diff --git a/spec/type_aliases/loglevel_spec.rb b/spec/type_aliases/loglevel_spec.rb
new file mode 100644
index 0000000..d0c607d
--- /dev/null
+++ b/spec/type_aliases/loglevel_spec.rb
@@ -0,0 +1,7 @@
+require 'spec_helper'
+
+describe 'Redis::LogLevel' do
+  it { is_expected.to allow_values('debug', 'verbose', 'notice', 'warning') }
+  it { is_expected.not_to allow_value(nil) }
+  it { is_expected.not_to allow_value('') }
+end
diff --git a/spec/type_aliases/redisurl_spec.rb b/spec/type_aliases/redisurl_spec.rb
new file mode 100644
index 0000000..39d3554
--- /dev/null
+++ b/spec/type_aliases/redisurl_spec.rb
@@ -0,0 +1,7 @@
+require 'spec_helper'
+
+describe 'Redis::RedisUrl' do
+  it { is_expected.to allow_value('redis://localhost') }
+  it { is_expected.not_to allow_value(nil) }
+  it { is_expected.not_to allow_value('') }
+end