diff --git a/lib/sequencer/unit/import/common/model/attributes/remote_id.rb b/lib/sequencer/unit/import/common/model/attributes/remote_id.rb
index 412fbb773..ca2dae12c 100644
--- a/lib/sequencer/unit/import/common/model/attributes/remote_id.rb
+++ b/lib/sequencer/unit/import/common/model/attributes/remote_id.rb
@@ -12,7 +12,7 @@ class Sequencer
 
               def process
                 state.provide(:remote_id) do
-                  resource.fetch(attribute)
+                  resource.fetch(attribute).dup.to_s.downcase
                 end
               rescue KeyError => e
                 handle_failure(e)
diff --git a/spec/lib/sequencer/unit/import/common/model/attributes/remote_id_spec.rb b/spec/lib/sequencer/unit/import/common/model/attributes/remote_id_spec.rb
new file mode 100644
index 000000000..b82648474
--- /dev/null
+++ b/spec/lib/sequencer/unit/import/common/model/attributes/remote_id_spec.rb
@@ -0,0 +1,70 @@
+require 'rails_helper'
+
+RSpec.describe Sequencer::Unit::Import::Common::Model::Attributes::RemoteId, sequencer: :unit do
+
+  it 'takes remote_id from id' do
+    parameters = {
+      resource: {
+        id: '123abc',
+      }
+    }
+
+    provided = process(parameters)
+
+    expect(provided).to include(remote_id: '123abc')
+  end
+
+  it 'takes remote_id from attribute method result' do
+    parameters = {
+      resource: {
+        other_attribute: '123abc',
+      }
+    }
+
+    provided = process(parameters) do |instance|
+      expect(instance).to receive(:attribute).and_return(:other_attribute)
+    end
+
+    expect(provided).to include(remote_id: '123abc')
+  end
+
+  it 'converts value to a String' do
+    parameters = {
+      resource: {
+        id: 1337,
+      }
+    }
+
+    provided = process(parameters)
+
+    expect(provided).to include(remote_id: '1337')
+  end
+
+  it 'downcases the value to prevent case sensivity issues with the ORM' do
+    parameters = {
+      resource: {
+        id: 'AbCdEfG',
+      }
+    }
+
+    provided = process(parameters)
+
+    expect(provided[:remote_id]).to eq(parameters[:resource][:id].downcase)
+  end
+
+  it 'duplicates the value to prevent attribute changes' do
+    parameters = {
+      resource: {
+        id: 'this is',
+      }
+    }
+
+    provided = process(parameters)
+
+    expect(provided[:remote_id]).to eq(parameters[:resource][:id])
+
+    parameters[:resource][:id] += ' a test'
+
+    expect(provided[:remote_id]).not_to eq(parameters[:resource][:id])
+  end
+end
diff --git a/spec/lib/sequencer/unit/import/common/model/external_sync/lookup_spec.rb b/spec/lib/sequencer/unit/import/common/model/external_sync/lookup_spec.rb
new file mode 100644
index 000000000..58c33b2bd
--- /dev/null
+++ b/spec/lib/sequencer/unit/import/common/model/external_sync/lookup_spec.rb
@@ -0,0 +1,25 @@
+require 'rails_helper'
+
+RSpec.describe Sequencer::Unit::Import::Common::Model::ExternalSync::Lookup, sequencer: :unit do
+
+  it 'finds model_class instances by remote_id' do
+    user                 = create(:user)
+    external_sync_source = 'test'
+    remote_id            = '1337'
+
+    ExternalSync.create(
+      source:    external_sync_source,
+      source_id: remote_id,
+      o_id:      user.id,
+      object:    user.class,
+    )
+
+    provided = process(
+      remote_id:            remote_id,
+      model_class:          user.class,
+      external_sync_source: external_sync_source,
+    )
+
+    expect(provided[:instance]).to eq(user)
+  end
+end