diff --git a/docs/contributing.rst b/docs/contributing.rst
index e634d8761..07583d8e0 100644
--- a/docs/contributing.rst
+++ b/docs/contributing.rst
@@ -127,7 +127,6 @@ Boulder:
 
 .. code-block:: shell
 
-   export SERVER=http://10.77.77.77:4000/directory
    source tests/integration/_common.sh
 
 Run the integration tests using:
diff --git a/tests/integration/_common.sh b/tests/integration/_common.sh
index b9281940c..cc04bd6b3 100755
--- a/tests/integration/_common.sh
+++ b/tests/integration/_common.sh
@@ -16,9 +16,11 @@ certbot_test () {
         "$@"
 }
 
+export BOULDER_IP=${BOULDER_IP:10.77.77.77}
+export SERVER=${SERVER:-http://$BOULDER_IP:4000/directory}
 # Use local ACMEv2 endpoint if requested and SERVER isn't already set.
 if [ "${BOULDER_INTEGRATION:-v1}" = "v2" -a -z "${SERVER:+x}" ]; then
-    SERVER="http://10.77.77.77:4001/directory"
+    SERVER="http://$BOULDER_IP:4001/directory"
 fi
 
 certbot_test_no_force_renew () {
@@ -30,7 +32,7 @@ certbot_test_no_force_renew () {
         --source $sources \
         --omit $omit_patterns \
         $(command -v certbot) \
-            --server "${SERVER:-http://10.77.77.77:4000/directory}" \
+            --server "${SERVER}" \
             --no-verify-ssl \
             --tls-sni-01-port $tls_sni_01_port \
             --http-01-port $http_01_port \
diff --git a/tests/manual-dns-auth.sh b/tests/manual-dns-auth.sh
index febecf455..121b21ac0 100755
--- a/tests/manual-dns-auth.sh
+++ b/tests/manual-dns-auth.sh
@@ -2,7 +2,7 @@
 
 # If domain begins with fail, fail the challenge by not completing it.
 if [[ "$CERTBOT_DOMAIN" != fail* ]]; then
-    curl -X POST 'http://localhost:8055/set-txt' -d \
+    curl -X POST 'http://$BOULDER_IP:8055/set-txt' -d \
         "{\"host\": \"_acme-challenge.$CERTBOT_DOMAIN.\", \
          \"value\": \"$CERTBOT_VALIDATION\"}"
 fi
diff --git a/tests/manual-dns-cleanup.sh b/tests/manual-dns-cleanup.sh
index 1c09e892c..8fa2ebbc4 100755
--- a/tests/manual-dns-cleanup.sh
+++ b/tests/manual-dns-cleanup.sh
@@ -3,6 +3,6 @@
 # If domain begins with fail, we didn't complete the challenge so there is
 # nothing to clean up.
 if [[ "$CERTBOT_DOMAIN" != fail* ]]; then
-    curl -X POST 'http://localhost:8055/clear-txt' -d \
+    curl -X POST 'http://$BOULDER_IP:8055/clear-txt' -d \
         "{\"host\": \"_acme-challenge.$CERTBOT_DOMAIN.\"}"
 fi
diff --git a/tools/deactivate.py b/tools/deactivate.py
index 2f8b2e6e3..d43b84552 100644
--- a/tools/deactivate.py
+++ b/tools/deactivate.py
@@ -24,7 +24,7 @@ from acme import client as acme_client
 from acme import errors as acme_errors
 from acme import messages
 
-DIRECTORY = os.getenv('DIRECTORY', 'http://10.77.77.77:4000/directory')
+DIRECTORY = os.getenv('DIRECTORY', 'http://localhost:4000/directory')
 
 if len(sys.argv) != 2:
     print("Usage: python deactivate.py private_key.pem")