diff --git a/.travis.yml b/.travis.yml
index 451fe6f..81181d5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,10 +2,9 @@ sudo: required
 dist: trusty
 language: bash
 env:
-  - DOKKU_VERSION=master
-  - DOKKU_VERSION=v0.7.0
-  - DOKKU_VERSION=v0.6.0
-  - DOKKU_VERSION=v0.5.0
-  - DOKKU_VERSION=v0.4.0
-before_install: make setup
+  - DOKKU_VERSION=master DOKKU_SYSTEM_GROUP=travis DOKKU_SYSTEM_USER=travis
+  - DOKKU_VERSION=v0.7.0 DOKKU_SYSTEM_GROUP=travis DOKKU_SYSTEM_USER=travis
+  - DOKKU_VERSION=v0.6.0 DOKKU_SYSTEM_GROUP=travis DOKKU_SYSTEM_USER=travis
+  - DOKKU_VERSION=v0.5.0 DOKKU_SYSTEM_GROUP=travis DOKKU_SYSTEM_USER=travis
+  - DOKKU_VERSION=v0.4.0 DOKKU_SYSTEM_GROUP=travis DOKKU_SYSTEM_USER=travis
 script: make test
diff --git a/README.md b/README.md
index 6dd0a26..bf4b08e 100644
--- a/README.md
+++ b/README.md
@@ -30,11 +30,13 @@ mongo:connect-admin <name>     Connect via telnet to a mongo service as admin us
 mongo:create <name>            Create a mongo service with environment variables
 mongo:destroy <name>           Delete the service, delete the data and stop its container if there are no links left
 mongo:enter <name> [command]   Enter or run a command in a running mongo service container
+mongo:exists <service>         Check if the mongo service exists
 mongo:export <name> > <file>   Export a dump of the mongo service database
 mongo:expose <name> [port]     Expose a mongo service on custom port if provided (random port otherwise)
 mongo:import <name> < <file>   Import a dump into the mongo service database
 mongo:info <name>              Print the connection information
 mongo:link <name> <app>        Link the mongo service to the app
+mongo:linked <name> <app>      Check if the mongo service is linked to an app
 mongo:list                     List all mongo services
 mongo:logs <name> [-t]         Print the most recent log(s) for this service
 mongo:promote <name> <app>     Promote service <name> as MONGO_URL in <app>
diff --git a/common-functions b/common-functions
index 413c050..7450339 100755
--- a/common-functions
+++ b/common-functions
@@ -1,5 +1,6 @@
 #!/usr/bin/env bash
 set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
+source "$PLUGIN_AVAILABLE_PATH/config/functions"
 
 docker_ports_options() {
   declare desc="Exports a list of exposed ports"
@@ -288,6 +289,20 @@ service_info() {
   fi
 }
 
+service_is_linked() {
+  declare desc="Links a service to an application"
+  declare SERVICE="$1" APP="$2"
+  update_plugin_scheme_for_app "$APP"
+  local SERVICE_URL=$(service_url "$SERVICE")
+  local EXISTING_CONFIG=$(config_all "$APP")
+  local LINK=$(echo "$EXISTING_CONFIG" | grep "$SERVICE_URL" | cut -d: -f1) || true
+  if [[ -z $LINK ]]; then
+    dokku_log_warn "Service $SERVICE is not linked to $APP"
+    exit 1
+  fi
+  dokku_log_info1 "Service $SERVICE is linked to $APP"
+}
+
 service_link() {
   declare desc="Links a service to an application"
   declare SERVICE="$1" APP="$2"
diff --git a/subcommands/exists b/subcommands/exists
new file mode 100755
index 0000000..93b6a99
--- /dev/null
+++ b/subcommands/exists
@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+source "$(dirname "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)")/config"
+set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
+source "$PLUGIN_BASE_PATH/common/functions"
+source "$(dirname "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)")/functions"
+
+service-exists-cmd() {
+  #E here we check if the lolipop $PLUGIN_COMMAND_PREFIX service exists.
+  #E dokku $PLUGIN_COMMAND_PREFIX:exists lolipop
+  #A service, service to run command against
+  declare desc="check if the $PLUGIN_SERVICE service exists"
+  local cmd="$PLUGIN_COMMAND_PREFIX:exists" argv=("$@"); [[ ${argv[0]} == "$cmd" ]] && shift 1
+  declare SERVICE="$1"
+
+  [[ -z "$SERVICE" ]] && dokku_log_fail "Please specify a name for the service"
+  verify_service_name "$SERVICE"
+  dokku_log_info1 "Service $SERVICE exists"
+}
+
+service-exists-cmd "$@"
diff --git a/subcommands/linked b/subcommands/linked
new file mode 100755
index 0000000..f5a1789
--- /dev/null
+++ b/subcommands/linked
@@ -0,0 +1,24 @@
+#!/usr/bin/env bash
+source "$(dirname "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)")/config"
+set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
+source "$PLUGIN_BASE_PATH/common/functions"
+source "$(dirname "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)")/functions"
+
+service-linked-cmd() {
+  #E here we check if the lolipop $PLUGIN_COMMAND_PREFIX service is linked to the 'playground' app.
+  #E dokku $PLUGIN_COMMAND_PREFIX:linked lolipop playground
+  #A service, service to run command against
+  #A app, app to run command against
+  declare desc="check if the $PLUGIN_SERVICE service is linked to an app"
+  local cmd="$PLUGIN_COMMAND_PREFIX:linked" argv=("$@"); [[ ${argv[0]} == "$cmd" ]] && shift 1
+  declare SERVICE="$1" APP="$2"
+  APP=${APP:="$DOKKU_APP_NAME"}
+
+  [[ -z "$SERVICE" ]] && dokku_log_fail "Please specify a name for the service"
+  [[ -z "$APP" ]] && dokku_log_fail "Please specify an app to run the command on"
+  verify_app_name "$APP"
+  verify_service_name "$SERVICE"
+  service_is_linked "$SERVICE" "$APP"
+}
+
+service-linked-cmd "$@"
diff --git a/tests/service_unlink.bats b/tests/service_unlink.bats
index a20a187..50a5c2b 100755
--- a/tests/service_unlink.bats
+++ b/tests/service_unlink.bats
@@ -39,10 +39,20 @@ teardown() {
 @test "($PLUGIN_COMMAND_PREFIX:unlink) removes link from docker-options" {
   dokku "$PLUGIN_COMMAND_PREFIX:link" l my_app >&2
   dokku "$PLUGIN_COMMAND_PREFIX:unlink" l my_app
-  options=$(dokku docker-options my_app | xargs)
+
   check_value=""
-  [[ "$(dokku version)" == "master" ]] && check_value="Deploy options: --restart=on-failure:10"
-  [[ "$(at-least-version 0.7.0 "$(dokku version)")" == "true" ]] && check_value="Deploy options: --restart=on-failure:10"
+  report_action="docker-options"
+  if [[ "$(dokku version)" == "master" ]]; then
+    check_value="Docker options build: Docker options deploy: --restart=on-failure:10 Docker options run:"
+    report_action="docker-options:report"
+  elif [[ "$(at-least-version 0.8.1 "$(dokku version)")" == "true" ]]; then
+    check_value="Docker options build: Docker options deploy: --restart=on-failure:10 Docker options run:"
+    report_action="docker-options:report"
+  elif [[ "$(at-least-version 0.7.0 "$(dokku version)")" == "true" ]]; then
+    check_value="Deploy options: --restart=on-failure:10"
+  fi
+
+  options=$(dokku $report_action my_app | xargs)
   assert_equal "$options" "$check_value"
 }
 
diff --git a/tests/setup.sh b/tests/setup.sh
index 5703c57..9f78440 100644
--- a/tests/setup.sh
+++ b/tests/setup.sh
@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
 source "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/test_helper.bash"
 
 BIN_STUBS="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/bin"
@@ -10,6 +11,11 @@ fi
 cd $DOKKU_ROOT
 echo "Dokku version $DOKKU_VERSION"
 git checkout $DOKKU_VERSION > /dev/null
+if grep go-build Makefile > /dev/null; then
+  mv "$BIN_STUBS/docker" "$BIN_STUBS/docker-stub"
+  make go-build
+  mv "$BIN_STUBS/docker-stub" "$BIN_STUBS/docker"
+fi
 cd -
 
 source "$(dirname "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)")/config"
diff --git a/tests/test_helper.bash b/tests/test_helper.bash
index f2e0b2e..d5ec338 100644
--- a/tests/test_helper.bash
+++ b/tests/test_helper.bash
@@ -11,6 +11,7 @@ export PLUGIN_CORE_AVAILABLE_PATH="$PLUGIN_PATH"
 export MONGO_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/fixtures"
 export PLUGIN_DATA_ROOT="$MONGO_ROOT"
 export PLUGIN_CONFIG_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/config"
+export DOKKU_LIB_PATH="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/lib-root"
 if [[ "$(uname)" == "Darwin" ]]; then
   export PLUGN_URL="https://github.com/dokku/plugn/releases/download/v0.3.0/plugn_0.3.0_darwin_x86_64.tgz"
 else