diff --git a/.circleci/config.yml b/.circleci/config.yml
index 2a67e6f..e0e3b58 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -18,21 +18,15 @@ jobs:
     steps:
       - checkout
 
-      # Get bitcoin_sandbox
-      - run:
-          name: Get bitcoin_sandbox
-          command: git clone --single-branch --branch ln https://github.com/sr-gi/bitcoin_sandbox.git
-
       # Download and cache dependencies
       - restore_cache:
           keys:
-            - v2-dependencies-{{ checksum "pisa/requirements.txt" }}-{{ checksum "pisa/requirements-dev.txt" }}-{{ checksum "apps/cli/requirements-dev.txt" }}-{{ checksum "bitcoin_sandbox/requirements.txt" }}
-            # fallback to using the latest cache if no exact match is found
-            - v2-dependencies-
+            - v1-dependencies-{{ checksum "pisa/requirements.txt" }}-{{ checksum "pisa/requirements-dev.txt" }}-{{ checksum "apps/cli/requirements-dev.txt" }}-{{ checksum "test/pisa/e2e/bitcoind_snap.sh" }}
 
       - run:
           name: Install dependencies
           command: |
+            sudo snap install `cat test/pisa/e2e/bitcoind_snap.sh`
             pyenv local 3.7.0
             python3 -m venv venv
             . venv/bin/activate
@@ -40,23 +34,12 @@ jobs:
             pip install -r pisa/requirements.txt
             pip install -r pisa/requirements-dev.txt
             pip install -r apps/cli/requirements-dev.txt
-            pip install -r bitcoin_sandbox/requirements.txt
 
       - save_cache:
           paths:
             - ./venv
-          key: v2-dependencies-{{ checksum "pisa/requirements.txt" }}-{{ checksum "pisa/requirements-dev.txt" }}-{{ checksum "apps/cli/requirements-dev.txt" }}-{{ checksum "bitcoin_sandbox/requirements.txt" }}
-
-      # Build docker env for E2E testing
-      - run:
-          name: Build bitcoin_sandbox
-          command: |
-            cp test/pisa/e2e/bitcoin.conf bitcoin_sandbox/
-            cp test/pisa/e2e/sandbox-conf.py bitcoin_sandbox/bitcoin_sandbox/conf.py
-            cp bitcoin_sandbox/docker/Dockerfile_ubuntu_no_ln bitcoin_sandbox/Dockerfile
-            . venv/bin/activate
-            cd bitcoin_sandbox && python -m bitcoin_sandbox.run_scenarios
-
+            - /snap
+          key: v1-dependencies-{{ checksum "pisa/requirements.txt" }}-{{ checksum "pisa/requirements-dev.txt" }}-{{ checksum "apps/cli/requirements-dev.txt" }}-{{ checksum "test/pisa/e2e/bitcoind_snap.sh" }}
 
       # Run unit tests
       - run:
@@ -83,6 +66,14 @@ jobs:
             . venv/bin/activate
             pytest test/apps/cli/unit
 
+      # Run bitcoind for E2E testing
+      - run:
+          name: Run bitcoind
+          command: |
+            mkdir -p /home/circleci/snap/bitcoin-core/common/.bitcoin/
+            cp test/pisa/e2e/bitcoin.conf /home/circleci/snap/bitcoin-core/common/.bitcoin/
+            /snap/bin/bitcoin-core.daemon
+
       # Setup pisa for E2E testing
       - run:
           name: Setup pisa
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
diff --git a/test/pisa/e2e/bitcoin.conf b/test/pisa/e2e/bitcoin.conf
index 92c9105..e11a3ed 100644
--- a/test/pisa/e2e/bitcoin.conf
+++ b/test/pisa/e2e/bitcoin.conf
@@ -2,6 +2,7 @@
 dnsseed=0
 
 # [debug]
+daemon=1
 regtest=1
 debug=1
 logips=1
diff --git a/test/pisa/e2e/bitcoind_snap.sh b/test/pisa/e2e/bitcoind_snap.sh
new file mode 100644
index 0000000..78915c2
--- /dev/null
+++ b/test/pisa/e2e/bitcoind_snap.sh
@@ -0,0 +1 @@
+bitcoin-core --channel=0.19/stable
\ No newline at end of file
diff --git a/test/pisa/e2e/pisa-conf.py b/test/pisa/e2e/pisa-conf.py
index f53a81b..3c219c1 100644
--- a/test/pisa/e2e/pisa-conf.py
+++ b/test/pisa/e2e/pisa-conf.py
@@ -2,13 +2,13 @@
 BTC_RPC_USER = "user"
 BTC_RPC_PASSWD = "passwd"
 BTC_RPC_HOST = "localhost"
-BTC_RPC_PORT = 18445
+BTC_RPC_PORT = 18443
 BTC_NETWORK = "regtest"
 
 # ZMQ
 FEED_PROTOCOL = "tcp"
 FEED_ADDR = "127.0.0.1"
-FEED_PORT = 28335
+FEED_PORT = 28332
 
 # PISA
 DATA_FOLDER = "~/.pisa_btc/"
diff --git a/test/pisa/e2e/sandbox-conf.py b/test/pisa/e2e/sandbox-conf.py
deleted file mode 100644
index cbdd3d0..0000000
--- a/test/pisa/e2e/sandbox-conf.py
+++ /dev/null
@@ -1,19 +0,0 @@
-# Copy this file with your own configuration and save it as conf.py
-
-# Docker
-DOCK_NETWORK_NAME = "pisa_net"
-DOCK_NETWORK_SUBNET = "172.16.0.0/16"
-DOCK_NETWORK_GW = "172.16.0.1"
-DOCK_CONTAINER_NAME_PREFIX = "btc_n"
-DOCK_IMAGE_NAME = "sandbox_btc"
-DOCKER_INI_PORT_MAPPING = 22000
-DOCKER_RPC_PORT_MAPPING = 18444
-DOCKER_ZMQ_BLOCK_PORT_MAPPING = 28334
-
-# Log
-LOG_FILE = "bitcoin_sandbox.log"
-
-# Graphs
-BITCOIN_GRAPH_FILE = "./graphs/basic3.graphml"
-LN_GRAPH_FILE = "./graphs/basic3_ln.graphml"
-DEFAULT_LN_GRAPH_WEIGHT = 10000