diff --git a/rclcpp/test/test_node.cpp b/rclcpp/test/test_node.cpp
index 1eddeea..213252d 100644
--- a/rclcpp/test/test_node.cpp
+++ b/rclcpp/test/test_node.cpp
@@ -48,20 +48,23 @@ protected:
  */
 TEST_F(TestNode, construction_and_destruction) {
   {
-    std::make_shared<rclcpp::Node>("my_node", "/ns");
+    auto node = std::make_shared<rclcpp::Node>("my_node", "/ns");
+    (void)node;
   }
 
   {
     ASSERT_THROW(
     {
-      std::make_shared<rclcpp::Node>("invalid_node?", "/ns");
+      auto node = std::make_shared<rclcpp::Node>("invalid_node?", "/ns");
+      (void)node;
     }, rclcpp::exceptions::InvalidNodeNameError);
   }
 
   {
     ASSERT_THROW(
     {
-      std::make_shared<rclcpp::Node>("my_node", "/invalid_ns?");
+      auto node = std::make_shared<rclcpp::Node>("my_node", "/invalid_ns?");
+      (void)node;
     }, rclcpp::exceptions::InvalidNamespaceError);
   }
 }
diff --git a/rclcpp/test/test_parameter_client.cpp b/rclcpp/test/test_parameter_client.cpp
index 2630353..4b7aa69 100644
--- a/rclcpp/test/test_parameter_client.cpp
+++ b/rclcpp/test/test_parameter_client.cpp
@@ -69,7 +69,9 @@ TEST_F(TestParameterClient, async_construction_and_destruction) {
   {
     ASSERT_THROW(
     {
-      std::make_shared<rclcpp::AsyncParametersClient>(node, "invalid_remote_node?");
+      auto asynchronous_client =
+        std::make_shared<rclcpp::AsyncParametersClient>(node, "invalid_remote_node?");
+      (void)asynchronous_client;
     }, rclcpp::exceptions::InvalidServiceNameError);
   }
 }
@@ -103,7 +105,9 @@ TEST_F(TestParameterClient, sync_construction_and_destruction) {
   {
     ASSERT_THROW(
     {
-      std::make_shared<rclcpp::SyncParametersClient>(node, "invalid_remote_node?");
+      auto synchronous_client =
+        std::make_shared<rclcpp::SyncParametersClient>(node, "invalid_remote_node?");
+      (void)synchronous_client;
     }, rclcpp::exceptions::InvalidServiceNameError);
   }
 }