diff --git a/Gemfile b/Gemfile
index 6d16371..2416d81 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,4 +3,5 @@ gemspec
 path "./adapters" do
   gem "database_cleaner-active_record"
   gem "database_cleaner-couch_potato"
+  gem "database_cleaner-data_mapper"
 end
diff --git a/Gemfile.lock b/Gemfile.lock
index ad08d6a..0da4202 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -12,6 +12,9 @@ PATH
     database_cleaner-couch_potato (1.8.0)
       couch_potato
       database_cleaner (~> 1.8.0)
+    database_cleaner-data_mapper (1.8.0)
+      database_cleaner (~> 1.8.0)
+      datamapper
 
 GEM
   remote: https://rubygems.org/
@@ -259,6 +262,7 @@ DEPENDENCIES
   database_cleaner!
   database_cleaner-active_record!
   database_cleaner-couch_potato!
+  database_cleaner-data_mapper!
   datamapper
   dm-migrations
   dm-sqlite-adapter
diff --git a/adapters/database_cleaner-data_mapper/.gitignore b/adapters/database_cleaner-data_mapper/.gitignore
new file mode 100644
index 0000000..a2164d5
--- /dev/null
+++ b/adapters/database_cleaner-data_mapper/.gitignore
@@ -0,0 +1,13 @@
+/.bundle/
+/.yardoc
+/_yardoc/
+/coverage/
+/doc/
+/pkg/
+/spec/reports/
+/spec/support/config.yml
+/tmp/
+!/tmp/.keep
+
+# rspec failure tracking
+.rspec_status
diff --git a/adapters/database_cleaner-data_mapper/.rspec b/adapters/database_cleaner-data_mapper/.rspec
new file mode 100644
index 0000000..34c5164
--- /dev/null
+++ b/adapters/database_cleaner-data_mapper/.rspec
@@ -0,0 +1,3 @@
+--format documentation
+--color
+--require spec_helper
diff --git a/adapters/database_cleaner-data_mapper/.travis.yml b/adapters/database_cleaner-data_mapper/.travis.yml
new file mode 100644
index 0000000..0dc6355
--- /dev/null
+++ b/adapters/database_cleaner-data_mapper/.travis.yml
@@ -0,0 +1,5 @@
+sudo: false
+language: ruby
+rvm:
+  - 2.2.9
+before_install: gem install bundler -v 1.16.1
diff --git a/adapters/database_cleaner-data_mapper/Gemfile b/adapters/database_cleaner-data_mapper/Gemfile
new file mode 100644
index 0000000..10d5f58
--- /dev/null
+++ b/adapters/database_cleaner-data_mapper/Gemfile
@@ -0,0 +1,8 @@
+source "https://rubygems.org"
+
+git_source(:github) {|repo_name| "https://github.com/#{repo_name}" }
+
+# Specify your gem's dependencies in database_cleaner-data_mapper.gemspec
+gemspec
+
+gem "database_cleaner", path: "../.."
diff --git a/adapters/database_cleaner-data_mapper/Gemfile.lock b/adapters/database_cleaner-data_mapper/Gemfile.lock
new file mode 100644
index 0000000..b5ba80d
--- /dev/null
+++ b/adapters/database_cleaner-data_mapper/Gemfile.lock
@@ -0,0 +1,103 @@
+PATH
+  remote: ../..
+  specs:
+    database_cleaner (1.8.0)
+
+PATH
+  remote: .
+  specs:
+    database_cleaner-data_mapper (1.8.0)
+      database_cleaner (~> 1.8.0)
+      datamapper
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.3.6)
+    bcrypt (3.1.7)
+    bcrypt-ruby (3.1.5)
+      bcrypt (>= 3.1.3)
+    data_objects (0.10.14)
+      addressable (~> 2.1)
+    datamapper (1.2.0)
+      dm-aggregates (~> 1.2.0)
+      dm-constraints (~> 1.2.0)
+      dm-core (~> 1.2.0)
+      dm-migrations (~> 1.2.0)
+      dm-serializer (~> 1.2.0)
+      dm-timestamps (~> 1.2.0)
+      dm-transactions (~> 1.2.0)
+      dm-types (~> 1.2.0)
+      dm-validations (~> 1.2.0)
+    diff-lcs (1.3)
+    dm-aggregates (1.2.0)
+      dm-core (~> 1.2.0)
+    dm-constraints (1.2.0)
+      dm-core (~> 1.2.0)
+    dm-core (1.2.1)
+      addressable (~> 2.3)
+    dm-do-adapter (1.2.0)
+      data_objects (~> 0.10.6)
+      dm-core (~> 1.2.0)
+    dm-migrations (1.2.0)
+      dm-core (~> 1.2.0)
+    dm-serializer (1.2.2)
+      dm-core (~> 1.2.0)
+      fastercsv (~> 1.5)
+      json (~> 1.6)
+      json_pure (~> 1.6)
+      multi_json (~> 1.0)
+    dm-sqlite-adapter (1.2.0)
+      dm-do-adapter (~> 1.2.0)
+      do_sqlite3 (~> 0.10.6)
+    dm-timestamps (1.2.0)
+      dm-core (~> 1.2.0)
+    dm-transactions (1.2.0)
+      dm-core (~> 1.2.0)
+    dm-types (1.2.2)
+      bcrypt-ruby (~> 3.0)
+      dm-core (~> 1.2.0)
+      fastercsv (~> 1.5)
+      json (~> 1.6)
+      multi_json (~> 1.0)
+      stringex (~> 1.4)
+      uuidtools (~> 2.1)
+    dm-validations (1.2.0)
+      dm-core (~> 1.2.0)
+    do_sqlite3 (0.10.14)
+      data_objects (= 0.10.14)
+    fastercsv (1.5.5)
+    json (1.8.6)
+    json_pure (1.8.1)
+    multi_json (1.2.0)
+    rake (10.4.2)
+    rspec (3.7.0)
+      rspec-core (~> 3.7.0)
+      rspec-expectations (~> 3.7.0)
+      rspec-mocks (~> 3.7.0)
+    rspec-core (3.7.1)
+      rspec-support (~> 3.7.0)
+    rspec-expectations (3.7.0)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.7.0)
+    rspec-mocks (3.7.0)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.7.0)
+    rspec-support (3.7.1)
+    stringex (1.5.1)
+    uuidtools (2.1.5)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  bundler (~> 1.16)
+  database_cleaner!
+  database_cleaner-data_mapper!
+  dm-migrations
+  dm-sqlite-adapter
+  rake (~> 10.0)
+  rspec (~> 3.0)
+
+BUNDLED WITH
+   1.16.1
diff --git a/adapters/database_cleaner-data_mapper/LICENSE.txt b/adapters/database_cleaner-data_mapper/LICENSE.txt
new file mode 100644
index 0000000..392bc0d
--- /dev/null
+++ b/adapters/database_cleaner-data_mapper/LICENSE.txt
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2009 Ben Mabey
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/adapters/database_cleaner-data_mapper/README.md b/adapters/database_cleaner-data_mapper/README.md
new file mode 100644
index 0000000..f25366f
--- /dev/null
+++ b/adapters/database_cleaner-data_mapper/README.md
@@ -0,0 +1,39 @@
+# DatabaseCleaner::DataMapper
+
+Welcome to your new gem! In this directory, you'll find the files you need to be able to package up your Ruby library into a gem. Put your Ruby code in the file `lib/database_cleaner/data_mapper`. To experiment with that code, run `bin/console` for an interactive prompt.
+
+TODO: Delete this and the text above, and describe your gem
+
+## Installation
+
+Add this line to your application's Gemfile:
+
+```ruby
+gem 'database_cleaner-data_mapper'
+```
+
+And then execute:
+
+    $ bundle
+
+Or install it yourself as:
+
+    $ gem install database_cleaner-data_mapper
+
+## Usage
+
+TODO: Write usage instructions here
+
+## Development
+
+After checking out the repo, run `bin/setup` to install dependencies. Then, run `rake spec` to run the tests. You can also run `bin/console` for an interactive prompt that will allow you to experiment.
+
+To install this gem onto your local machine, run `bundle exec rake install`. To release a new version, update the version number in `version.rb`, and then run `bundle exec rake release`, which will create a git tag for the version, push git commits and tags, and push the `.gem` file to [rubygems.org](https://rubygems.org).
+
+## Contributing
+
+Bug reports and pull requests are welcome on GitHub at https://github.com/[USERNAME]/database_cleaner-data_mapper.
+
+## License
+
+The gem is available as open source under the terms of the [MIT License](https://opensource.org/licenses/MIT).
diff --git a/adapters/database_cleaner-data_mapper/Rakefile b/adapters/database_cleaner-data_mapper/Rakefile
new file mode 100644
index 0000000..b7e9ed5
--- /dev/null
+++ b/adapters/database_cleaner-data_mapper/Rakefile
@@ -0,0 +1,6 @@
+require "bundler/gem_tasks"
+require "rspec/core/rake_task"
+
+RSpec::Core::RakeTask.new(:spec)
+
+task :default => :spec
diff --git a/adapters/database_cleaner-data_mapper/bin/console b/adapters/database_cleaner-data_mapper/bin/console
new file mode 100755
index 0000000..66190aa
--- /dev/null
+++ b/adapters/database_cleaner-data_mapper/bin/console
@@ -0,0 +1,14 @@
+#!/usr/bin/env ruby
+
+require "bundler/setup"
+require "database_cleaner/data_mapper"
+
+# You can add fixtures and/or initialization code here to make experimenting
+# with your gem easier. You can also use a different console, if you like.
+
+# (If you use this, don't forget to add pry to your Gemfile!)
+# require "pry"
+# Pry.start
+
+require "irb"
+IRB.start(__FILE__)
diff --git a/adapters/database_cleaner-data_mapper/bin/setup b/adapters/database_cleaner-data_mapper/bin/setup
new file mode 100755
index 0000000..dce67d8
--- /dev/null
+++ b/adapters/database_cleaner-data_mapper/bin/setup
@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+set -euo pipefail
+IFS=$'\n\t'
+set -vx
+
+bundle install
+
+# Do any other automated setup that you need to do here
diff --git a/adapters/database_cleaner-data_mapper/database_cleaner-data_mapper.gemspec b/adapters/database_cleaner-data_mapper/database_cleaner-data_mapper.gemspec
new file mode 100644
index 0000000..55dceac
--- /dev/null
+++ b/adapters/database_cleaner-data_mapper/database_cleaner-data_mapper.gemspec
@@ -0,0 +1,33 @@
+
+lib = File.expand_path("../lib", __FILE__)
+$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
+require "database_cleaner/data_mapper/version"
+
+Gem::Specification.new do |spec|
+  spec.name          = "database_cleaner-data_mapper"
+  spec.version       = DatabaseCleaner::DataMapper::VERSION
+  spec.authors       = ["Ernesto Tagwerker"]
+  spec.email         = ["ernesto@ombulabs.com"]
+
+  spec.summary       = "Strategies for cleaning databases using DataMapper. Can be used to ensure a clean state for testing."
+  spec.description   = "Strategies for cleaning databases using DataMapper. Can be used to ensure a clean state for testing."
+  spec.homepage      = "https://github.com/DatabaseCleaner/database_cleaner-data_mapper"
+  spec.license       = "MIT"
+
+  spec.files         = `git ls-files -z`.split("\x0").reject do |f|
+    f.match(%r{^(test|spec|features)/})
+  end
+  spec.bindir        = "exe"
+  spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
+  spec.require_paths = ["lib"]
+
+  spec.add_dependency "database_cleaner", "~> 1.8.0"
+  spec.add_dependency "datamapper"
+
+  spec.add_development_dependency "rake", "~> 10.0"
+  spec.add_development_dependency "bundler", "~> 1.16"
+  spec.add_development_dependency "rspec", "~> 3.0"
+
+  spec.add_development_dependency "dm-sqlite-adapter"
+  # spec.add_development_dependency "dm-migrations"
+end
diff --git a/adapters/database_cleaner-data_mapper/lib/database_cleaner-data_mapper.rb b/adapters/database_cleaner-data_mapper/lib/database_cleaner-data_mapper.rb
new file mode 100644
index 0000000..0be5186
--- /dev/null
+++ b/adapters/database_cleaner-data_mapper/lib/database_cleaner-data_mapper.rb
@@ -0,0 +1 @@
+require "database_cleaner/data_mapper"
diff --git a/adapters/database_cleaner-data_mapper/lib/database_cleaner/data_mapper.rb b/adapters/database_cleaner-data_mapper/lib/database_cleaner/data_mapper.rb
new file mode 100644
index 0000000..26af40e
--- /dev/null
+++ b/adapters/database_cleaner-data_mapper/lib/database_cleaner/data_mapper.rb
@@ -0,0 +1,4 @@
+require "database_cleaner/data_mapper/version"
+require "database_cleaner"
+require "database_cleaner/data_mapper/transaction"
+require "database_cleaner/data_mapper/truncation"
diff --git a/adapters/database_cleaner-data_mapper/lib/database_cleaner/data_mapper/base.rb b/adapters/database_cleaner-data_mapper/lib/database_cleaner/data_mapper/base.rb
new file mode 100644
index 0000000..64a303c
--- /dev/null
+++ b/adapters/database_cleaner-data_mapper/lib/database_cleaner/data_mapper/base.rb
@@ -0,0 +1,21 @@
+require 'database_cleaner/generic/base'
+module DatabaseCleaner
+  module DataMapper
+    def self.available_strategies
+      %w[truncation transaction]
+    end
+
+    module Base
+      include ::DatabaseCleaner::Generic::Base
+
+      def db=(desired_db)
+        @db = desired_db
+      end
+
+      def db
+        @db ||= :default
+      end
+
+    end
+  end
+end
diff --git a/adapters/database_cleaner-data_mapper/lib/database_cleaner/data_mapper/transaction.rb b/adapters/database_cleaner-data_mapper/lib/database_cleaner/data_mapper/transaction.rb
new file mode 100644
index 0000000..31b3287
--- /dev/null
+++ b/adapters/database_cleaner-data_mapper/lib/database_cleaner/data_mapper/transaction.rb
@@ -0,0 +1,28 @@
+require 'database_cleaner/data_mapper/base'
+require 'database_cleaner/generic/transaction'
+
+module DatabaseCleaner::DataMapper
+  class Transaction
+    include ::DatabaseCleaner::DataMapper::Base
+    include ::DatabaseCleaner::Generic::Transaction
+
+    def start(repository = self.db)
+      ::DataMapper.repository(repository) do |r|
+        transaction = DataMapper::Transaction.new(r)
+        transaction.begin
+        r.adapter.push_transaction(transaction)
+      end
+    end
+
+    def clean(repository = self.db)
+      ::DataMapper.repository(repository) do |r|
+        adapter = r.adapter
+        while adapter.current_transaction
+          adapter.current_transaction.rollback
+          adapter.pop_transaction
+        end
+      end
+    end
+
+  end
+end
diff --git a/adapters/database_cleaner-data_mapper/lib/database_cleaner/data_mapper/truncation.rb b/adapters/database_cleaner-data_mapper/lib/database_cleaner/data_mapper/truncation.rb
new file mode 100644
index 0000000..06a7439
--- /dev/null
+++ b/adapters/database_cleaner-data_mapper/lib/database_cleaner/data_mapper/truncation.rb
@@ -0,0 +1,173 @@
+require "database_cleaner/generic/truncation"
+require 'database_cleaner/data_mapper/base'
+require 'data_mapper'
+
+module DataMapper
+  module Adapters
+
+    class DataObjectsAdapter
+
+      def storage_names(repository = :default)
+        raise NotImplementedError
+      end
+
+      def truncate_tables(table_names)
+        table_names.each do |table_name|
+          truncate_table table_name
+        end
+      end
+
+    end
+
+    class MysqlAdapter < DataObjectsAdapter
+
+      # taken from http://github.com/godfat/dm-mapping/tree/master
+      def storage_names(repository = :default)
+        select 'SHOW TABLES'
+      end
+
+      def truncate_table(table_name)
+        execute("TRUNCATE TABLE #{quote_name(table_name)};")
+      end
+
+      # copied from activerecord
+      def disable_referential_integrity
+        old = select("SELECT @@FOREIGN_KEY_CHECKS;")
+        begin
+          execute("SET FOREIGN_KEY_CHECKS = 0;")
+          yield
+        ensure
+          execute("SET FOREIGN_KEY_CHECKS = ?", *old)
+        end
+      end
+
+    end
+
+    module SqliteAdapterMethods
+
+      # taken from http://github.com/godfat/dm-mapping/tree/master
+      def storage_names(repository = :default)
+        # activerecord-2.1.0/lib/active_record/connection_adapters/sqlite_adapter.rb: 177
+        sql = <<-SQL
+          SELECT name
+          FROM sqlite_master
+          WHERE type = 'table' AND NOT name = 'sqlite_sequence'
+        SQL
+        # activerecord-2.1.0/lib/active_record/connection_adapters/sqlite_adapter.rb: 181
+        select(sql)
+      end
+
+      def truncate_table(table_name)
+        execute("DELETE FROM #{quote_name(table_name)};")
+        if uses_sequence?
+          execute("DELETE FROM sqlite_sequence where name = '#{table_name}';")
+        end
+      end
+
+      # this is a no-op copied from activerecord
+      # i didn't find out if/how this is possible
+      # activerecord also doesn't do more here
+      def disable_referential_integrity
+        yield
+      end
+
+      private
+
+      # Returns a boolean indicating if the SQLite database is using the sqlite_sequence table.
+      def uses_sequence?
+        sql = <<-SQL
+          SELECT name FROM sqlite_master
+          WHERE type='table' AND name='sqlite_sequence'
+        SQL
+        select(sql).first
+      end
+    end
+
+    class SqliteAdapter; include SqliteAdapterMethods; end
+    class Sqlite3Adapter; include SqliteAdapterMethods; end
+
+    # FIXME
+    # i don't know if this works
+    # i basically just copied activerecord code to get a rough idea what they do.
+    # i don't have postgres available, so i won't be the one to write this.
+    # maybe codes below gets some postgres/datamapper user going, though.
+    class PostgresAdapter < DataObjectsAdapter
+
+      # taken from http://github.com/godfat/dm-mapping/tree/master
+      def storage_names(repository = :default)
+        sql = <<-SQL
+          SELECT table_name FROM "information_schema"."tables"
+          WHERE table_schema = current_schema() and table_type = 'BASE TABLE'
+        SQL
+        select(sql)
+      end
+
+      def truncate_table(table_name)
+        execute("TRUNCATE TABLE #{quote_name(table_name)} RESTART IDENTITY CASCADE;")
+      end
+
+      # override to use a single statement
+      def truncate_tables(table_names)
+        quoted_names = table_names.collect { |n| quote_name(n) }.join(', ')
+        execute("TRUNCATE TABLE #{quoted_names} RESTART IDENTITY;")
+      end
+
+      # FIXME
+      # copied from activerecord
+      def supports_disable_referential_integrity?
+        version = select("SHOW server_version")[0][0].split('.')
+        (version[0].to_i >= 8 && version[1].to_i >= 1) ? true : false
+      rescue
+        return false
+      end
+
+      # FIXME
+      # copied unchanged from activerecord
+      def disable_referential_integrity(repository = :default)
+        if supports_disable_referential_integrity? then
+          execute(storage_names(repository).collect do |name|
+            "ALTER TABLE #{quote_name(name)} DISABLE TRIGGER ALL"
+          end.join(";"))
+        end
+        yield
+      ensure
+        if supports_disable_referential_integrity? then
+          execute(storage_names(repository).collect do |name|
+            "ALTER TABLE #{quote_name(name)} ENABLE TRIGGER ALL"
+          end.join(";"))
+        end
+      end
+
+    end
+
+  end
+end
+
+
+module DatabaseCleaner
+  module DataMapper
+    class Truncation
+      include ::DatabaseCleaner::DataMapper::Base
+      include ::DatabaseCleaner::Generic::Truncation
+
+      def clean(repository = self.db)
+        adapter = ::DataMapper.repository(repository).adapter
+        adapter.disable_referential_integrity do
+          adapter.truncate_tables(tables_to_truncate(repository))
+        end
+      end
+
+      private
+
+      def tables_to_truncate(repository = self.db)
+        (@only || ::DataMapper.repository(repository).adapter.storage_names(repository)) - @tables_to_exclude
+      end
+
+      # overwritten
+      def migration_storage_names
+        %w[migration_info]
+      end
+
+    end
+  end
+end
diff --git a/adapters/database_cleaner-data_mapper/lib/database_cleaner/data_mapper/version.rb b/adapters/database_cleaner-data_mapper/lib/database_cleaner/data_mapper/version.rb
new file mode 100644
index 0000000..222e161
--- /dev/null
+++ b/adapters/database_cleaner-data_mapper/lib/database_cleaner/data_mapper/version.rb
@@ -0,0 +1,5 @@
+module DatabaseCleaner
+  module DataMapper
+    VERSION = "1.8.0"
+  end
+end
diff --git a/adapters/database_cleaner-data_mapper/spec/database_cleaner/data_mapper/base_spec.rb b/adapters/database_cleaner-data_mapper/spec/database_cleaner/data_mapper/base_spec.rb
new file mode 100644
index 0000000..9996763
--- /dev/null
+++ b/adapters/database_cleaner-data_mapper/spec/database_cleaner/data_mapper/base_spec.rb
@@ -0,0 +1,29 @@
+require 'database_cleaner/data_mapper/base'
+require 'database_cleaner/spec'
+
+module DatabaseCleaner
+  RSpec.describe DataMapper do
+    it { is_expected.to respond_to(:available_strategies) }
+  end
+
+  module DataMapper
+    class ExampleStrategy
+      include ::DatabaseCleaner::DataMapper::Base
+    end
+
+    RSpec.describe ExampleStrategy do
+      it_should_behave_like "a generic strategy"
+      it { is_expected.to respond_to(:db)  }
+      it { is_expected.to respond_to(:db=) }
+
+      it "should store my desired db" do
+        subject.db = :my_db
+        expect(subject.db).to eq :my_db
+      end
+
+      it "should default to :default" do
+        expect(subject.db).to eq :default
+      end
+    end
+  end
+end
diff --git a/adapters/database_cleaner-data_mapper/spec/database_cleaner/data_mapper/transaction_spec.rb b/adapters/database_cleaner-data_mapper/spec/database_cleaner/data_mapper/transaction_spec.rb
new file mode 100644
index 0000000..61e0431
--- /dev/null
+++ b/adapters/database_cleaner-data_mapper/spec/database_cleaner/data_mapper/transaction_spec.rb
@@ -0,0 +1,22 @@
+require 'database_cleaner/data_mapper/transaction'
+require 'database_cleaner/spec'
+#require 'data_mapper'
+
+module DatabaseCleaner
+  module DataMapper
+
+    RSpec.describe Transaction do
+      it_should_behave_like "a generic strategy"
+      it_should_behave_like "a generic transaction strategy"
+
+      describe "start" do
+        it "should start a transaction"
+      end
+
+      describe "clean" do
+        it "should finish a transaction"
+      end
+    end
+
+  end
+end
diff --git a/adapters/database_cleaner-data_mapper/spec/database_cleaner/data_mapper/truncation/sqlite3_spec.rb b/adapters/database_cleaner-data_mapper/spec/database_cleaner/data_mapper/truncation/sqlite3_spec.rb
new file mode 100644
index 0000000..49975ff
--- /dev/null
+++ b/adapters/database_cleaner-data_mapper/spec/database_cleaner/data_mapper/truncation/sqlite3_spec.rb
@@ -0,0 +1,25 @@
+require 'database_cleaner/data_mapper/truncation'
+
+RSpec.describe DatabaseCleaner::DataMapper::Truncation do
+  let(:helper) { DataMapperHelper.new(:sqlite3) }
+
+  let(:connection) { helper.connection }
+
+  around do |example|
+    helper.setup
+    example.run
+    helper.teardown
+  end
+
+  describe "DM connection adapter monkeypatches" do
+    before { 2.times { User.create } }
+
+    describe "#truncate_table" do
+      it "truncates the table and resets AUTO_INCREMENT index of table" do
+        connection.truncate_table(User.storage_names[:default])
+        expect(User.count).to eq 0
+        expect(User.create.id).to eq 1
+      end
+    end
+  end
+end
diff --git a/adapters/database_cleaner-data_mapper/spec/database_cleaner/data_mapper/truncation_spec.rb b/adapters/database_cleaner-data_mapper/spec/database_cleaner/data_mapper/truncation_spec.rb
new file mode 100644
index 0000000..b879b90
--- /dev/null
+++ b/adapters/database_cleaner-data_mapper/spec/database_cleaner/data_mapper/truncation_spec.rb
@@ -0,0 +1,11 @@
+require 'database_cleaner/data_mapper/truncation'
+require 'database_cleaner/spec'
+
+module DatabaseCleaner
+  module DataMapper
+    RSpec.describe Truncation do
+      it_should_behave_like "a generic strategy"
+      it_should_behave_like "a generic truncation strategy"
+    end
+  end
+end
diff --git a/adapters/database_cleaner-data_mapper/spec/spec_helper.rb b/adapters/database_cleaner-data_mapper/spec/spec_helper.rb
new file mode 100644
index 0000000..4ea635d
--- /dev/null
+++ b/adapters/database_cleaner-data_mapper/spec/spec_helper.rb
@@ -0,0 +1,15 @@
+require "bundler/setup"
+require 'support/data_mapper_helper'
+require "database_cleaner/data_mapper"
+
+RSpec.configure do |config|
+  # Enable flags like --only-failures and --next-failure
+  config.example_status_persistence_file_path = ".rspec_status"
+
+  # Disable RSpec exposing methods globally on `Module` and `main`
+  config.disable_monkey_patching!
+
+  config.expect_with :rspec do |c|
+    c.syntax = :expect
+  end
+end
diff --git a/adapters/database_cleaner-data_mapper/spec/support/data_mapper_helper.rb b/adapters/database_cleaner-data_mapper/spec/support/data_mapper_helper.rb
new file mode 100644
index 0000000..3734828
--- /dev/null
+++ b/adapters/database_cleaner-data_mapper/spec/support/data_mapper_helper.rb
@@ -0,0 +1,36 @@
+require 'database_cleaner/spec/database_helper'
+require "data_mapper"
+require "dm-sqlite-adapter"
+
+class DataMapperHelper < DatabaseCleaner::Spec::DatabaseHelper
+  def setup
+    super
+
+    Kernel.const_set "User", Class.new
+    User.instance_eval do
+      include DataMapper::Resource
+
+      storage_names[:default] = 'users'
+
+      property :id, User::Serial
+      property :name, String
+    end
+  end
+
+  def teardown
+    Kernel.send :remove_const, "User" if defined?(User)
+
+    super
+  end
+
+  def connection
+    DataMapper.repository.adapter
+  end
+
+  private
+
+  def establish_connection(config = default_config)
+    DataMapper.setup(:default, config)
+  end
+end
+
diff --git a/adapters/database_cleaner-data_mapper/spec/support/sample.config.yml b/adapters/database_cleaner-data_mapper/spec/support/sample.config.yml
new file mode 100644
index 0000000..90132c0
--- /dev/null
+++ b/adapters/database_cleaner-data_mapper/spec/support/sample.config.yml
@@ -0,0 +1,34 @@
+mysql:
+  adapter: mysql
+  database: database_cleaner_test
+  username: root
+  password:
+  host: 127.0.0.1
+  port: 3306
+  encoding: utf8
+
+mysql2:
+  adapter: mysql2
+  database: database_cleaner_test
+  username: root
+  password:
+  host: 127.0.0.1
+  port: 3306
+  encoding: utf8
+
+postgres:
+  adapter: postgresql
+  database: database_cleaner_test
+  username: postgres
+  password:
+  host: 127.0.0.1
+  encoding: unicode
+  template: template0
+
+sqlite3:
+  adapter: sqlite3
+  database: tmp/database_cleaner_test.sqlite3
+  pool: 5
+  timeout: 5000
+  encoding: utf8
+
diff --git a/adapters/database_cleaner-data_mapper/tmp/.keep b/adapters/database_cleaner-data_mapper/tmp/.keep
new file mode 100644
index 0000000..e69de29
diff --git a/examples/features/support/env.rb b/examples/features/support/env.rb
index 739f1ed..2ca27d5 100644
--- a/examples/features/support/env.rb
+++ b/examples/features/support/env.rb
@@ -24,19 +24,19 @@ ENV['REDIS_URL_TWO'] = config['two']['url']
 require "active_support/core_ext/string/inflections"
 
 if orm && strategy
+  require "#{File.dirname(__FILE__)}/../../lib/#{orm.downcase}_models"
   if use_gems
     require "database_cleaner-#{orm.underscore}"
   else
     $:.unshift(File.dirname(__FILE__) + '/../../../lib')
     require "database_cleaner"
   end
-  require "#{File.dirname(__FILE__)}/../../lib/#{orm.downcase}_models"
 
   if another_orm
+    require "#{File.dirname(__FILE__)}/../../lib/#{another_orm.downcase}_models"
     if use_gems
       require "database_cleaner-#{another_orm.underscore}"
     end
-    require "#{File.dirname(__FILE__)}/../../lib/#{another_orm.downcase}_models"
   end
 
   require 'database_cleaner/cucumber'
diff --git a/features/cleaning.feature b/features/cleaning.feature
index b3ed9c1..e04a839 100644
--- a/features/cleaning.feature
+++ b/features/cleaning.feature
@@ -16,6 +16,8 @@ Feature: database cleaning
     | ActiveRecord | truncation  |
     | ActiveRecord | deletion    |
     | CouchPotato  | truncation  |
+    | DataMapper   | transaction |
+    | DataMapper   | truncation  |
 
   Scenario Outline: ruby app
     Given I am using <ORM>
diff --git a/features/cleaning_default_strategy.feature b/features/cleaning_default_strategy.feature
index 3e63964..8eac054 100644
--- a/features/cleaning_default_strategy.feature
+++ b/features/cleaning_default_strategy.feature
@@ -14,6 +14,7 @@ Feature: database cleaning
     | ORM          |
     | ActiveRecord |
     | CouchPotato  |
+    | DataMapper   |
 
   Scenario Outline: ruby app
     Given I am using <ORM>
diff --git a/features/cleaning_multiple_dbs.feature b/features/cleaning_multiple_dbs.feature
index 442f9a1..7129814 100644
--- a/features/cleaning_multiple_dbs.feature
+++ b/features/cleaning_multiple_dbs.feature
@@ -15,6 +15,8 @@ Feature: multiple database cleaning
     | ActiveRecord | truncation    |
     | ActiveRecord | deletion      |
     | ActiveRecord | transaction   |
+    | DataMapper   | truncation    |
+    | DataMapper   | transaction   |
 
   Scenario Outline: ruby app
     Given I am using <ORM>
diff --git a/features/cleaning_multiple_orms.feature b/features/cleaning_multiple_orms.feature
index 4900a8c..6e11c21 100644
--- a/features/cleaning_multiple_orms.feature
+++ b/features/cleaning_multiple_orms.feature
@@ -12,7 +12,11 @@ Feature: database cleaning using multiple ORMs
   Examples:
     | ORM1         | ORM2         |
     | ActiveRecord | CouchPotato  |
+    | ActiveRecord | DataMapper   |
     | CouchPotato  | ActiveRecord |
+    | CouchPotato  | DataMapper   |
+    | DataMapper   | ActiveRecord |
+    | DataMapper   | CouchPotato  |
 
   Scenario Outline: ruby app
     Given I am using <ORM1> and <ORM2>