diff --git a/src/ClientConfig.cc b/src/ClientConfig.cc
index f0d24ef2..1b11c76e 100644
--- a/src/ClientConfig.cc
+++ b/src/ClientConfig.cc
@@ -240,9 +240,9 @@ ClientConfig::ClientConfig(const ClientConfig &_copy)
 }
 
 //////////////////////////////////////////////////
-ClientConfig &ClientConfig::operator=(const ClientConfig &_rhs)
+ClientConfig &ClientConfig::operator=(const ClientConfig &_copy)
 {
-  *(this->dataPtr) = *(_rhs.dataPtr);
+  *(this->dataPtr) = *(_copy.dataPtr);
 
   return *this;
 }
@@ -526,7 +526,7 @@ std::string ClientConfig::AsString(const std::string &_prefix) const
       << _prefix << "Cache location: " << this->CacheLocation() << std::endl
       << _prefix << "Servers:" << std::endl;
 
-  for (auto s : this->Servers())
+  for (const auto &s : this->Servers())
   {
     out << _prefix << "  ---" << std::endl;
     out << _prefix << s.AsString("  ");
diff --git a/src/FuelClient.cc b/src/FuelClient.cc
index d7acdea7..a30feaaa 100644
--- a/src/FuelClient.cc
+++ b/src/FuelClient.cc
@@ -530,7 +530,7 @@ void FuelClient::AddServerConfigParametersToHeaders(
   std::vector<std::string> &_headers) const
 {
   bool privateTokenDefined = false;
-  for (auto header : _headers)
+  for (const auto &header : _headers)
   {
     if (header.find("Private-token:") != std::string::npos)
     {
@@ -627,7 +627,7 @@ Result FuelClient::DownloadModel(const ModelIdentifier &_id,
   if(!res)
     return res;
 
-  for (ModelIdentifier dep : dependencies)
+  for (const ModelIdentifier &dep : dependencies)
   {
     // Download dependency if not in the local cache
     if (!this->dataPtr->cache->MatchingModel(dep))
@@ -787,7 +787,7 @@ Result FuelClient::ModelDependencies(
     std::vector<ModelIdentifier> &_dependencies)
 {
   std::vector<ModelIdentifier> newDeps;
-  for (auto modelId : _ids)
+  for (const auto &modelId : _ids)
   {
     std::vector<ModelIdentifier> modelDeps;
     auto result = this->ModelDependencies(modelId, modelDeps);
@@ -946,7 +946,7 @@ std::vector<FuelClient::ModelResult> FuelClient::DownloadModels(
         std::lock_guard<std::mutex> lock(idsMutex);
         gzdbg << "Adding " << dependencies.size()
           << " model dependencies to queue from " << id.Name() << "\n";
-        for (auto dep : dependencies)
+        for (const auto &dep : dependencies)
         {
           if (uniqueIds.count(dep) == 0)
           {
@@ -1191,15 +1191,15 @@ bool FuelClient::ParseWorldUrl(const common::URI &_worldUrl,
 }
 
 //////////////////////////////////////////////////
-bool FuelClient::ParseModelFileUrl(const common::URI &_fileUrl,
+bool FuelClient::ParseModelFileUrl(const common::URI &_modelFileUrl,
     ModelIdentifier &_id, std::string &_filePath)
 {
-  if (!_fileUrl.Valid())
+  if (!_modelFileUrl.Valid())
     return false;
 
-  this->dataPtr->CheckForDeprecatedUri(_fileUrl);
+  this->dataPtr->CheckForDeprecatedUri(_modelFileUrl);
 
-  auto urlStr = _fileUrl.Str();
+  auto urlStr = _modelFileUrl.Str();
 
   std::smatch match;
   std::string scheme;
@@ -1262,13 +1262,13 @@ bool FuelClient::ParseModelFileUrl(const common::URI &_fileUrl,
 }
 
 //////////////////////////////////////////////////
-bool FuelClient::ParseWorldFileUrl(const common::URI &_fileUrl,
+bool FuelClient::ParseWorldFileUrl(const common::URI &_worldFileUrl,
     WorldIdentifier &_id, std::string &_filePath)
 {
-  if (!_fileUrl.Valid())
+  if (!_worldFileUrl.Valid())
     return false;
 
-  auto urlStr = _fileUrl.Str();
+  auto urlStr = _worldFileUrl.Str();
 
   std::smatch match;
   std::string scheme;
@@ -1935,7 +1935,7 @@ void FuelClientPrivate::CheckForDeprecatedUri(const common::URI &_uri)
   {
     std::string newUrl = _uri.Str();
     newUrl.replace(ignFuelPos, oldServer.size(), "fuel.gazebosim.org");
-    ignwarn << "The " << oldServer << " URL is deprecrated. Pleasse change "
+    gzwarn << "The " << oldServer << " URL is deprecrated. Pleasse change "
       << _uri.Str() << " to " << newUrl << std::endl;
   }
 }
@@ -1959,7 +1959,7 @@ void FuelClientPrivate::ZipFromResponse(const RestResponse &_resp,
       // Check for valid URI
       if (common::URI::Valid(linkUri))
       {
-        igndbg << "Downloading from a referral link [" << linkUri << "]\n";
+        gzdbg << "Downloading from a referral link [" << linkUri << "]\n";
         // Get the zip data.
         RestResponse linkResp = rest.Request(HttpMethod::GET,
             // URL
@@ -1979,7 +1979,7 @@ void FuelClientPrivate::ZipFromResponse(const RestResponse &_resp,
       }
       else
       {
-        ignerr << "Invalid referral link URI [" << linkUri << "]. "
+        gzerr << "Invalid referral link URI [" << linkUri << "]. "
           << "Unable to download.\n";
       }
     }
@@ -1992,7 +1992,7 @@ void FuelClientPrivate::ZipFromResponse(const RestResponse &_resp,
     }
     else
     {
-      ignerr << "Invalid content-type of [" << contentTypeIter->second << "]. "
+      gzerr << "Invalid content-type of [" << contentTypeIter->second << "]. "
         << "Unable to download.\n";
     }
   }
diff --git a/src/Interface.cc b/src/Interface.cc
index d2c5e82e..c1c9412a 100644
--- a/src/Interface.cc
+++ b/src/Interface.cc
@@ -140,7 +140,7 @@ namespace gz
           if (!basename.empty() && basename.find(".sdf") != std::string::npos)
           {
             std::string extension = basename.substr(
-                basename.find_last_of(".") + 1);
+                basename.find_last_of('.') + 1);
             if (extension == "sdf")
               return *dirIter;
           }
diff --git a/src/Model.cc b/src/Model.cc
index 5d760fdb..90f85560 100644
--- a/src/Model.cc
+++ b/src/Model.cc
@@ -24,9 +24,8 @@
 
 #include "ModelPrivate.hh"
 
-namespace ignft = gz::fuel_tools;
 using namespace gz;
-using namespace ignft;
+using namespace fuel_tools;
 
 //////////////////////////////////////////////////
 Model::Model() : dataPtr(nullptr)
diff --git a/src/ModelIdentifier.cc b/src/ModelIdentifier.cc
index 2e96c43f..45df4b4d 100644
--- a/src/ModelIdentifier.cc
+++ b/src/ModelIdentifier.cc
@@ -174,10 +174,10 @@ bool ModelIdentifier::SetName(const std::string &_name)
 }
 
 //////////////////////////////////////////////////
-bool ModelIdentifier::SetOwner(const std::string &_owner)
+bool ModelIdentifier::SetOwner(const std::string &_name)
 {
   bool success = false;
-  std::string owner = common::lowercase(_owner);
+  std::string owner = common::lowercase(_name);
   if (this->dataPtr->ValidName(owner))
   {
     success = true;
diff --git a/src/Model_TEST.cc b/src/Model_TEST.cc
index 620341d3..a30502da 100644
--- a/src/Model_TEST.cc
+++ b/src/Model_TEST.cc
@@ -18,9 +18,8 @@
 #include <gtest/gtest.h>
 #include "gz/fuel_tools/Model.hh"
 
-namespace ignft = gz::fuel_tools;
 using namespace gz;
-using namespace ignft;
+using namespace fuel_tools;
 
 /////////////////////////////////////////////////
 /// \brief Nothing crashes
diff --git a/src/WorldIdentifier.cc b/src/WorldIdentifier.cc
index 38697476..9c9296a0 100644
--- a/src/WorldIdentifier.cc
+++ b/src/WorldIdentifier.cc
@@ -106,9 +106,9 @@ std::string WorldIdentifier::Owner() const
 }
 
 //////////////////////////////////////////////////
-bool WorldIdentifier::SetOwner(const std::string &_owner)
+bool WorldIdentifier::SetOwner(const std::string &_name)
 {
-  this->dataPtr->owner = common::lowercase(_owner);
+  this->dataPtr->owner = common::lowercase(_name);
   return true;
 }
 
@@ -177,9 +177,9 @@ std::string WorldIdentifier::LocalPath() const
 }
 
 //////////////////////////////////////////////////
-bool WorldIdentifier::SetLocalPath(const std::string &_localPath)
+bool WorldIdentifier::SetLocalPath(const std::string &_path)
 {
-  this->dataPtr->localPath = _localPath;
+  this->dataPtr->localPath = _path;
   return true;
 }