diff --git a/python/eth_writer/unittest/__init__.py b/python/eth_writer/unittest/__init__.py
index 23027db..fe4c35d 100644
--- a/python/eth_writer/unittest/__init__.py
+++ b/python/eth_writer/unittest/__init__.py
@@ -1 +1 @@
-from .base import TestEthWriterInterface
+from .interface import TestEthWriterInterface
diff --git a/python/eth_writer/unittest/base.py b/python/eth_writer/unittest/base.py
index 1015211..921b5a2 100644
--- a/python/eth_writer/unittest/base.py
+++ b/python/eth_writer/unittest/base.py
@@ -1,45 +1,58 @@
+# standard imports
+import os
+import logging
+
 # external imports
 from chainlib.eth.unittest.ethtester import EthTesterCase
 from chainlib.connection import RPCConnection
 from chainlib.eth.nonce import RPCNonceOracle
 from chainlib.eth.tx import receipt
+from chainlib.eth.tx import TxFactory
+from chainlib.eth.tx import TxFormat
+from chainlib.eth.contract import ABIContractEncoder
+from chainlib.eth.contract import ABIContractType
 
 # local imports
 from eth_writer import EthWriter
 
+script_dir = os.path.dirname(os.path.realpath(__file__))
+contract_dir = os.path.join(script_dir, '..', '..', 'solidity')
 
-class TestEthWriterInterface:
+logg = logging.getLogger(__name__)
 
-    def test_add_delete(self):
-        writer_contract_address = self.contracts['writer']
-        publisher_address = self.roles.get('publisher')
-        writer_account = self.roles['writer']
 
-        nonce_oracle = RPCNonceOracle(self.publisher, conn=self.conn)
+class TestEthWriter(EthTesterCase):
+
+    def setUp(self):
+        super(TestEthWriter, self).setUp()
+
+        self.set_method = None
+
+        self.conn = RPCConnection.connect(self.chain_spec, 'default')
+        nonce_oracle = RPCNonceOracle(self.accounts[0], self.conn)
+
+        f = open(os.path.join(contract_dir, 'WriterTest.bin'))
+        code = f.read()
+        f.close()
+
+        txf = TxFactory(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
+        tx = txf.template(self.accounts[0], None, use_nonce=True)
+        tx = txf.set_code(tx, code)
+        (tx_hash_hex, o) = txf.build(tx)
+        self.conn.do(o)
+        o = receipt(tx_hash_hex)
+        r = self.conn.do(o)
+        self.assertEqual(r['status'], 1)
+        self.address = r['contract_address']
+        self.contracts['writer'] = self.address
+        self.roles['publisher'] = self.accounts[0]
+        self.roles['writer'] = self.accounts[1]
+        logg.debug('published writer test contract with hash {}'.format(r))
+
         c = EthWriter(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
-
-        o = c.is_writer(writer_contract_address, publisher_address, sender_address=publisher_address)
-        r = self.rpc.do(o)
-        self.assertEqual(int(r, 16), 1)
-
-        self.alice = self.accounts[1]
-        (tx_hash, o) = c.add_writer(writer_contract_address, publisher_address, writer_account)
+        (tx_hash, o) = c.add_writer(self.address, self.accounts[0], self.accounts[0])
         self.rpc.do(o)
         o = receipt(tx_hash)
         r = self.rpc.do(o)
         self.assertEqual(r['status'], 1)
 
-        o = c.is_writer(writer_contract_address, writer_account, sender_address=publisher_address)
-        r = self.rpc.do(o)
-        self.assertEqual(int(r, 16), 1)
-
-        self.alice = self.accounts[1]
-        (tx_hash, o) = c.delete_writer(writer_contract_address, publisher_address, writer_account)
-        self.rpc.do(o)
-        o = receipt(tx_hash)
-        r = self.rpc.do(o)
-        self.assertEqual(r['status'], 1)
-
-        o = c.is_writer(writer_contract_address, self.alice, sender_address=publisher_address)
-        r = self.rpc.do(o)
-        self.assertEqual(int(r, 16), 0)
diff --git a/python/eth_writer/unittest/interface.py b/python/eth_writer/unittest/interface.py
new file mode 100644
index 0000000..1015211
--- /dev/null
+++ b/python/eth_writer/unittest/interface.py
@@ -0,0 +1,45 @@
+# external imports
+from chainlib.eth.unittest.ethtester import EthTesterCase
+from chainlib.connection import RPCConnection
+from chainlib.eth.nonce import RPCNonceOracle
+from chainlib.eth.tx import receipt
+
+# local imports
+from eth_writer import EthWriter
+
+
+class TestEthWriterInterface:
+
+    def test_add_delete(self):
+        writer_contract_address = self.contracts['writer']
+        publisher_address = self.roles.get('publisher')
+        writer_account = self.roles['writer']
+
+        nonce_oracle = RPCNonceOracle(self.publisher, conn=self.conn)
+        c = EthWriter(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
+
+        o = c.is_writer(writer_contract_address, publisher_address, sender_address=publisher_address)
+        r = self.rpc.do(o)
+        self.assertEqual(int(r, 16), 1)
+
+        self.alice = self.accounts[1]
+        (tx_hash, o) = c.add_writer(writer_contract_address, publisher_address, writer_account)
+        self.rpc.do(o)
+        o = receipt(tx_hash)
+        r = self.rpc.do(o)
+        self.assertEqual(r['status'], 1)
+
+        o = c.is_writer(writer_contract_address, writer_account, sender_address=publisher_address)
+        r = self.rpc.do(o)
+        self.assertEqual(int(r, 16), 1)
+
+        self.alice = self.accounts[1]
+        (tx_hash, o) = c.delete_writer(writer_contract_address, publisher_address, writer_account)
+        self.rpc.do(o)
+        o = receipt(tx_hash)
+        r = self.rpc.do(o)
+        self.assertEqual(r['status'], 1)
+
+        o = c.is_writer(writer_contract_address, self.alice, sender_address=publisher_address)
+        r = self.rpc.do(o)
+        self.assertEqual(int(r, 16), 0)
diff --git a/python/solidity/WriterTest.bin b/python/solidity/WriterTest.bin
new file mode 100644
index 0000000..42e63a5
--- /dev/null
+++ b/python/solidity/WriterTest.bin
@@ -0,0 +1 @@
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
\ No newline at end of file
diff --git a/python/solidity/WriterTest.sol b/python/solidity/WriterTest.sol
new file mode 100644
index 0000000..346258e
--- /dev/null
+++ b/python/solidity/WriterTest.sol
@@ -0,0 +1,33 @@
+pragma solidity >=0.6.3;
+
+// Author:	Louis Holbrook <dev@holbrook.no> 0826EDA1702D1E87C6E2875121D2E7BB88C2A746
+// SPDX-License-Identifier:	AGPL-3.0-or-later
+
+contract MinterTest {
+	mapping (address => bool ) public isWriter;
+
+	event WriterAdded(address _writer);
+	event WriterDeleted(address _writer);
+
+	function addWriter(address _writer) public returns (bool) {
+		isWriter[_writer] = true;
+		emit WriterAdded(_writer);
+		return true;
+	}
+
+	function deleteWriter(address _writer) public returns (bool) {
+		isWriter[_writer] = false;
+		emit WriterDeleted(_writer);
+		return true;
+	}
+
+	function supportsInterface(bytes4 _sum) public pure returns (bool) {
+		if (_sum == 0x01ffc9a7) { // EIP165
+			return true;
+		}
+		if (_sum == 0xabe1f1f5) { // Writer
+			return true;
+		}
+		return false;
+	}
+}
diff --git a/python/tests/test_writer.py b/python/tests/test_writer.py
new file mode 100644
index 0000000..648e8d8
--- /dev/null
+++ b/python/tests/test_writer.py
@@ -0,0 +1,29 @@
+# standard imports
+import unittest
+import logging
+import os
+from chainlib.eth.nonce import RPCNonceOracle
+from chainlib.eth.tx import receipt
+from eth_erc20 import ERC20
+from giftable_erc20_token import GiftableToken
+from eth_interface.unittest import TestERC165
+
+# local imports
+from eth_writer import EthWriter
+from eth_writer.unittest import TestEthWriterInterface
+from eth_writer.unittest.base import TestEthWriter
+
+
+logging.basicConfig(level=logging.DEBUG)
+logg = logging.getLogger()
+
+
+class TestWriterBase(TestEthWriter, TestEthWriterInterface, TestERC165):
+
+    def setUp(self):
+        super(TestWriterBase, self).setUp()
+        self.add_interface_check('abe1f1f5')
+
+
+if __name__ == '__main__':
+    unittest.main()