diff --git a/Understanding-and-debugging-Nimbus-EVM-JSON-tests.md b/Understanding-and-debugging-Nimbus-EVM-JSON-tests.md
index ed3682a..b2956e4 100644
--- a/Understanding-and-debugging-Nimbus-EVM-JSON-tests.md
+++ b/Understanding-and-debugging-Nimbus-EVM-JSON-tests.md
@@ -175,7 +175,7 @@ Some terminals don't support colour output and in this case you will see lots of
 ### py-evm
 
 ```
-pytest -s -k fixtures/GeneralStateTests/stAttackTest/ContractCreationSpam.json tests/json-fixtures/test_state.py --fork Homestead
+pytest -v --log-level=DEBUG -k fixtures/GeneralStateTests/stAttackTest/ContractCreationSpam.json tests/json-fixtures/test_state.py --fork Homestead
 ```
 Installation hints:
 - use a virtualenv