diff --git a/tests/contracts/test_contract_estimateGas.py b/tests/contracts/test_contract_estimateGas.py
index 365c26f..8ffd901 100644
--- a/tests/contracts/test_contract_estimateGas.py
+++ b/tests/contracts/test_contract_estimateGas.py
@@ -36,7 +36,7 @@ def test_contract_estimateGas(web3, math_contract):
     gas_estimate = math_contract.estimateGas().increment()
 
     try:
-        assert abs(gas_estimate - 21272) < 200  # Geth
+        assert abs(gas_estimate - 21472) < 200  # Geth
     except AssertionError:
-        assert abs(gas_estimate - 42820) < 200  # TestRPC
+        assert abs(gas_estimate - 43020) < 200  # TestRPC
         pass
diff --git a/tests/eth-module/test_eth_estimateGas.py b/tests/eth-module/test_eth_estimateGas.py
index 18c8faf..992236f 100644
--- a/tests/eth-module/test_eth_estimateGas.py
+++ b/tests/eth-module/test_eth_estimateGas.py
@@ -40,7 +40,7 @@ def test_eth_estimateGas(web3, math_contract):
     })
 
     try:
-        assert abs(gas_estimate - 21272) < 200  # Geth
+        assert abs(gas_estimate - 21472) < 200  # Geth
     except AssertionError:
-        assert abs(gas_estimate - 42820) < 200  # TestRPC
+        assert abs(gas_estimate - 43020) < 200  # TestRPC
         pass
diff --git a/web3/providers/tester.py b/web3/providers/tester.py
index a5b3149..c47c866 100644
--- a/web3/providers/tester.py
+++ b/web3/providers/tester.py
@@ -2,8 +2,6 @@ import logging
 
 import gevent
 
-from testrpc.rpc import RPCMethods
-
 from .base import BaseProvider  # noqa: E402
 from .rpc import RPCProvider  # noqa: E402
 
@@ -23,7 +21,8 @@ class EthereumTesterProvider(BaseProvider):
     def __init__(self,
                  *args,
                  **kwargs):
-        """Create a new RPC client.
+        """
+        Create a new RPC client.
 
         :param connection_timeout: See :class:`geventhttpclient.HTTPClient`
 
@@ -31,6 +30,8 @@ class EthereumTesterProvider(BaseProvider):
         """
         if not is_testrpc_available():
             raise Exception("`TestRPCProvider` requires the `eth-testrpc` package to be installed")
+        from testrpc.rpc import RPCMethods
+
         self.rpc_methods = RPCMethods()
         super(BaseProvider, self).__init__(*args, **kwargs)
 
diff --git a/web3/utils/exception_py2.py b/web3/utils/exception_py2.py
index e554a01..e0a5cda 100644
--- a/web3/utils/exception_py2.py
+++ b/web3/utils/exception_py2.py
@@ -1,4 +1,5 @@
 import sys
 
+
 def raise_from(my_exception, other_exception):
     raise my_exception, None, sys.exc_info()[2]  # noqa: W602, E999