diff --git a/activerecord/lib/active_record/railties/databases.rake b/activerecord/lib/active_record/railties/databases.rake
index 447def8d77..64a4cb0886 100644
--- a/activerecord/lib/active_record/railties/databases.rake
+++ b/activerecord/lib/active_record/railties/databases.rake
@@ -78,7 +78,7 @@ db_namespace = namespace :db do
 
   desc "Migrate the database (options: VERSION=x, VERBOSE=false, SCOPE=blog)."
   task migrate: :load_config do
-    ActiveRecord::Base.configurations.configs_for(env_name: Rails.env).each do |db_config|
+    ActiveRecord::Base.configurations.configs_for(env_name: ActiveRecord::Tasks::DatabaseTasks.env).each do |db_config|
       ActiveRecord::Base.establish_connection(db_config.config)
       ActiveRecord::Tasks::DatabaseTasks.migrate
     end
@@ -154,7 +154,7 @@ db_namespace = namespace :db do
 
     desc "Display status of migrations"
     task status: :load_config do
-      ActiveRecord::Base.configurations.configs_for(env_name: Rails.env).each do |db_config|
+      ActiveRecord::Base.configurations.configs_for(env_name: ActiveRecord::Tasks::DatabaseTasks.env).each do |db_config|
         ActiveRecord::Base.establish_connection(db_config.config)
         ActiveRecord::Tasks::DatabaseTasks.migrate_status
       end
@@ -224,7 +224,7 @@ db_namespace = namespace :db do
 
   desc "Runs setup if database does not exist, or runs migrations if it does"
   task prepare: :load_config do
-    ActiveRecord::Base.configurations.configs_for(env_name: Rails.env).each do |db_config|
+    ActiveRecord::Base.configurations.configs_for(env_name: ActiveRecord::Tasks::DatabaseTasks.env).each do |db_config|
       ActiveRecord::Base.establish_connection(db_config.config)
       db_namespace["migrate"].invoke
     rescue ActiveRecord::NoDatabaseError
@@ -295,7 +295,7 @@ db_namespace = namespace :db do
     desc "Creates a db/schema.rb file that is portable against any DB supported by Active Record"
     task dump: :load_config do
       require "active_record/schema_dumper"
-      ActiveRecord::Base.configurations.configs_for(env_name: Rails.env).each do |db_config|
+      ActiveRecord::Base.configurations.configs_for(env_name: ActiveRecord::Tasks::DatabaseTasks.env).each do |db_config|
         filename = ActiveRecord::Tasks::DatabaseTasks.dump_filename(db_config.spec_name, :ruby)
         File.open(filename, "w:utf-8") do |file|
           ActiveRecord::Base.establish_connection(db_config.config)
@@ -318,7 +318,7 @@ db_namespace = namespace :db do
     namespace :cache do
       desc "Creates a db/schema_cache.yml file."
       task dump: :load_config do
-        ActiveRecord::Base.configurations.configs_for(env_name: Rails.env).each do |db_config|
+        ActiveRecord::Base.configurations.configs_for(env_name: ActiveRecord::Tasks::DatabaseTasks.env).each do |db_config|
           ActiveRecord::Base.establish_connection(db_config.config)
           filename = ActiveRecord::Tasks::DatabaseTasks.cache_dump_filename(db_config.spec_name)
           ActiveRecord::Tasks::DatabaseTasks.dump_schema_cache(
@@ -330,7 +330,7 @@ db_namespace = namespace :db do
 
       desc "Clears a db/schema_cache.yml file."
       task clear: :load_config do
-        ActiveRecord::Base.configurations.configs_for(env_name: Rails.env).each do |db_config|
+        ActiveRecord::Base.configurations.configs_for(env_name: ActiveRecord::Tasks::DatabaseTasks.env).each do |db_config|
           filename = ActiveRecord::Tasks::DatabaseTasks.cache_dump_filename(db_config.spec_name)
           rm_f filename, verbose: false
         end
@@ -341,7 +341,7 @@ db_namespace = namespace :db do
   namespace :structure do
     desc "Dumps the database structure to db/structure.sql. Specify another file with SCHEMA=db/my_structure.sql"
     task dump: :load_config do
-      ActiveRecord::Base.configurations.configs_for(env_name: Rails.env).each do |db_config|
+      ActiveRecord::Base.configurations.configs_for(env_name: ActiveRecord::Tasks::DatabaseTasks.env).each do |db_config|
         ActiveRecord::Base.establish_connection(db_config.config)
         filename = ActiveRecord::Tasks::DatabaseTasks.dump_filename(db_config.spec_name, :sql)
         ActiveRecord::Tasks::DatabaseTasks.structure_dump(db_config.config, filename)
diff --git a/activerecord/lib/active_record/tasks/database_tasks.rb b/activerecord/lib/active_record/tasks/database_tasks.rb
index 7285c15477..53e7e1e6d7 100644
--- a/activerecord/lib/active_record/tasks/database_tasks.rb
+++ b/activerecord/lib/active_record/tasks/database_tasks.rb
@@ -142,6 +142,8 @@ module ActiveRecord
       end
 
       def for_each
+        return {} unless defined?(Rails)
+
         databases = Rails.application.config.load_database_yaml
         database_configs = ActiveRecord::DatabaseConfigurations.new(databases).configs_for(env_name: Rails.env)