diff --git a/lib/.eslintrc.yaml b/lib/.eslintrc.yaml
index 29099193bb089e..35ced9e9011016 100644
--- a/lib/.eslintrc.yaml
+++ b/lib/.eslintrc.yaml
@@ -71,6 +71,8 @@ rules:
       message: "Use `const { WeakMap } = primordials;` instead of the global."
     - name: WeakSet
       message: "Use `const { WeakSet } = primordials;` instead of the global."
+    - name: parseFloat
+      message: "Use `const { NumberParseFloat } = primordials;` instead of the global."
     - name: parseInt
       message: "Use `const { NumberParseInt } = primordials;` instead of the global."
   no-restricted-syntax:
diff --git a/lib/internal/util/inspect.js b/lib/internal/util/inspect.js
index b5b2b8ce4f234a..7f75325e863128 100644
--- a/lib/internal/util/inspect.js
+++ b/lib/internal/util/inspect.js
@@ -29,6 +29,7 @@ const {
   MathSqrt,
   Number,
   NumberIsNaN,
+  NumberParseFloat,
   NumberParseInt,
   NumberPrototypeValueOf,
   Object,
@@ -1960,7 +1961,8 @@ function formatWithOptionsInternal(inspectOptions, ...args) {
               if (typeof tempFloat === 'symbol') {
                 tempStr = 'NaN';
               } else {
-                tempStr = formatNumber(stylizeNoColor, parseFloat(tempFloat));
+                tempStr = formatNumber(stylizeNoColor,
+                                       NumberParseFloat(tempFloat));
               }
               break;
             case 99: // 'c'
diff --git a/lib/repl.js b/lib/repl.js
index 773d2f64c43f05..adb20c653199ea 100644
--- a/lib/repl.js
+++ b/lib/repl.js
@@ -46,6 +46,7 @@ const {
   Error,
   MathMax,
   NumberIsNaN,
+  NumberParseFloat,
   ObjectAssign,
   ObjectCreate,
   ObjectDefineProperty,
@@ -58,7 +59,9 @@ const {
   PromiseRace,
   RegExp,
   Set,
+  StringPrototypeCharAt,
   StringPrototypeIncludes,
+  StringPrototypeMatch,
   Symbol,
   SyntaxError,
   SyntaxErrorPrototype,
@@ -791,9 +794,10 @@ function REPLServer(prompt,
     // Check to see if a REPL keyword was used. If it returns true,
     // display next prompt and return.
     if (trimmedCmd) {
-      if (trimmedCmd.charAt(0) === '.' && trimmedCmd.charAt(1) !== '.' &&
-          NumberIsNaN(parseFloat(trimmedCmd))) {
-        const matches = trimmedCmd.match(/^\.([^\s]+)\s*(.*)$/);
+      if (StringPrototypeCharAt(trimmedCmd, 0) === '.' &&
+          StringPrototypeCharAt(trimmedCmd, 1) !== '.' &&
+          NumberIsNaN(NumberParseFloat(trimmedCmd))) {
+        const matches = StringPrototypeMatch(trimmedCmd, /^\.([^\s]+)\s*(.*)$/);
         const keyword = matches && matches[1];
         const rest = matches && matches[2];
         if (_parseREPLKeyword.call(self, keyword, rest) === true) {