diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index 213b518..c011d40 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -1,6 +1,6 @@
 # This configuration was generated by
 # `rubocop --auto-gen-config`
-# on 2019-12-03 11:09:29 -0800 using RuboCop version 0.74.0.
+# on 2019-12-03 15:41:39 -0800 using RuboCop version 0.74.0.
 # The point is for the user to remove these configuration records
 # one by one as the offenses are removed from the code base.
 # Note that changes in the inspected code, or installation of new
@@ -8,4 +8,4 @@
 
 # Offense count: 3
 Metrics/AbcSize:
-  Max: 31
+  Max: 34
diff --git a/README.md b/README.md
index 36fd7d7..44d2582 100644
--- a/README.md
+++ b/README.md
@@ -51,13 +51,13 @@ Note that the preservation service is behind a firewall.
 - Preservation::Client.objects.current_version('oo000oo0000')  (can also be 'druid:oo000oo0000')
 - Preservation::Client.objects.checksums(druids: druids) - will return raw csv
 - Preservation::Client.objects.checksums(druids: druids, format: 'json') - will return json
-- Preservation::Client.objects.content('oo000oo0000', 'my_file.pdf') - will return contents of my_file.pdf in most recent version of Moab object
-- Preservation::Client.objects.content('oo000oo0000', 'my_file.pdf', '1') - will return contents of my_file.pdf in version 1 of Moab object
-- Preservation::Client.objects.manifest('oo000oo0000', 'versionInventory.xml') - will return contents of versionInventory.xml in most recent version of Moab object
-- Preservation::Client.objects.manifest('oo000oo0000', 'versionInventory.xml', '3') - will return contents of versionInventory.xml in version 3 of Moab object
-- Preservation::Client.objects.metadata('oo000oo0000', 'identityMetadata.xml') - will return contents of identityMetadata.xml in most recent version of Moab object
-- Preservation::Client.objects.metadata('oo000oo0000', 'identityMetadata.xml', '8') - will return contents of identityMetadata.xml in version 8 of Moab object
-- Preservation::Client.objects.signature_catalog('oo000oo0000') - will return contents of latest version of signatureCatalog.xml from Moab object
+- Preservation::Client.objects.content(druid: 'oo000oo0000', filepath: 'my_file.pdf') - will return contents of my_file.pdf in most recent version of Moab object
+- Preservation::Client.objects.content(druid: 'oo000oo0000', filepath: 'my_file.pdf', version: '1') - will return contents of my_file.pdf in version 1 of Moab object
+- Preservation::Client.objects.manifest(druid: 'oo000oo0000', filepath: 'versionInventory.xml') - will return contents of versionInventory.xml in most recent version of Moab object
+- Preservation::Client.objects.manifest(druid: 'oo000oo0000', filepath: 'versionInventory.xml', version: '3') - will return contents of versionInventory.xml in version 3 of Moab object
+- Preservation::Client.objects.metadata(druid: 'oo000oo0000', filepath: 'identityMetadata.xml') - will return contents of identityMetadata.xml in most recent version of Moab object
+- Preservation::Client.objects.metadata(druid: 'oo000oo0000', filepath: 'identityMetadata.xml', version: '8') - will return contents of identityMetadata.xml in version 8 of Moab object
+- Preservation::Client.objects.signature_catalog(druid: 'oo000oo0000') - will return contents of latest version of signatureCatalog.xml from Moab object
 
 ## Development
 
diff --git a/lib/preservation/client/objects.rb b/lib/preservation/client/objects.rb
index 5357985..249ce3f 100644
--- a/lib/preservation/client/objects.rb
+++ b/lib/preservation/client/objects.rb
@@ -5,16 +5,16 @@ class Client
     # API calls that are about Preserved Objects
     class Objects < VersionedApiService
       # @param [Array] druids - required list of druids with or without prefix: 'druid:ab123cd4567' OR 'ab123cd4567'
-      # @param [String] :resp_format - desired format of the HTTP response (default csv, json also possible)
+      # @param [String] resp_format - desired format of the HTTP response (default csv, json also possible)
       # @return body of HTTP response from Preservation API - the checksums and filesize for each druid
       def checksums(druids: [], resp_format: 'csv')
-        post('objects/checksums', { druids: druids, format: resp_format }, 'checksums')
+        post('objects/checksums', druids: druids, format: resp_format)
       end
 
       # @param [String] druid - with or without prefix: 'druid:ab123cd4567' OR 'ab123cd4567'
       # @return [Integer] the current version of the Preserved Object
       def current_version(druid)
-        resp_body = get_json("objects/#{druid}.json", druid, 'current_version')
+        resp_body = get_json("objects/#{druid}.json", druid)
         resp_body[:current_version]
       end
 
@@ -22,7 +22,7 @@ def current_version(druid)
       # @param [String] druid - with or without prefix: 'druid:ab123cd4567' OR 'ab123cd4567'
       # @param [String] filepath - the path of the file relative to the moab content directory
       # @param [String] version - the version of the file requested (defaults to nil for latest version)
-      def content(druid, filepath, version = nil)
+      def content(druid:, filepath:, version: nil)
         file(druid, 'content', filepath, version)
       end
 
@@ -30,7 +30,7 @@ def content(druid, filepath, version = nil)
       # @param [String] druid - with or without prefix: 'druid:ab123cd4567' OR 'ab123cd4567'
       # @param [String] filepath - the path of the file relative to the moab manifest directory
       # @param [String] version - the version of the file requested (defaults to nil for latest version)
-      def manifest(druid, filepath, version = nil)
+      def manifest(druid:, filepath:, version: nil)
         file(druid, 'manifest', filepath, version)
       end
 
@@ -38,14 +38,14 @@ def manifest(druid, filepath, version = nil)
       # @param [String] druid - with or without prefix: 'druid:ab123cd4567' OR 'ab123cd4567'
       # @param [String] filepath - the path of the file relative to the moab metadata directory
       # @param [String] version - the version of the file requested (defaults to nil for latest version)
-      def metadata(druid, filepath, version = nil)
+      def metadata(druid:, filepath:, version: nil)
         file(druid, 'metadata', filepath, version)
       end
 
       # convenience method for retrieving latest signatureCatalog.xml file from a Moab object
       # @param [String] druid - with or without prefix: 'druid:ab123cd4567' OR 'ab123cd4567'
       def signature_catalog(druid)
-        manifest(druid, 'signatureCatalog.xml')
+        manifest(druid: druid, filepath: 'signatureCatalog.xml')
       end
 
       private
@@ -57,7 +57,7 @@ def signature_catalog(druid)
       # @param [String] version - the version of the file requested (defaults to nil for latest version)
       # @return the retrieved file
       def file(druid, category, filepath, version = nil)
-        get("objects/#{druid}/file", { category: category, filepath: filepath, version: version }, 'file')
+        get("objects/#{druid}/file", category: category, filepath: filepath, version: version)
       end
     end
   end
diff --git a/lib/preservation/client/versioned_api_service.rb b/lib/preservation/client/versioned_api_service.rb
index 9bd74b8..32411d2 100644
--- a/lib/preservation/client/versioned_api_service.rb
+++ b/lib/preservation/client/versioned_api_service.rb
@@ -14,7 +14,7 @@ def initialize(connection:, api_version:)
       attr_reader :connection, :api_version
 
       # @param path [String] path to be appended to connection url (no leading slash)
-      def get_json(path, object_id, caller_method_name)
+      def get_json(path, object_id)
         req_url = api_version.present? ? "#{api_version}/#{path}" : path
         resp = connection.get do |req|
           req.url req_url
@@ -28,7 +28,7 @@ def get_json(path, object_id, caller_method_name)
           raise Preservation::Client::NotFoundError, errmsg
         else
           errmsg = ResponseErrorFormatter
-                   .format(response: resp, object_id: object_id, client_method_name: caller_method_name)
+                   .format(response: resp, object_id: object_id, client_method_name: caller_locations.first.label)
           raise Preservation::Client::UnexpectedResponseError, errmsg
         end
       rescue Faraday::ResourceNotFound => e
@@ -41,13 +41,13 @@ def get_json(path, object_id, caller_method_name)
 
       # @param path [String] path to be appended to connection url (no leading slash)
       # @param params [Hash] optional params
-      def get(path, params, caller_method_name)
+      def get(path, params)
         get_path = api_version.present? ? "#{api_version}/#{path}" : path
         resp = connection.get get_path, params
         return resp.body if resp.success?
 
         errmsg = ResponseErrorFormatter
-                 .format(response: resp, client_method_name: caller_method_name)
+                 .format(response: resp, client_method_name: caller_locations.first.label)
         raise Preservation::Client::UnexpectedResponseError, errmsg
       rescue Faraday::ResourceNotFound => e
         errmsg = "HTTP GET to #{connection.url_prefix}#{path} failed with #{e.class}: #{e.message}"
@@ -59,13 +59,13 @@ def get(path, params, caller_method_name)
 
       # @param path [String] path to be appended to connection url (no leading slash)
       # @param params [Hash] optional params
-      def post(path, params, caller_method_name)
+      def post(path, params)
         post_path = api_version.present? ? "#{api_version}/#{path}" : path
         resp = connection.post post_path, params
         return resp.body if resp.success?
 
         errmsg = ResponseErrorFormatter
-                 .format(response: resp, client_method_name: caller_method_name)
+                 .format(response: resp, client_method_name: caller_locations.first.label)
         raise Preservation::Client::UnexpectedResponseError, errmsg
       rescue Faraday::ResourceNotFound => e
         errmsg = "HTTP POST to #{connection.url_prefix}#{path} failed with #{e.class}: #{e.message}"
diff --git a/spec/preservation/client/objects_spec.rb b/spec/preservation/client/objects_spec.rb
index faa081b..5ecb08f 100644
--- a/spec/preservation/client/objects_spec.rb
+++ b/spec/preservation/client/objects_spec.rb
@@ -29,7 +29,7 @@
       end
 
       before do
-        allow(subject).to receive(:get_json).with(path, druid, 'current_version').and_return(valid_response_body)
+        allow(subject).to receive(:get_json).with(path, druid).and_return(valid_response_body)
       end
 
       it 'returns the current version as an integer' do
@@ -39,7 +39,7 @@
 
     context 'when API request fails' do
       before do
-        allow(subject).to receive(:get_json).with(path, druid, 'current_version').and_raise(Preservation::Client::UnexpectedResponseError, err_msg)
+        allow(subject).to receive(:get_json).with(path, druid).and_raise(Preservation::Client::UnexpectedResponseError, err_msg)
       end
 
       it 'raises an error' do
@@ -64,7 +64,7 @@
       end
 
       before do
-        allow(subject).to receive(:post).with(path, params, 'checksums').and_return(valid_csv_response)
+        allow(subject).to receive(:post).with(path, params).and_return(valid_csv_response)
       end
 
       it 'returns the API response' do
@@ -74,7 +74,7 @@
 
     context 'when API request fails' do
       before do
-        allow(subject).to receive(:post).with(path, params, 'checksums').and_raise(Preservation::Client::UnexpectedResponseError, err_msg)
+        allow(subject).to receive(:post).with(path, params).and_raise(Preservation::Client::UnexpectedResponseError, err_msg)
       end
 
       it 'raises an error' do
@@ -103,11 +103,11 @@
       end
 
       before do
-        allow(subject).to receive(:get).with(file_api_path, file_api_params, 'file').and_return(valid_response_body)
+        allow(subject).to receive(:get).with(file_api_path, file_api_params).and_return(valid_response_body)
       end
 
       it 'returns the content file' do
-        expect(subject.content(file_druid, filename)).to eq valid_response_body
+        expect(subject.content(druid: file_druid, filepath: filename)).to eq valid_response_body
       end
 
       it 'returns the content file for specified version' do
@@ -117,18 +117,18 @@
             filepath: filename,
             version: '6'
           }
-        allow(subject).to receive(:get).with(file_api_path, my_file_api_params, 'file').and_return(valid_response_body)
-        expect(subject.content(file_druid, filename, '6')).to eq valid_response_body
+        allow(subject).to receive(:get).with(file_api_path, my_file_api_params).and_return(valid_response_body)
+        expect(subject.content(druid: file_druid, filepath: filename, version: '6')).to eq valid_response_body
       end
     end
 
     context 'when API request fails' do
       before do
-        allow(subject).to receive(:get).with(file_api_path, file_api_params, 'file').and_raise(Preservation::Client::UnexpectedResponseError, err_msg)
+        allow(subject).to receive(:get).with(file_api_path, file_api_params).and_raise(Preservation::Client::UnexpectedResponseError, err_msg)
       end
 
       it 'raises an error' do
-        expect { subject.content(file_druid, filename) }.to raise_error(Preservation::Client::UnexpectedResponseError, err_msg)
+        expect { subject.content(druid: file_druid, filepath: filename) }.to raise_error(Preservation::Client::UnexpectedResponseError, err_msg)
       end
     end
   end
@@ -155,11 +155,11 @@
       end
 
       before do
-        allow(subject).to receive(:get).with(file_api_path, file_api_params, 'file').and_return(valid_response_body)
+        allow(subject).to receive(:get).with(file_api_path, file_api_params).and_return(valid_response_body)
       end
 
       it 'returns the manifest file' do
-        expect(subject.manifest(file_druid, manifest_filename)).to eq valid_response_body
+        expect(subject.manifest(druid: file_druid, filepath: manifest_filename)).to eq valid_response_body
       end
 
       it 'returns the manifest file for specified version' do
@@ -169,18 +169,18 @@
             filepath: manifest_filename,
             version: '6'
           }
-        allow(subject).to receive(:get).with(file_api_path, my_file_api_params, 'file').and_return(valid_response_body)
-        expect(subject.manifest(file_druid, manifest_filename, '6')).to eq valid_response_body
+        allow(subject).to receive(:get).with(file_api_path, my_file_api_params).and_return(valid_response_body)
+        expect(subject.manifest(druid: file_druid, filepath: manifest_filename, version: '6')).to eq valid_response_body
       end
     end
 
     context 'when API request fails' do
       before do
-        allow(subject).to receive(:get).with(file_api_path, file_api_params, 'file').and_raise(Preservation::Client::UnexpectedResponseError, err_msg)
+        allow(subject).to receive(:get).with(file_api_path, file_api_params).and_raise(Preservation::Client::UnexpectedResponseError, err_msg)
       end
 
       it 'raises an error' do
-        expect { subject.manifest(file_druid, manifest_filename) }.to raise_error(Preservation::Client::UnexpectedResponseError, err_msg)
+        expect { subject.manifest(druid: file_druid, filepath: manifest_filename) }.to raise_error(Preservation::Client::UnexpectedResponseError, err_msg)
       end
     end
   end
@@ -209,11 +209,11 @@
       end
 
       before do
-        allow(subject).to receive(:get).with(file_api_path, file_api_params, 'file').and_return(valid_response_body)
+        allow(subject).to receive(:get).with(file_api_path, file_api_params).and_return(valid_response_body)
       end
 
       it 'returns the metadata file' do
-        expect(subject.metadata(file_druid, metadata_filename)).to eq valid_response_body
+        expect(subject.metadata(druid: file_druid, filepath: metadata_filename)).to eq valid_response_body
       end
 
       it 'returns the metadata file for specified version' do
@@ -223,18 +223,18 @@
             filepath: metadata_filename,
             version: '6'
           }
-        allow(subject).to receive(:get).with(file_api_path, my_file_api_params, 'file').and_return(valid_response_body)
-        expect(subject.metadata(file_druid, metadata_filename, '6')).to eq valid_response_body
+        allow(subject).to receive(:get).with(file_api_path, my_file_api_params).and_return(valid_response_body)
+        expect(subject.metadata(druid: file_druid, filepath: metadata_filename, version: '6')).to eq valid_response_body
       end
     end
 
     context 'when API request fails' do
       before do
-        allow(subject).to receive(:get).with(file_api_path, file_api_params, 'file').and_raise(Preservation::Client::UnexpectedResponseError, err_msg)
+        allow(subject).to receive(:get).with(file_api_path, file_api_params).and_raise(Preservation::Client::UnexpectedResponseError, err_msg)
       end
 
       it 'raises an error' do
-        expect { subject.metadata(file_druid, metadata_filename) }.to raise_error(Preservation::Client::UnexpectedResponseError, err_msg)
+        expect { subject.metadata(druid: file_druid, filepath: metadata_filename) }.to raise_error(Preservation::Client::UnexpectedResponseError, err_msg)
       end
     end
   end
@@ -261,7 +261,7 @@
       end
 
       before do
-        allow(subject).to receive(:get).with(file_api_path, file_api_params, 'file').and_return(valid_response_body)
+        allow(subject).to receive(:get).with(file_api_path, file_api_params).and_return(valid_response_body)
       end
 
       it 'returns the signature catalog file' do
@@ -271,7 +271,7 @@
 
     context 'when API request fails' do
       before do
-        allow(subject).to receive(:get).with(file_api_path, file_api_params, 'file').and_raise(Preservation::Client::UnexpectedResponseError, err_msg)
+        allow(subject).to receive(:get).with(file_api_path, file_api_params).and_raise(Preservation::Client::UnexpectedResponseError, err_msg)
       end
 
       it 'raises an error' do
diff --git a/spec/preservation/client/versioned_api_service_spec.rb b/spec/preservation/client/versioned_api_service_spec.rb
index b708561..61c4b93 100644
--- a/spec/preservation/client/versioned_api_service_spec.rb
+++ b/spec/preservation/client/versioned_api_service_spec.rb
@@ -3,7 +3,6 @@
 RSpec.describe Preservation::Client::VersionedApiService do
   let(:prez_api_url) { 'https://prezcat.example.com' }
   let(:druid) { 'oo000oo0000' }
-  let(:caller_method_name) { 'my_method_name' }
   let(:faraday_err_msg) { 'faraday is sad' }
 
   before do
@@ -27,13 +26,13 @@
     it 'request url includes api_version when it is non-blank' do
       resp_body = JSON.generate(foo: 'have api version')
       stub_request(:get, "#{prez_api_url}/#{api_version}/#{path}").to_return(body: resp_body, status: 200)
-      expect(subject.send(:get_json, path, druid, caller_method_name)).to eq JSON.parse(resp_body)
+      expect(subject.send(:get_json, path, druid)).to eq JSON.parse(resp_body)
     end
     it 'request url has no api_version when it is blank' do
       pc = described_class.new(connection: conn, api_version: '')
       resp_body = JSON.generate(bar: 'blank api version')
       stub_request(:get, "#{prez_api_url}/#{path}").to_return(body: resp_body, status: 200)
-      expect(pc.send(:get_json, path, druid, caller_method_name)).to eq JSON.parse(resp_body)
+      expect(pc.send(:get_json, path, druid)).to eq JSON.parse(resp_body)
     end
 
     context 'when response status success' do
@@ -41,7 +40,7 @@
 
       it 'returns response body' do
         stub_request(:get, "#{prez_api_url}/#{api_version}/#{path}").to_return(body: resp_body, status: 200)
-        expect(subject.send(:get_json, path, druid, caller_method_name)).to eq JSON.parse(resp_body)
+        expect(subject.send(:get_json, path, druid)).to eq JSON.parse(resp_body)
       end
     end
 
@@ -49,11 +48,11 @@
       it '404 status code' do
         stub_request(:get, "#{prez_api_url}/#{api_version}/#{path}").to_return(status: 404)
         exp_msg = "#{druid} not found in Preservation at #{prez_api_url}/#{api_version}/#{path}"
-        expect { subject.send(:get_json, path, druid, caller_method_name) }.to raise_error(Preservation::Client::NotFoundError, exp_msg)
+        expect { subject.send(:get_json, path, druid) }.to raise_error(Preservation::Client::NotFoundError, exp_msg)
       end
       it 'raises Preservation::Client::UnexpectedResponseError with message from ResponseErrorFormatter' do
         stub_request(:get, "#{prez_api_url}/#{api_version}/#{path}").to_return(status: 500)
-        expect { subject.send(:get_json, path, druid, caller_method_name) }.to raise_error(Preservation::Client::UnexpectedResponseError, /got 500/)
+        expect { subject.send(:get_json, path, druid) }.to raise_error(Preservation::Client::UnexpectedResponseError, /got 500/)
       end
     end
 
@@ -61,7 +60,7 @@
       it 'raises Preservation::Client::NotFoundError' do
         allow(conn).to receive(:get).and_raise(Faraday::ResourceNotFound, faraday_err_msg)
         exp_err_msg = "HTTP GET to #{prez_api_url}/#{api_version}/#{path} failed with #{Faraday::ResourceNotFound}: #{faraday_err_msg}"
-        expect { subject.send(:get_json, path, druid, caller_method_name) }.to raise_error(Preservation::Client::NotFoundError, exp_err_msg)
+        expect { subject.send(:get_json, path, druid) }.to raise_error(Preservation::Client::NotFoundError, exp_err_msg)
       end
     end
 
@@ -69,7 +68,7 @@
       it 'raises Preservation::Client::UnexpectedResponseError' do
         allow(conn).to receive(:get).and_raise(Faraday::ParsingError, faraday_err_msg)
         exp_err_msg = "HTTP GET to #{prez_api_url}/#{api_version}/#{path} failed with #{Faraday::ParsingError}: #{faraday_err_msg}"
-        expect { subject.send(:get_json, path, druid, caller_method_name) }.to raise_error(Preservation::Client::UnexpectedResponseError, exp_err_msg)
+        expect { subject.send(:get_json, path, druid) }.to raise_error(Preservation::Client::UnexpectedResponseError, exp_err_msg)
       end
     end
 
@@ -77,7 +76,7 @@
       it 'raises Preservation::Client::UnexpectedResponseError' do
         allow(conn).to receive(:get).and_raise(Faraday::RetriableResponse, faraday_err_msg)
         exp_err_msg = "HTTP GET to #{prez_api_url}/#{api_version}/#{path} failed with #{Faraday::RetriableResponse}: #{faraday_err_msg}"
-        expect { subject.send(:get_json, path, druid, caller_method_name) }.to raise_error(Preservation::Client::UnexpectedResponseError, exp_err_msg)
+        expect { subject.send(:get_json, path, druid) }.to raise_error(Preservation::Client::UnexpectedResponseError, exp_err_msg)
       end
     end
   end
@@ -91,12 +90,12 @@
     it 'request url includes api_version when it is non-blank' do
       stub_request(:get, "#{prez_api_url}/#{api_version}/#{path}?#{params_as_args}")
         .to_return(body: 'have api version', status: 200)
-      expect(subject.send(:get, path, params, caller_method_name)).to eq 'have api version'
+      expect(subject.send(:get, path, params)).to eq 'have api version'
     end
     it 'request url has no api_version when it is blank' do
       pc = described_class.new(connection: conn, api_version: '')
       stub_request(:get, "#{prez_api_url}/#{path}?#{params_as_args}").to_return(body: 'blank api version', status: 200)
-      expect(pc.send(:get, path, params, caller_method_name)).to eq 'blank api version'
+      expect(pc.send(:get, path, params)).to eq 'blank api version'
     end
 
     context 'when response status success' do
@@ -105,14 +104,14 @@
       it 'returns response body' do
         stub_request(:get, "#{prez_api_url}/#{api_version}/#{path}?#{params_as_args}")
           .to_return(body: resp_body, status: 200)
-        expect(subject.send(:get, path, params, caller_method_name)).to eq resp_body
+        expect(subject.send(:get, path, params)).to eq resp_body
       end
     end
 
     context 'when response status NOT success' do
       it 'raises Preservation::Client::UnexpectedResponseError with message from ResponseErrorFormatter' do
         stub_request(:get, "#{prez_api_url}/#{api_version}/#{path}?#{params_as_args}").to_return(status: 500)
-        expect { subject.send(:get, path, params, caller_method_name) }.to raise_error(Preservation::Client::UnexpectedResponseError, /got 500/)
+        expect { subject.send(:get, path, params) }.to raise_error(Preservation::Client::UnexpectedResponseError, /got 500/)
       end
     end
 
@@ -120,7 +119,7 @@
       it 'raises Preservation::Client::NotFoundError' do
         allow(conn).to receive(:get).and_raise(Faraday::ResourceNotFound, faraday_err_msg)
         exp_err_msg = "HTTP GET to #{prez_api_url}/#{path} failed with #{Faraday::ResourceNotFound}: #{faraday_err_msg}"
-        expect { subject.send(:get, path, params, caller_method_name) }.to raise_error(Preservation::Client::NotFoundError, exp_err_msg)
+        expect { subject.send(:get, path, params) }.to raise_error(Preservation::Client::NotFoundError, exp_err_msg)
       end
     end
 
@@ -128,7 +127,7 @@
       it 'raises Preservation::Client::UnexpectedResponseError' do
         allow(conn).to receive(:get).and_raise(Faraday::ParsingError, faraday_err_msg)
         exp_err_msg = "HTTP GET to #{prez_api_url}/#{path} failed with #{Faraday::ParsingError}: #{faraday_err_msg}"
-        expect { subject.send(:get, path, params, caller_method_name) }.to raise_error(Preservation::Client::UnexpectedResponseError, exp_err_msg)
+        expect { subject.send(:get, path, params) }.to raise_error(Preservation::Client::UnexpectedResponseError, exp_err_msg)
       end
     end
 
@@ -136,7 +135,7 @@
       it 'raises Preservation::Client::UnexpectedResponseError' do
         allow(conn).to receive(:get).and_raise(Faraday::RetriableResponse, faraday_err_msg)
         exp_err_msg = "HTTP GET to #{prez_api_url}/#{path} failed with #{Faraday::RetriableResponse}: #{faraday_err_msg}"
-        expect { subject.send(:get, path, params, caller_method_name) }.to raise_error(Preservation::Client::UnexpectedResponseError, exp_err_msg)
+        expect { subject.send(:get, path, params) }.to raise_error(Preservation::Client::UnexpectedResponseError, exp_err_msg)
       end
     end
   end
@@ -149,12 +148,12 @@
 
     it 'request url includes api_version when it is non-blank' do
       stub_request(:post, "#{prez_api_url}/#{api_version}/#{path}").to_return(body: 'have api version', status: 200)
-      expect(subject.send(:post, path, params, caller_method_name)).to eq 'have api version'
+      expect(subject.send(:post, path, params)).to eq 'have api version'
     end
     it 'request url has no api_version when it is blank' do
       pc = described_class.new(connection: conn, api_version: '')
       stub_request(:post, "#{prez_api_url}/#{path}").to_return(body: 'blank api version', status: 200)
-      expect(pc.send(:post, path, params, caller_method_name)).to eq 'blank api version'
+      expect(pc.send(:post, path, params)).to eq 'blank api version'
     end
 
     context 'when response status success' do
@@ -162,14 +161,14 @@
 
       it 'returns response body' do
         stub_request(:post, "#{prez_api_url}/#{api_version}/#{path}").to_return(body: resp_body, status: 200)
-        expect(subject.send(:post, path, params, caller_method_name)).to eq resp_body
+        expect(subject.send(:post, path, params)).to eq resp_body
       end
     end
 
     context 'when response status NOT success' do
       it 'raises Preservation::Client::UnexpectedResponseError with message from ResponseErrorFormatter' do
         stub_request(:post, "#{prez_api_url}/#{api_version}/#{path}").to_return(status: 500)
-        expect { subject.send(:post, path, params, caller_method_name) }.to raise_error(Preservation::Client::UnexpectedResponseError, /got 500/)
+        expect { subject.send(:post, path, params) }.to raise_error(Preservation::Client::UnexpectedResponseError, /got 500/)
       end
     end
 
@@ -177,7 +176,7 @@
       it 'raises Preservation::Client::NotFoundError' do
         allow(conn).to receive(:post).and_raise(Faraday::ResourceNotFound, faraday_err_msg)
         exp_err_msg = "HTTP POST to #{prez_api_url}/#{path} failed with #{Faraday::ResourceNotFound}: #{faraday_err_msg}"
-        expect { subject.send(:post, path, params, caller_method_name) }.to raise_error(Preservation::Client::NotFoundError, exp_err_msg)
+        expect { subject.send(:post, path, params) }.to raise_error(Preservation::Client::NotFoundError, exp_err_msg)
       end
     end
 
@@ -185,7 +184,7 @@
       it 'raises Preservation::Client::UnexpectedResponseError' do
         allow(conn).to receive(:post).and_raise(Faraday::ParsingError, faraday_err_msg)
         exp_err_msg = "HTTP POST to #{prez_api_url}/#{path} failed with #{Faraday::ParsingError}: #{faraday_err_msg}"
-        expect { subject.send(:post, path, params, caller_method_name) }.to raise_error(Preservation::Client::UnexpectedResponseError, exp_err_msg)
+        expect { subject.send(:post, path, params) }.to raise_error(Preservation::Client::UnexpectedResponseError, exp_err_msg)
       end
     end
 
@@ -193,7 +192,7 @@
       it 'raises Preservation::Client::UnexpectedResponseError' do
         allow(conn).to receive(:post).and_raise(Faraday::RetriableResponse, faraday_err_msg)
         exp_err_msg = "HTTP POST to #{prez_api_url}/#{path} failed with #{Faraday::RetriableResponse}: #{faraday_err_msg}"
-        expect { subject.send(:post, path, params, caller_method_name) }.to raise_error(Preservation::Client::UnexpectedResponseError, exp_err_msg)
+        expect { subject.send(:post, path, params) }.to raise_error(Preservation::Client::UnexpectedResponseError, exp_err_msg)
       end
     end
   end