),
+            ],
+        queue=None
+        )
+    t = s.apply_async()
+    r = t.get() 
+
+    assert len(r) == 2
+    for tx_hash in r.keys():
+        tx_hashes.remove(tx_hash)
+    assert len(tx_hashes) == 0