diff --git a/test/helper.rb b/test/helper.rb
index 7d081260..03ff0e0f 100644
--- a/test/helper.rb
+++ b/test/helper.rb
@@ -31,9 +31,9 @@ Sidekiq.logger.level = Logger::ERROR
 Sidekiq::Test = Minitest::Test
 
 require 'sidekiq/redis_connection'
-redis_url = ENV['REDIS_URL'] || 'redis://localhost/15'
-REDIS = Sidekiq::RedisConnection.create(:url => redis_url, :namespace => 'testy')
+REDIS_URL = ENV['REDIS_URL'] || 'redis://localhost/15'
+REDIS = Sidekiq::RedisConnection.create(:url => REDIS_URL, :namespace => 'testy')
 
 Sidekiq.configure_client do |config|
-  config.redis = { :url => redis_url, :namespace => 'testy' }
+  config.redis = { :url => REDIS_URL, :namespace => 'testy' }
 end
diff --git a/test/test_fetch.rb b/test/test_fetch.rb
index 08aa741a..121cff98 100644
--- a/test/test_fetch.rb
+++ b/test/test_fetch.rb
@@ -4,7 +4,7 @@ require 'sidekiq/fetch'
 class TestFetcher < Sidekiq::Test
   describe 'fetcher' do
     before do
-      Sidekiq.redis = { :namespace => 'fuzzy' }
+      Sidekiq.redis = { :url => REDIS_URL, :namespace => 'fuzzy' }
       Sidekiq.redis do |conn|
         conn.flushdb
         conn.rpush('queue:basic', 'msg')
diff --git a/test/test_redis_connection.rb b/test/test_redis_connection.rb
index fdbcc1eb..4a4eb85f 100644
--- a/test/test_redis_connection.rb
+++ b/test/test_redis_connection.rb
@@ -70,6 +70,14 @@ class TestRedisConnection < Sidekiq::Test
 
   describe ".determine_redis_provider" do
 
+    before do
+      @old_env = ENV.to_hash
+    end
+
+    after do
+      ENV.update(@old_env)
+    end
+
     def with_env_var(var, uri, skip_provider=false)
       vars = ['REDISTOGO_URL', 'REDIS_PROVIDER', 'REDIS_URL'] - [var]
       vars.each do |v|