diff --git a/lib/vmpooler/cloud_dns.rb b/lib/vmpooler/cloud_dns.rb
index ba56b2c..aececce 100644
--- a/lib/vmpooler/cloud_dns.rb
+++ b/lib/vmpooler/cloud_dns.rb
@@ -5,9 +5,10 @@ require 'google/cloud/dns'
 
 module Vmpooler
   class PoolManager
+    # This class interacts with GCP Cloud DNS to create or delete records.
     class CloudDns
       def initialize(project, dns_zone_resource_name)
-        @dns ||= Google::Cloud::Dns.new(project_id: project)
+        @dns = Google::Cloud::Dns.new(project_id: project)
         @dns_zone_resource_name = dns_zone_resource_name
       end
 
diff --git a/spec/unit/providers/gce_spec.rb b/spec/unit/providers/gce_spec.rb
index c893397..c4b8f25 100644
--- a/spec/unit/providers/gce_spec.rb
+++ b/spec/unit/providers/gce_spec.rb
@@ -267,6 +267,7 @@ EOT
         result = MockResult.new
         result.status = 'DONE'
         allow(connection).to receive(:insert_instance).and_return(result)
+        allow(subject).to receive(:dns_setup).and_return(true)
       end
 
       it 'should return a hash' do
@@ -313,6 +314,7 @@ EOT
         result.status = 'DONE'
         allow(subject).to receive(:wait_for_operation).and_return(result)
         allow(connection).to receive(:delete_instance).and_return(result)
+        allow(subject).to receive(:dns_teardown).and_return(true)
       end
 
       it 'should return true' do
@@ -584,6 +586,7 @@ EOT
 
     before(:each) do
       allow(subject).to receive(:connect_to_gce).and_return(connection)
+      allow(subject).to receive(:dns_teardown).and_return(true)
     end
 
     context 'with empty allowlist' do