diff --git a/.gitignore b/.gitignore
index 28fbdb6..ee6e50c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,4 @@ build/
 gmon.out
 *.egg-info
 .venv/
+.idea
\ No newline at end of file
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index a014d07..d8c7e89 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,7 +1,9 @@
 stages:
   - test
+  - run-coverage
   - slither-analyzer
 
+
 variables:
   PIP_CACHE_DIR: "$CI_PROJECT_DIR/.cache/pip"
 
@@ -35,8 +37,31 @@ test:
       # run tests
       - bash run_tests.sh
 
-slither-analize:
+run-coverage:
+  stage: test
+  image: registry.gitlab.com/grassrootseconomics/cic-base-images/ci-solc-python:latest
+  script:
+    - cd python 
+    - export PYTHONPATH=.
+    - pip install --extra-index-url https://pip.grassrootseconomics.net 
+        --extra-index-url https://gitlab.com/api/v4/projects/27624814/packages/pypi/simple 
+        -r requirements.txt -r test_requirements.txt 
+    -  pip install pytest pytest-cov
+    - coverage run -m pytest
+    - coverage html
+    - coverage report --fail-under=90
+    
+  coverage: '/^TOTAL.+?(\d+\%)$/'
+  artifacts:
+    reports:
+      cobertura: python/htmlcov/index.html
+
+slither-analyzer:
   image: registry.gitlab.com/grassrootseconomics/cic-base-images/ci-solc-python:latest
   allow_failure: true
   script: 
-    - slither solidity/
+    - cd solidity
+    - slither GiftableToken.sol
+    - slither GiftableToken.sol --print human-summary
+
+
diff --git a/python/.coverage b/python/.coverage
new file mode 100644
index 0000000..51af88f
Binary files /dev/null and b/python/.coverage differ
diff --git a/python/.coveragerc b/python/.coveragerc
new file mode 100644
index 0000000..1951f90
--- /dev/null
+++ b/python/.coveragerc
@@ -0,0 +1,7 @@
+[run]
+branch = True
+[report]
+omit = .venv/*
+        **/runnable/*.py
+[html]
+
diff --git a/python/giftable_erc20_token/factory.py b/python/giftable_erc20_token/factory.py
index 3031e5a..54ac868 100644
--- a/python/giftable_erc20_token/factory.py
+++ b/python/giftable_erc20_token/factory.py
@@ -94,4 +94,4 @@ class GiftableToken(TxFactory):
         tx = self.template(sender_address, contract_address, use_nonce=True)
         tx = self.set_code(tx, data)
         tx = self.finalize(tx, tx_format)
-        return tx
+        return tx
\ No newline at end of file
diff --git a/python/tests/test_erc20_interface.py b/python/tests/test_erc20_interface.py
index 4c586d1..d500bfb 100644
--- a/python/tests/test_erc20_interface.py
+++ b/python/tests/test_erc20_interface.py
@@ -12,6 +12,7 @@ from chainlib.eth.tx import (
         receipt,
         )
 from chainlib.eth.address import to_checksum_address
+from hexathon import strip_0x
 
 # local imports
 from giftable_erc20_token import GiftableToken
@@ -102,7 +103,7 @@ class TestToken(EthTesterCase):
         o = transaction(tx_hash)
         r = self.rpc.do(o)
         data = c.parse_transfer_request(r['data'])
-        self.assertEqual(data[0], self.accounts[1])
+        self.assertEqual(data[0], strip_0x(self.accounts[1]))
         self.assertEqual(data[1], 1000)
 
 
@@ -124,7 +125,7 @@ class TestToken(EthTesterCase):
         o = transaction(tx_hash)
         r = self.rpc.do(o)
         data = c.parse_approve_request(r['data'])
-        self.assertEqual(data[0], self.accounts[1])
+        self.assertEqual(data[0], strip_0x(self.accounts[1]))
         self.assertEqual(data[1], 1000)
 
         nonce_oracle = RPCNonceOracle(self.accounts[1], conn=self.conn)
@@ -138,8 +139,8 @@ class TestToken(EthTesterCase):
         o = transaction(tx_hash)
         r = self.rpc.do(o)
         data = c.parse_transfer_from_request(r['data'])
-        self.assertEqual(data[0], self.accounts[0])
-        self.assertEqual(data[1], self.accounts[2])
+        self.assertEqual(data[0], strip_0x(self.accounts[0]))
+        self.assertEqual(data[1], strip_0x(self.accounts[2]))
         self.assertEqual(data[2], 1001)
 
         (tx_hash, o) = c.transfer_from(self.address, self.accounts[1], self.accounts[0], self.accounts[2], 1000)
diff --git a/solidity/GiftableToken.sol b/solidity/GiftableToken.sol
index 24bcb59..49ba75b 100644
--- a/solidity/GiftableToken.sol
+++ b/solidity/GiftableToken.sol
@@ -1,4 +1,4 @@
-pragma solidity >0.6.11;
+pragma solidity >=0.6.11;
 
 // SPDX-License-Identifier: GPL-3.0-or-later
 // File-Version: 2