diff --git a/hardware_interface_testing/CMakeLists.txt b/hardware_interface_testing/CMakeLists.txt
index 8e88a677bf..ec6d591dee 100644
--- a/hardware_interface_testing/CMakeLists.txt
+++ b/hardware_interface_testing/CMakeLists.txt
@@ -20,18 +20,18 @@ foreach(Dependency IN ITEMS ${THIS_PACKAGE_INCLUDE_DEPENDS})
 endforeach()
 
 add_library(test_components SHARED
-test/test_components/test_actuator.cpp
-test/test_components/test_sensor.cpp
-test/test_components/test_system.cpp)
+  test/test_components/test_actuator.cpp
+  test/test_components/test_sensor.cpp
+  test/test_components/test_system.cpp
+)
 ament_target_dependencies(test_components hardware_interface pluginlib ros2_control_test_assets)
 install(TARGETS test_components
-DESTINATION lib
+  DESTINATION lib
 )
 pluginlib_export_plugin_description_file(
 hardware_interface test/test_components/test_components.xml)
 
 if(BUILD_TESTING)
-
   find_package(ament_cmake_gmock REQUIRED)
 
   ament_add_gmock(test_resource_manager test/test_resource_manager.cpp)
diff --git a/hardware_interface_testing/test/test_resource_manager.cpp b/hardware_interface_testing/test/test_resource_manager.cpp
index 90b2643d7f..90129f9f64 100644
--- a/hardware_interface_testing/test/test_resource_manager.cpp
+++ b/hardware_interface_testing/test/test_resource_manager.cpp
@@ -232,73 +232,73 @@ TEST_F(ResourceManagerTest, resource_claiming)
   // Activate components to get all interfaces available
   activate_components(rm);
 
-  const auto key = "joint1/position";
-  EXPECT_TRUE(rm.command_interface_is_available(key));
-  EXPECT_FALSE(rm.command_interface_is_claimed(key));
+  const auto command_interface = "joint1/position";
+  EXPECT_TRUE(rm.command_interface_is_available(command_interface));
+  EXPECT_FALSE(rm.command_interface_is_claimed(command_interface));
 
   {
-    auto position_command_interface = rm.claim_command_interface(key);
-    EXPECT_TRUE(rm.command_interface_is_available(key));
-    EXPECT_TRUE(rm.command_interface_is_claimed(key));
+    auto position_command_interface = rm.claim_command_interface(command_interface);
+    EXPECT_TRUE(rm.command_interface_is_available(command_interface));
+    EXPECT_TRUE(rm.command_interface_is_claimed(command_interface));
     {
-      EXPECT_ANY_THROW(rm.claim_command_interface(key));
-      EXPECT_TRUE(rm.command_interface_is_available(key));
+      EXPECT_ANY_THROW(rm.claim_command_interface(command_interface));
+      EXPECT_TRUE(rm.command_interface_is_available(command_interface));
     }
   }
-  EXPECT_TRUE(rm.command_interface_is_available(key));
-  EXPECT_FALSE(rm.command_interface_is_claimed(key));
+  EXPECT_TRUE(rm.command_interface_is_available(command_interface));
+  EXPECT_FALSE(rm.command_interface_is_claimed(command_interface));
 
   // command interfaces can only be claimed once
-  for (const auto & key :
+  for (const auto & interface_key :
        {"joint1/position", "joint1/position", "joint1/position", "joint2/velocity",
         "joint3/velocity"})
   {
     {
-      auto interface = rm.claim_command_interface(key);
-      EXPECT_TRUE(rm.command_interface_is_available(key));
-      EXPECT_TRUE(rm.command_interface_is_claimed(key));
+      auto interface = rm.claim_command_interface(interface_key);
+      EXPECT_TRUE(rm.command_interface_is_available(interface_key));
+      EXPECT_TRUE(rm.command_interface_is_claimed(interface_key));
       {
-        EXPECT_ANY_THROW(rm.claim_command_interface(key));
-        EXPECT_TRUE(rm.command_interface_is_available(key));
+        EXPECT_ANY_THROW(rm.claim_command_interface(interface_key));
+        EXPECT_TRUE(rm.command_interface_is_available(interface_key));
       }
     }
-    EXPECT_TRUE(rm.command_interface_is_available(key));
-    EXPECT_FALSE(rm.command_interface_is_claimed(key));
+    EXPECT_TRUE(rm.command_interface_is_available(interface_key));
+    EXPECT_FALSE(rm.command_interface_is_claimed(interface_key));
   }
 
   // TODO(destogl): This claim test is not true.... can not be...
   // state interfaces can be claimed multiple times
-  for (const auto & key :
+  for (const auto & interface_key :
        {"joint1/position", "joint1/velocity", "sensor1/velocity", "joint2/position",
         "joint3/position"})
   {
     {
-      EXPECT_TRUE(rm.state_interface_is_available(key));
-      auto interface = rm.claim_state_interface(key);
+      EXPECT_TRUE(rm.state_interface_is_available(interface_key));
+      auto interface = rm.claim_state_interface(interface_key);
       {
-        EXPECT_TRUE(rm.state_interface_is_available(key));
-        EXPECT_NO_THROW(rm.claim_state_interface(key));
+        EXPECT_TRUE(rm.state_interface_is_available(interface_key));
+        EXPECT_NO_THROW(rm.claim_state_interface(interface_key));
       }
     }
   }
 
   std::vector<hardware_interface::LoanedCommandInterface> interfaces;
   const auto interface_names = {"joint1/position", "joint2/velocity", "joint3/velocity"};
-  for (const auto & key : interface_names)
+  for (const auto & interface : interface_names)
   {
-    EXPECT_TRUE(rm.command_interface_is_available(key));
-    interfaces.emplace_back(rm.claim_command_interface(key));
+    EXPECT_TRUE(rm.command_interface_is_available(interface));
+    interfaces.emplace_back(rm.claim_command_interface(interface));
   }
-  for (const auto & key : interface_names)
+  for (const auto & interface : interface_names)
   {
-    EXPECT_TRUE(rm.command_interface_is_available(key));
-    EXPECT_TRUE(rm.command_interface_is_claimed(key));
+    EXPECT_TRUE(rm.command_interface_is_available(interface));
+    EXPECT_TRUE(rm.command_interface_is_claimed(interface));
   }
   interfaces.clear();
-  for (const auto & key : interface_names)
+  for (const auto & interface : interface_names)
   {
-    EXPECT_TRUE(rm.command_interface_is_available(key));
-    EXPECT_FALSE(rm.command_interface_is_claimed(key));
+    EXPECT_TRUE(rm.command_interface_is_available(interface));
+    EXPECT_FALSE(rm.command_interface_is_claimed(interface));
   }
 }