diff --git a/src/cli-constant.js b/src/cli-constant.js
index b8b38948..8dd4ac42 100644
--- a/src/cli-constant.js
+++ b/src/cli-constant.js
@@ -1,8 +1,6 @@
 "use strict";
 
-const normalizer = require("./cli-normalizer");
-
-const detailOptions = normalizer.normalizeDetailOptions({
+const detailOptions = normalizeDetailOptions({
   "bracket-spacing": {
     type: "boolean",
     category: "format",
@@ -241,6 +239,29 @@ function dedent(str) {
   return str.replace(new RegExp(`^ {${spaces}}`, "gm"), "").trim();
 }
 
+function normalizeDetailOptions(rawDetailOptions) {
+  const names = Object.keys(rawDetailOptions).sort();
+
+  const normaliezd = names.map(name => {
+    const option = rawDetailOptions[name];
+    return Object.assign({}, option, {
+      name,
+      choices:
+        option.choices &&
+        option.choices.map(
+          choice => (typeof choice === "object" ? choice : { value: choice })
+        ),
+      getter: option.getter || (value => value)
+    });
+  });
+
+  normaliezd.forEach(normalizedOption => {
+    normaliezd[normalizedOption.name] = normalizedOption;
+  });
+
+  return normaliezd;
+}
+
 module.exports = {
   minimistOptions,
   detailOptions
diff --git a/src/cli-normalizer.js b/src/cli-normalizer.js
deleted file mode 100644
index bfad72c8..00000000
--- a/src/cli-normalizer.js
+++ /dev/null
@@ -1,95 +0,0 @@
-"use strict";
-
-const validator = require("./cli-validator");
-
-function normalizeDetailOptions(detailOptions) {
-  const names = Object.keys(detailOptions).sort();
-
-  const normaliezdOptions = names.map(name => {
-    const option = detailOptions[name];
-    const normalizedOption = Object.assign({}, option, {
-      name,
-      choices:
-        option.choices &&
-        option.choices.map(
-          choice => (typeof choice === "string" ? { value: choice } : choice)
-        ),
-      _getValue: (value, argv) => {
-        const normalizedValue = getValue(value, argv);
-
-        if (option.exception !== undefined) {
-          if (typeof option.exception === "function") {
-            if (option.exception(normalizedValue)) {
-              return normalizedValue;
-            }
-          } else {
-            if (normalizedValue === option.exception) {
-              return normalizedValue;
-            }
-          }
-        }
-
-        switch (option.type) {
-          case "int":
-            validator.validateIntOption(normalizedValue, normalizedOption);
-            return Number(normalizedValue);
-          case "choice":
-            validator.validateChoiceOption(normalizedValue, normalizedOption);
-            break;
-        }
-
-        return normalizedValue;
-      }
-    });
-
-    return normalizedOption;
-
-    function getValue(value, argv) {
-      if (value && option.deprecated) {
-        let warning = `\`--${name}\` is deprecated.`;
-        if (typeof option.deprecated === "string") {
-          warning += ` ${option.deprecated}`;
-        }
-        console.warn(warning);
-      }
-      if (typeof option.getter === "function") {
-        return option.getter(value, argv);
-      }
-      if (option.type === "choice") {
-        const choice = option.choices.find(choice => choice.value === value);
-        if (choice !== undefined && choice.deprecated) {
-          const warningValue =
-            value === "" ? "without an argument" : `with value \`${value}\``;
-          console.warn(
-            `\`--${name}\` ${warningValue} is deprecated. Automatically redirect to \`--${name}=${choice.redirect}\`.`
-          );
-          return choice.redirect;
-        }
-      }
-      return value;
-    }
-  });
-
-  normaliezdOptions.forEach(normalizedOption => {
-    normaliezdOptions[normalizedOption.name] = normalizedOption;
-  });
-
-  return normaliezdOptions;
-}
-
-function normalizeArgv(argv, detailOptions) {
-  const normalizedArgv = { _: argv["_"] };
-
-  detailOptions.forEach(option => {
-    Object.defineProperty(normalizedArgv, option.name, {
-      get: () => option._getValue(argv[option.name], normalizedArgv)
-    });
-  });
-
-  return normalizedArgv;
-}
-
-module.exports = {
-  normalizeArgv,
-  normalizeDetailOptions
-};
diff --git a/src/cli-util.js b/src/cli-util.js
index c5270198..90a4eb17 100644
--- a/src/cli-util.js
+++ b/src/cli-util.js
@@ -14,7 +14,7 @@ const prettier = eval("require")("../index");
 const cleanAST = require("./clean-ast").cleanAST;
 const resolver = require("./resolve-config");
 const constant = require("./cli-constant");
-const normalizer = require("./cli-normalizer");
+const validator = require("./cli-validator");
 const apiDefaultOptions = require("./options").defaults;
 
 function getOptions(argv) {
@@ -159,7 +159,7 @@ function getOptionsForFile(argv, filePath) {
 
 function parseArgsToOptions(argv, overrideDefaults) {
   return getOptions(
-    normalizer.normalizeArgv(
+    normalizeArgv(
       minimist(
         argv.__args,
         Object.assign({
@@ -172,7 +172,7 @@ function parseArgsToOptions(argv, overrideDefaults) {
           )
         })
       ),
-      constant.detailOptions
+      { warning: false }
     )
   );
 }
@@ -398,10 +398,99 @@ function indent(str, spaces) {
   return str.replace(/^/gm, " ".repeat(spaces));
 }
 
+function normalizeArgv(rawArgv, options) {
+  options = options || {};
+
+  const consoleWarn = options.warning === false ? () => {} : console.warn;
+
+  const normalized = {};
+
+  Object.keys(rawArgv).forEach(key => {
+    const rawValue = rawArgv[key];
+
+    if (key === "_") {
+      normalized[key] = rawValue;
+      return;
+    }
+
+    if (key.length === 1) {
+      // do nothing with alias
+      return;
+    }
+
+    const option = constant.detailOptions[key];
+
+    if (option === undefined) {
+      // unknown option
+      return;
+    }
+
+    const value = getValue(rawValue, option);
+
+    if (option.exception !== undefined) {
+      if (typeof option.exception === "function") {
+        if (option.exception(value)) {
+          normalized[key] = value;
+          return;
+        }
+      } else {
+        if (value === option.exception) {
+          normalized[key] = value;
+          return;
+        }
+      }
+    }
+
+    switch (option.type) {
+      case "int":
+        validator.validateIntOption(value, option);
+        normalized[key] = Number(value);
+        break;
+      case "choice":
+        validator.validateChoiceOption(value, option);
+      // eslint-disable-next-line no-fallthrough
+      default:
+        normalized[key] = value;
+        break;
+    }
+  });
+
+  return normalized;
+
+  function getValue(rawValue, option) {
+    if (rawValue && option.deprecated) {
+      let warning = `\`--${option.name}\` is deprecated.`;
+      if (typeof option.deprecated === "string") {
+        warning += ` ${option.deprecated}`;
+      }
+      consoleWarn(warning);
+    }
+
+    const value = option.getter(rawValue, rawArgv);
+
+    if (option.type === "choice") {
+      const choice = option.choices.find(choice => choice.value === rawValue);
+      if (choice !== undefined && choice.deprecated) {
+        const warningDescription =
+          rawValue === ""
+            ? "without an argument"
+            : `with value \`${rawValue}\``;
+        consoleWarn(
+          `\`--${option.name}\` ${warningDescription} is deprecated. Automatically redirect to \`--${option.name}=${choice.redirect}\`.`
+        );
+        return choice.redirect;
+      }
+    }
+
+    return value;
+  }
+}
+
 module.exports = {
   logResolvedConfigPathOrDie,
   format,
   formatStdin,
   formatFiles,
-  createUsage
+  createUsage,
+  normalizeArgv
 };
diff --git a/src/cli.js b/src/cli.js
index f40623bc..889009f5 100644
--- a/src/cli.js
+++ b/src/cli.js
@@ -6,13 +6,9 @@ const prettier = eval("require")("../index");
 const constant = require("./cli-constant");
 const util = require("./cli-util");
 const validator = require("./cli-validator");
-const normalizer = require("./cli-normalizer");
 
 function run(args) {
-  const argv = normalizer.normalizeArgv(
-    minimist(args, constant.minimistOptions),
-    constant.detailOptions
-  );
+  const argv = util.normalizeArgv(minimist(args, constant.minimistOptions));
 
   argv.__args = args;
   argv.__filePatterns = argv["_"];
diff --git a/tests_integration/__tests__/__snapshots__/config-invalid.js.snap b/tests_integration/__tests__/__snapshots__/config-invalid.js.snap
index 6af7802c..6f911812 100644
--- a/tests_integration/__tests__/__snapshots__/config-invalid.js.snap
+++ b/tests_integration/__tests__/__snapshots__/config-invalid.js.snap
@@ -19,9 +19,8 @@ Expected \\"none\\", \\"es5\\" or \\"all\\", but received: \\"wow\\"
 `;
 
 exports[`throw error with invalid config precedence option (configPrecedence) 1`] = `
-"Error: Invalid option for --config-precedence.
-Expected \\"cli-override\\", \\"file-override\\" or \\"prefer-file\\", but received: \\"option/configPrecedence\\"
-"
+"Invalid option for --config-precedence.
+Expected \\"cli-override\\", \\"file-override\\" or \\"prefer-file\\", but received: \\"option/configPrecedence\\""
 `;
 
 exports[`throw error with invalid config target (directory) 1`] = `