diff --git a/spec/lib/fabricio/authorization/file_param_storage_spec.rb b/spec/lib/fabricio/authorization/file_param_storage_spec.rb
new file mode 100644
index 0000000..0c3e440
--- /dev/null
+++ b/spec/lib/fabricio/authorization/file_param_storage_spec.rb
@@ -0,0 +1,29 @@
+require 'rspec'
+require 'fabricio/authorization/file_session_storage'
+require 'fabricio/authorization/file_param_storage'
+
+describe 'FileParamStorage' do
+  let(:path) { '/path/to/params.yml' }
+  let(:yaml) do
+    yaml = <<-YAML
+    organization_id: my_organization
+    app_id: my_app
+    YAML
+    YAML.load(yaml)
+  end
+
+  before(:each) do
+    allow(YAML).to receive(:load_file).with(path).and_return(yaml)
+    allow(File).to receive(:exist?).with(path).and_return(true)
+    @storage = Fabricio::Authorization::FileParamStorage.new(path)
+  end
+
+  describe '#organization_id' do
+    it { expect(@storage.organization_id).to eq('my_organization') }
+  end
+
+  describe '#app_id' do
+    it { expect(@storage.app_id).to eq('my_app') }
+  end
+end
+