diff --git a/spec/zoho_hub/base_record_spec.rb b/spec/zoho_hub/base_record_spec.rb
index 5201f7f..7ded44a 100644
--- a/spec/zoho_hub/base_record_spec.rb
+++ b/spec/zoho_hub/base_record_spec.rb
@@ -81,7 +81,7 @@
         record = test_class.new(response.data.first)
 
         expect(record.my_string).to eq('')
-        expect(record.my_bool).to eq(false)
+        expect(record.my_bool).to be(false)
       end
     end
   end
diff --git a/spec/zoho_hub/connection_spec.rb b/spec/zoho_hub/connection_spec.rb
index 31d9303..0699c08 100644
--- a/spec/zoho_hub/connection_spec.rb
+++ b/spec/zoho_hub/connection_spec.rb
@@ -107,7 +107,7 @@
         expect(connection.access_token).to eq('foo')
         expect do
           connection
-            .send(:with_refresh) { instance_double('Response', body: invalid_http_response) }
+            .send(:with_refresh) { instance_double(Response, body: invalid_http_response) }
         end.to change(connection, :access_token).to eq('123')
       end
 
@@ -118,7 +118,7 @@
           expect(connection.access_token).to eq('bar')
           expect do
             connection
-              .send(:with_refresh) { instance_double('Response', body: invalid_http_response) }
+              .send(:with_refresh) { instance_double(Response, body: invalid_http_response) }
           end.not_to change(connection, :access_token)
           expect(connection.access_token).to eq('bar')
         end
@@ -136,7 +136,7 @@
         it 'ensures to always use the current access token value' do
           expect(adapter.headers['Authorization']).to eq('Zoho-oauthtoken bar123')
           connection.send(:with_refresh) do
-            instance_double('Response', body: { data: [{ code: nil }] })
+            instance_double(Response, body: { data: [{ code: nil }] })
           end
           expect(adapter.headers['Authorization']).to eq('Zoho-oauthtoken bar456')
         end
diff --git a/spec/zoho_hub/with_attributes_spec.rb b/spec/zoho_hub/with_attributes_spec.rb
index 184da02..9754d0c 100644
--- a/spec/zoho_hub/with_attributes_spec.rb
+++ b/spec/zoho_hub/with_attributes_spec.rb
@@ -48,7 +48,7 @@
       test.assign_attributes(one: 1, two: 2)
       expect(test.one).to eq(1)
       expect(test.two).to eq(2)
-      expect(test.three).to eq(nil)
+      expect(test.three).to be_nil
     end
   end
 end
diff --git a/spec/zoho_hub_spec.rb b/spec/zoho_hub_spec.rb
index 1f85934..ebf3a6b 100644
--- a/spec/zoho_hub_spec.rb
+++ b/spec/zoho_hub_spec.rb
@@ -2,7 +2,7 @@
 
 RSpec.describe ZohoHub do
   it 'has a version number' do
-    expect(ZohoHub::VERSION).not_to be nil
+    expect(ZohoHub::VERSION).not_to be_nil
   end
 
   describe '#on_initialize_connection' do