diff --git a/src/node_config.cc b/src/node_config.cc
index 7ecf70fdb6256a..6d11f14d78c353 100644
--- a/src/node_config.cc
+++ b/src/node_config.cc
@@ -1,7 +1,7 @@
 #include "env-inl.h"
 #include "node.h"
 #include "node_i18n.h"
-#include "node_options-inl.h"
+#include "node_options.h"
 #include "util-inl.h"
 
 namespace node {
diff --git a/src/node_options-inl.h b/src/node_options-inl.h
index 052c847f7ebdc4..001bdecbb67361 100644
--- a/src/node_options-inl.h
+++ b/src/node_options-inl.h
@@ -213,15 +213,15 @@ auto OptionsParser<Options>::Convert(
 template <typename Options>
 template <typename ChildOptions>
 void OptionsParser<Options>::Insert(
-    const OptionsParser<ChildOptions>* child_options_parser,
+    const OptionsParser<ChildOptions>& child_options_parser,
     ChildOptions* (Options::* get_child)()) {
-  aliases_.insert(child_options_parser->aliases_.begin(),
-                  child_options_parser->aliases_.end());
+  aliases_.insert(std::begin(child_options_parser.aliases_),
+                  std::end(child_options_parser.aliases_));
 
-  for (const auto& pair : child_options_parser->options_)
+  for (const auto& pair : child_options_parser.options_)
     options_.emplace(pair.first, Convert(pair.second, get_child));
 
-  for (const auto& pair : child_options_parser->implications_)
+  for (const auto& pair : child_options_parser.implications_)
     implications_.emplace(pair.first, Convert(pair.second, get_child));
 }
 
diff --git a/src/node_options.cc b/src/node_options.cc
index 206c05797ed86f..1033b1f7e14c29 100644
--- a/src/node_options.cc
+++ b/src/node_options.cc
@@ -1,8 +1,9 @@
-#include <cerrno>
 #include "env-inl.h"
 #include "node_binding.h"
 #include "node_options-inl.h"
 
+#include <cstdlib>  // strtoul, errno
+
 using v8::Boolean;
 using v8::Context;
 using v8::FunctionCallbackInfo;
@@ -112,7 +113,7 @@ class EnvironmentOptionsParser : public OptionsParser<EnvironmentOptions> {
   EnvironmentOptionsParser();
   explicit EnvironmentOptionsParser(const DebugOptionsParser& dop)
     : EnvironmentOptionsParser() {
-    Insert(&dop, &EnvironmentOptions::get_debug_options);
+    Insert(dop, &EnvironmentOptions::get_debug_options);
   }
 };
 
@@ -373,7 +374,7 @@ PerIsolateOptionsParser::PerIsolateOptionsParser(
             kAllowedInEnvironment);
 #endif  // NODE_REPORT
 
-  Insert(&eop, &PerIsolateOptions::get_per_env_options);
+  Insert(eop, &PerIsolateOptions::get_per_env_options);
 }
 
 PerProcessOptionsParser::PerProcessOptionsParser(
@@ -483,7 +484,7 @@ PerProcessOptionsParser::PerProcessOptionsParser(
 #endif
 #endif
 
-  Insert(&iop, &PerProcessOptions::get_per_isolate_options);
+  Insert(iop, &PerProcessOptions::get_per_isolate_options);
 }
 
 inline std::string RemoveBrackets(const std::string& host) {
@@ -497,7 +498,8 @@ inline int ParseAndValidatePort(const std::string& port,
                                 std::vector<std::string>* errors) {
   char* endptr;
   errno = 0;
-  const long result = strtol(port.c_str(), &endptr, 10);  // NOLINT(runtime/int)
+  const unsigned long result =                 // NOLINT(runtime/int)
+    strtoul(port.c_str(), &endptr, 10);
   if (errno != 0 || *endptr != '\0'||
       (result != 0 && result < 1024) || result > 65535) {
     errors->push_back(" must be 0 or in range 1024 to 65535.");
diff --git a/src/node_options.h b/src/node_options.h
index cc91d708ef284b..ccebe070ef3c37 100644
--- a/src/node_options.h
+++ b/src/node_options.h
@@ -300,7 +300,7 @@ class OptionsParser {
   // a method that yields the target options type from this parser's options
   // type.
   template <typename ChildOptions>
-  void Insert(const OptionsParser<ChildOptions>* child_options_parser,
+  void Insert(const OptionsParser<ChildOptions>& child_options_parser,
               ChildOptions* (Options::* get_child)());
 
   // Parse a sequence of options into an options struct, a list of
diff --git a/src/node_process_object.cc b/src/node_process_object.cc
index a7af5e2d32b972..614c9a163f1dc4 100644
--- a/src/node_process_object.cc
+++ b/src/node_process_object.cc
@@ -1,5 +1,3 @@
-#include <climits>  // PATH_MAX
-
 #include "env-inl.h"
 #include "node_internals.h"
 #include "node_options-inl.h"
@@ -8,6 +6,8 @@
 #include "node_revert.h"
 #include "util-inl.h"
 
+#include <climits>  // PATH_MAX
+
 namespace node {
 using v8::Context;
 using v8::DEFAULT;
diff --git a/src/node_worker.cc b/src/node_worker.cc
index e22503863d7db4..5ab4fad5d40114 100644
--- a/src/node_worker.cc
+++ b/src/node_worker.cc
@@ -487,13 +487,13 @@ void Worker::New(const FunctionCallbackInfo<Value>& args) {
       // The first argument is program name.
       invalid_args.erase(invalid_args.begin());
       if (errors.size() > 0 || invalid_args.size() > 0) {
-        v8::Local<v8::Value> value =
+        v8::Local<v8::Value> error =
             ToV8Value(env->context(),
                       errors.size() > 0 ? errors : invalid_args)
                 .ToLocalChecked();
         Local<String> key =
             FIXED_ONE_BYTE_STRING(env->isolate(), "invalidExecArgv");
-        args.This()->Set(env->context(), key, value).FromJust();
+        USE(args.This()->Set(env->context(), key, error).FromJust());
         return;
       }
     }