diff --git a/src/node.cc b/src/node.cc
index cd9de349bc70e9..953ac31eef5e6e 100644
--- a/src/node.cc
+++ b/src/node.cc
@@ -2460,7 +2460,7 @@ void ProcessArgv(std::vector<std::string>* args,
                  bool is_env) {
   // Parse a few arguments which are specific to Node.
   std::vector<std::string> v8_args;
-  std::string error;
+  std::vector<std::string> errors{};
 
   {
     // TODO(addaleax): The mutex here should ideally be held during the
@@ -2472,11 +2472,13 @@ void ProcessArgv(std::vector<std::string>* args,
         &v8_args,
         per_process_opts.get(),
         is_env ? kAllowedInEnvironment : kDisallowedInEnvironment,
-        &error);
+        &errors);
   }
 
-  if (!error.empty()) {
-    fprintf(stderr, "%s: %s\n", args->at(0).c_str(), error.c_str());
+  if (!errors.empty()) {
+    for (auto const& error : errors) {
+      fprintf(stderr, "%s: %s\n", args->at(0).c_str(), error.c_str());
+    }
     exit(9);
   }
 
@@ -2493,30 +2495,7 @@ void ProcessArgv(std::vector<std::string>* args,
   for (const std::string& cve : per_process_opts->security_reverts)
     Revert(cve.c_str());
 
-  // TODO(addaleax): Move this validation to the option parsers.
   auto env_opts = per_process_opts->per_isolate->per_env;
-  if (!env_opts->userland_loader.empty() &&
-      !env_opts->experimental_modules) {
-    fprintf(stderr, "%s: --loader requires --experimental-modules be enabled\n",
-            args->at(0).c_str());
-    exit(9);
-  }
-
-  if (env_opts->syntax_check_only && env_opts->has_eval_string) {
-    fprintf(stderr, "%s: either --check or --eval can be used, not both\n",
-            args->at(0).c_str());
-    exit(9);
-  }
-
-#if HAVE_OPENSSL
-  if (per_process_opts->use_openssl_ca && per_process_opts->use_bundled_ca) {
-    fprintf(stderr, "%s: either --use-openssl-ca or --use-bundled-ca can be "
-                    "used, not both\n",
-            args->at(0).c_str());
-    exit(9);
-  }
-#endif
-
   if (std::find(v8_args.begin(), v8_args.end(),
                 "--abort-on-uncaught-exception") != v8_args.end() ||
       std::find(v8_args.begin(), v8_args.end(),
diff --git a/src/node_options-inl.h b/src/node_options-inl.h
index ba18e7c19b03c7..1d1eda54751a8f 100644
--- a/src/node_options-inl.h
+++ b/src/node_options-inl.h
@@ -270,7 +270,7 @@ void OptionsParser<Options>::Parse(
     std::vector<std::string>* const v8_args,
     Options* const options,
     OptionEnvvarSettings required_env_settings,
-    std::string* const error) {
+    std::vector<std::string>* const errors) {
   ArgsInfo args(orig_args, exec_args);
 
   // The first entry is the process name. Make sure it ends up in the V8 argv,
@@ -279,7 +279,7 @@ void OptionsParser<Options>::Parse(
   if (v8_args->empty())
     v8_args->push_back(args.program_name());
 
-  while (!args.empty() && error->empty()) {
+  while (!args.empty() && errors->empty()) {
     if (args.first().size() <= 1 || args.first()[0] != '-') break;
 
     // We know that we're either going to consume this
@@ -288,7 +288,7 @@ void OptionsParser<Options>::Parse(
 
     if (arg == "--") {
       if (required_env_settings == kAllowedInEnvironment)
-        *error = NotAllowedInEnvErr("--");
+        errors->push_back(NotAllowedInEnvErr("--"));
       break;
     }
 
@@ -357,7 +357,7 @@ void OptionsParser<Options>::Parse(
     if ((it == options_.end() ||
          it->second.env_setting == kDisallowedInEnvironment) &&
         required_env_settings == kAllowedInEnvironment) {
-      *error = NotAllowedInEnvErr(original_name);
+      errors->push_back(NotAllowedInEnvErr(original_name));
       break;
     }
 
@@ -379,7 +379,7 @@ void OptionsParser<Options>::Parse(
         value = arg.substr(equals_index + 1);
         if (value.empty()) {
         missing_argument:
-          *error = RequiresArgumentErr(original_name);
+          errors->push_back(RequiresArgumentErr(original_name));
           break;
         }
       } else {
@@ -413,7 +413,7 @@ void OptionsParser<Options>::Parse(
         break;
       case kHostPort:
         Lookup<HostPort>(info.field, options)
-            ->Update(SplitHostPort(value, error));
+            ->Update(SplitHostPort(value, errors));
         break;
       case kNoOp:
         break;
@@ -424,6 +424,7 @@ void OptionsParser<Options>::Parse(
         UNREACHABLE();
     }
   }
+  options->CheckOptions(errors);
 }
 
 }  // namespace options_parser
diff --git a/src/node_options.cc b/src/node_options.cc
index 1a614d0e771a8a..156ea11fe91ef0 100644
--- a/src/node_options.cc
+++ b/src/node_options.cc
@@ -16,6 +16,32 @@ using v8::Undefined;
 using v8::Value;
 
 namespace node {
+
+void PerProcessOptions::CheckOptions(std::vector<std::string>* errors) {
+#if HAVE_OPENSSL
+  if (use_openssl_ca && use_bundled_ca) {
+    errors->push_back("either --use-openssl-ca or --use-bundled-ca can be "
+                      "used, not both");
+  }
+#endif
+  per_isolate->CheckOptions(errors);
+}
+
+void PerIsolateOptions::CheckOptions(std::vector<std::string>* errors) {
+  per_env->CheckOptions(errors);
+}
+
+void EnvironmentOptions::CheckOptions(std::vector<std::string>* errors) {
+  if (!userland_loader.empty() && !experimental_modules) {
+    errors->push_back("--loader requires --experimental-modules be enabled");
+  }
+
+  if (syntax_check_only && has_eval_string) {
+    errors->push_back("either --check or --eval can be used, not both");
+  }
+  debug_options->CheckOptions(errors);
+}
+
 namespace options_parser {
 
 // XXX: If you add an option here, please also add it to doc/node.1 and
@@ -305,18 +331,20 @@ inline std::string RemoveBrackets(const std::string& host) {
     return host;
 }
 
-inline int ParseAndValidatePort(const std::string& port, std::string* error) {
+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)
   if (errno != 0 || *endptr != '\0'||
       (result != 0 && result < 1024) || result > 65535) {
-    *error = "Port must be 0 or in range 1024 to 65535.";
+    errors->push_back(" must be 0 or in range 1024 to 65535.");
   }
   return static_cast<int>(result);
 }
 
-HostPort SplitHostPort(const std::string& arg, std::string* error) {
+HostPort SplitHostPort(const std::string& arg,
+                      std::vector<std::string>* errors) {
   // remove_brackets only works if no port is specified
   // so if it has an effect only an IPv6 address was specified.
   std::string host = RemoveBrackets(arg);
@@ -332,11 +360,11 @@ HostPort SplitHostPort(const std::string& arg, std::string* error) {
         return HostPort { arg, -1 };
       }
     }
-    return HostPort { "", ParseAndValidatePort(arg, error) };
+    return HostPort { "", ParseAndValidatePort(arg, errors) };
   }
   // Host and port found:
   return HostPort { RemoveBrackets(arg.substr(0, colon)),
-                    ParseAndValidatePort(arg.substr(colon + 1), error) };
+                    ParseAndValidatePort(arg.substr(colon + 1), errors) };
 }
 
 // Usage: Either:
diff --git a/src/node_options.h b/src/node_options.h
index 4b9ee000367405..506db25dec2efa 100644
--- a/src/node_options.h
+++ b/src/node_options.h
@@ -21,11 +21,16 @@ struct HostPort {
   }
 };
 
+class Options {
+ public:
+  virtual void CheckOptions(std::vector<std::string>* errors) {}
+};
+
 // These options are currently essentially per-Environment, but it can be nice
 // to keep them separate since they are a group of options applying to a very
 // specific part of Node. It might also make more sense for them to be
 // per-Isolate, rather than per-Environment.
-class DebugOptions {
+class DebugOptions : public Options {
  public:
   bool inspector_enabled = false;
   bool deprecated_debug = false;
@@ -57,7 +62,7 @@ class DebugOptions {
   }
 };
 
-class EnvironmentOptions {
+class EnvironmentOptions : public Options {
  public:
   std::shared_ptr<DebugOptions> debug_options { new DebugOptions() };
   bool abort_on_uncaught_exception = false;
@@ -91,17 +96,19 @@ class EnvironmentOptions {
   std::vector<std::string> user_argv;
 
   inline DebugOptions* get_debug_options();
+  void CheckOptions(std::vector<std::string>* errors);
 };
 
-class PerIsolateOptions {
+class PerIsolateOptions : public Options {
  public:
   std::shared_ptr<EnvironmentOptions> per_env { new EnvironmentOptions() };
   bool track_heap_objects = false;
 
   inline EnvironmentOptions* get_per_env_options();
+  void CheckOptions(std::vector<std::string>* errors);
 };
 
-class PerProcessOptions {
+class PerProcessOptions : public Options {
  public:
   std::shared_ptr<PerIsolateOptions> per_isolate { new PerIsolateOptions() };
 
@@ -139,13 +146,15 @@ class PerProcessOptions {
 #endif
 
   inline PerIsolateOptions* get_per_isolate_options();
+  void CheckOptions(std::vector<std::string>* errors);
 };
 
 // The actual options parser, as opposed to the structs containing them:
 
 namespace options_parser {
 
-HostPort SplitHostPort(const std::string& arg, std::string* error);
+HostPort SplitHostPort(const std::string& arg,
+    std::vector<std::string>* errors);
 void GetOptions(const v8::FunctionCallbackInfo<v8::Value>& args);
 
 enum OptionEnvvarSettings {
@@ -255,7 +264,7 @@ class OptionsParser {
                      std::vector<std::string>* const v8_args,
                      Options* const options,
                      OptionEnvvarSettings required_env_settings,
-                     std::string* const error);
+                     std::vector<std::string>* const errors);
 
  private:
   // We support the wide variety of different option types by remembering