diff --git a/apps/cli/README.md b/apps/cli/README.md
index 1f1f023..1926f01 100644
--- a/apps/cli/README.md
+++ b/apps/cli/README.md
@@ -145,3 +145,14 @@ or
 ## the Eye of Satoshi's API	
 
 If you wish to read about the underlying API, and how to write your own tool to interact with it, refer to [tEOS-API.md](tEOS-API.md).
+
+## Are you reckless? Try me on mainnet
+Would you like to try me on `mainnet` instead of `testnet`? Add `-s https://mainnet.teos.pisa.watch` to your calls, for example:
+
+```
+python wt_cli.py -s https://teosmainnet.pisa.watch add_appointment -f dummy_appointment_data.json 
+```
+
+You can also change the config file to avoid specifying the server every time:
+
+`DEFAULT_PISA_API_SERVER = "https://teosmainnet.pisa.watch"`
\ No newline at end of file
diff --git a/apps/cli/requirements-dev.txt b/apps/cli/requirements-dev.txt
index 3b5f741..f8c47f0 100644
--- a/apps/cli/requirements-dev.txt
+++ b/apps/cli/requirements-dev.txt
@@ -1 +1,3 @@
-responses
\ No newline at end of file
+responses
+pytest
+black
\ No newline at end of file
diff --git a/test/common/unit/test_tools.py b/test/common/unit/test_tools.py
index 8b613ae..eb303c1 100644
--- a/test/common/unit/test_tools.py
+++ b/test/common/unit/test_tools.py
@@ -3,6 +3,7 @@ import pytest
 import logging
 from copy import deepcopy
 
+# FIXME: Import from pisa. Common should not import anything from cli nor pisa.
 from pisa import conf_fields
 
 from common.constants import LOCATOR_LEN_BYTES