diff --git a/solidity/test.py b/solidity/test.py
new file mode 100644
index 0000000..09945ce
--- /dev/null
+++ b/solidity/test.py
@@ -0,0 +1,49 @@
+import web3
+import eth_tester
+import json
+
+
+eth_params = eth_tester.backends.pyevm.main.get_default_genesis_params({
+    'gas_limit': 9000000,
+    })
+backend = eth_tester.PyEVMBackend(eth_params)
+instance = eth_tester.EthereumTester(backend)
+provider = web3.Web3.EthereumTesterProvider(instance)
+w3 = web3.Web3(provider)
+
+
+f = open('registry.bin', 'r')
+bytecode = f.read()
+f.close()
+
+f = open('registry.abi.json', 'r')
+abi = json.load(f)
+f.close()
+
+c = w3.eth.contract(abi=abi, bytecode=bytecode)
+tx_hash = c.constructor().transact({'from': w3.eth.accounts[0]})
+
+r = w3.eth.getTransactionReceipt(tx_hash)
+
+c = w3.eth.contract(abi=abi, address=r.contractAddress)
+fail = False
+try:
+    c.functions.add(w3.eth.accounts[2]).transact({'from': w3.eth.accounts[1]})
+except:
+    fail = True
+assert fail
+
+c.functions.addWriter(w3.eth.accounts[1]).transact({'from': w3.eth.accounts[0]})
+c.functions.add(w3.eth.accounts[2]).transact({'from': w3.eth.accounts[1]})
+c.functions.add(w3.eth.accounts[3]).transact({'from': w3.eth.accounts[1]})
+
+assert c.functions.count().call() == 3
+assert c.functions.accountsIndex(w3.eth.accounts[3]).call() == 2
+assert c.functions.accounts(2).call() == w3.eth.accounts[3]
+
+fail = False
+try:
+    c.functions.add(w3.eth.accounts[3]).transact({'from': w3.eth.accounts[1]})
+except:
+    fail = True
+assert fail