diff --git a/README.md b/README.md
index 44e80d8..ad40802 100644
--- a/README.md
+++ b/README.md
@@ -133,26 +133,26 @@ dokku mysql:destroy lolipop
 ## Changing database adapter
 
 It's possible to change the protocol for DATABASE_URL by setting
-the environment variable DATABASE_SCHEME on the app:
+the environment variable MYSQL_DATABASE_SCHEME on the app:
 
 ```
-dokku config:set playground DATABASE_SCHEME=mysql2
+dokku config:set playground MYSQL_DATABASE_SCHEME=mysql2
 dokku mysql:link lolipop playground
 ```
 
 Will cause DATABASE_URL to be set as
 mysql2://mysql:SOME_PASSWORD@dokku-mysql-lolipop:3306/lolipop
 
-CAUTION: Changing DATABASE_SCHEME after linking will cause dokku to believe
-the service is not linked when attempting to use `dokku mysql:unlink` or
-`dokku mysql:promote`.
+CAUTION: Changing MYSQL_DATABASE_SCHEME after linking will cause dokku to
+believe the service is not linked when attempting to use `dokku mysql:unlink`
+or `dokku mysql:promote`.
 You should be able to fix this by
 
 - Changing DATABASE_URL manually to the new value.
 
 OR
 
-- Set DATABASE_SCHEME back to its original setting
+- Set MYSQL_DATABASE_SCHEME back to its original setting
 - Unlink the service
-- Change DATABASE_SCHEME to the desired setting
+- Change MYSQL_DATABASE_SCHEME to the desired setting
 - Relink the service
diff --git a/functions b/functions
index ce1d6fa..5e003df 100755
--- a/functions
+++ b/functions
@@ -357,6 +357,6 @@ service_linked_apps() {
 
 update_plugin_scheme_for_app() {
   local APP=$1
-  local DATABASE_SCHEME=$(config_get $APP DATABASE_SCHEME)
-  PLUGIN_SCHEME=${DATABASE_SCHEME:-$PLUGIN_SCHEME}
+  local MYSQL_DATABASE_SCHEME=$(config_get $APP MYSQL_DATABASE_SCHEME)
+  PLUGIN_SCHEME=${MYSQL_DATABASE_SCHEME:-$PLUGIN_SCHEME}
 }
diff --git a/tests/service_link.bats b/tests/service_link.bats
index de1fc00..978fab3 100755
--- a/tests/service_link.bats
+++ b/tests/service_link.bats
@@ -60,8 +60,8 @@ teardown() {
   dokku "$PLUGIN_COMMAND_PREFIX:unlink" l my_app
 }
 
-@test "($PLUGIN_COMMAND_PREFIX:link) uses apps DATABASE_SCHEME variable" {
-  dokku config:set my_app DATABASE_SCHEME=mysql2
+@test "($PLUGIN_COMMAND_PREFIX:link) uses apps MYSQL_DATABASE_SCHEME variable" {
+  dokku config:set my_app MYSQL_DATABASE_SCHEME=mysql2
   dokku "$PLUGIN_COMMAND_PREFIX:link" l my_app
   url=$(dokku config:get my_app DATABASE_URL)
   password="$(cat "$PLUGIN_DATA_ROOT/l/PASSWORD")"
diff --git a/tests/service_promote.bats b/tests/service_promote.bats
index 94a3f13..9bd3f52 100755
--- a/tests/service_promote.bats
+++ b/tests/service_promote.bats
@@ -54,9 +54,9 @@ teardown() {
   assert_contains "${lines[*]}" "DOKKU_MYSQL_"
 }
 
-@test "($PLUGIN_COMMAND_PREFIX:promote) uses DATABASE_SCHEME variable" {
+@test "($PLUGIN_COMMAND_PREFIX:promote) uses MYSQL_DATABASE_SCHEME variable" {
   password="$(cat "$PLUGIN_DATA_ROOT/l/PASSWORD")"
-  dokku config:set my_app "DATABASE_SCHEME=mysql2" "DATABASE_URL=mysql://u:p@host:3306/db" "DOKKU_MYSQL_BLUE_URL=mysql2://mysql:$password@dokku-mysql-l:3306/l"
+  dokku config:set my_app "MYSQL_DATABASE_SCHEME=mysql2" "DATABASE_URL=mysql://u:p@host:3306/db" "DOKKU_MYSQL_BLUE_URL=mysql2://mysql:$password@dokku-mysql-l:3306/l"
   dokku "$PLUGIN_COMMAND_PREFIX:promote" l my_app
   url=$(dokku config:get my_app DATABASE_URL)
   assert_contains "$url" "mysql2://mysql:$password@dokku-mysql-l:3306/l"