diff --git a/src/lib/es2015.core.d.ts b/src/lib/es2015.core.d.ts
index 032a7afc0ecf9..b202f3e01decd 100644
--- a/src/lib/es2015.core.d.ts
+++ b/src/lib/es2015.core.d.ts
@@ -248,8 +248,8 @@ interface NumberConstructor {
 
     /**
      * Converts A string to an integer.
-     * @param s A string to convert into a number.
-     * @param radix A value between 2 and 36 that specifies the base of the number in numString.
+     * @param string A string to convert into a number.
+     * @param radix A value between 2 and 36 that specifies the base of the number in `string`.
      * If this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.
      * All other strings are considered decimal.
      */
diff --git a/src/lib/es5.d.ts b/src/lib/es5.d.ts
index 98bb0ee676e5d..b8c0c0d6bda39 100644
--- a/src/lib/es5.d.ts
+++ b/src/lib/es5.d.ts
@@ -13,12 +13,12 @@ declare function eval(x: string): any;
 
 /**
  * Converts a string to an integer.
- * @param s A string to convert into a number.
- * @param radix A value between 2 and 36 that specifies the base of the number in numString.
+ * @param string A string to convert into a number.
+ * @param radix A value between 2 and 36 that specifies the base of the number in `string`.
  * If this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.
  * All other strings are considered decimal.
  */
-declare function parseInt(s: string, radix?: number): number;
+declare function parseInt(string: string, radix?: number): number;
 
 /**
  * Converts a string to a floating-point number.
diff --git a/tests/baselines/reference/abstractPropertyInConstructor.types b/tests/baselines/reference/abstractPropertyInConstructor.types
index 8c8bd40aff09c..e63737006c6bf 100644
--- a/tests/baselines/reference/abstractPropertyInConstructor.types
+++ b/tests/baselines/reference/abstractPropertyInConstructor.types
@@ -12,7 +12,7 @@ abstract class AbstractClass {
 >this : this
 >method : (num: number) => void
 >parseInt(str) : number
->parseInt : (s: string, radix?: number) => number
+>parseInt : (string: string, radix?: number) => number
 >str : string
 
         let val = this.prop.toLowerCase();
diff --git a/tests/baselines/reference/completionsCommentsClass.baseline b/tests/baselines/reference/completionsCommentsClass.baseline
index 7b6471500b37e..8348d644b7f3f 100644
--- a/tests/baselines/reference/completionsCommentsClass.baseline
+++ b/tests/baselines/reference/completionsCommentsClass.baseline
@@ -122,7 +122,7 @@
               "kind": "punctuation"
             },
             {
-              "text": "s",
+              "text": "string",
               "kind": "parameterName"
             },
             {
@@ -191,11 +191,11 @@
           "tags": [
             {
               "name": "param",
-              "text": "s A string to convert into a number."
+              "text": "string A string to convert into a number."
             },
             {
               "name": "param",
-              "text": "radix A value between 2 and 36 that specifies the base of the number in numString.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
+              "text": "radix A value between 2 and 36 that specifies the base of the number in `string`.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
             }
           ]
         },
diff --git a/tests/baselines/reference/completionsCommentsClassMembers.baseline b/tests/baselines/reference/completionsCommentsClassMembers.baseline
index d2a5cf992bfa8..f5ab0284565e8 100644
--- a/tests/baselines/reference/completionsCommentsClassMembers.baseline
+++ b/tests/baselines/reference/completionsCommentsClassMembers.baseline
@@ -9061,7 +9061,7 @@
               "kind": "punctuation"
             },
             {
-              "text": "s",
+              "text": "string",
               "kind": "parameterName"
             },
             {
@@ -9130,11 +9130,11 @@
           "tags": [
             {
               "name": "param",
-              "text": "s A string to convert into a number."
+              "text": "string A string to convert into a number."
             },
             {
               "name": "param",
-              "text": "radix A value between 2 and 36 that specifies the base of the number in numString.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
+              "text": "radix A value between 2 and 36 that specifies the base of the number in `string`.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
             }
           ]
         },
@@ -14051,7 +14051,7 @@
               "kind": "punctuation"
             },
             {
-              "text": "s",
+              "text": "string",
               "kind": "parameterName"
             },
             {
@@ -14120,11 +14120,11 @@
           "tags": [
             {
               "name": "param",
-              "text": "s A string to convert into a number."
+              "text": "string A string to convert into a number."
             },
             {
               "name": "param",
-              "text": "radix A value between 2 and 36 that specifies the base of the number in numString.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
+              "text": "radix A value between 2 and 36 that specifies the base of the number in `string`.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
             }
           ]
         },
@@ -22449,7 +22449,7 @@
               "kind": "punctuation"
             },
             {
-              "text": "s",
+              "text": "string",
               "kind": "parameterName"
             },
             {
@@ -22518,11 +22518,11 @@
           "tags": [
             {
               "name": "param",
-              "text": "s A string to convert into a number."
+              "text": "string A string to convert into a number."
             },
             {
               "name": "param",
-              "text": "radix A value between 2 and 36 that specifies the base of the number in numString.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
+              "text": "radix A value between 2 and 36 that specifies the base of the number in `string`.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
             }
           ]
         },
@@ -26299,7 +26299,7 @@
               "kind": "punctuation"
             },
             {
-              "text": "s",
+              "text": "string",
               "kind": "parameterName"
             },
             {
@@ -26368,11 +26368,11 @@
           "tags": [
             {
               "name": "param",
-              "text": "s A string to convert into a number."
+              "text": "string A string to convert into a number."
             },
             {
               "name": "param",
-              "text": "radix A value between 2 and 36 that specifies the base of the number in numString.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
+              "text": "radix A value between 2 and 36 that specifies the base of the number in `string`.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
             }
           ]
         },
@@ -30149,7 +30149,7 @@
               "kind": "punctuation"
             },
             {
-              "text": "s",
+              "text": "string",
               "kind": "parameterName"
             },
             {
@@ -30218,11 +30218,11 @@
           "tags": [
             {
               "name": "param",
-              "text": "s A string to convert into a number."
+              "text": "string A string to convert into a number."
             },
             {
               "name": "param",
-              "text": "radix A value between 2 and 36 that specifies the base of the number in numString.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
+              "text": "radix A value between 2 and 36 that specifies the base of the number in `string`.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
             }
           ]
         },
@@ -33999,7 +33999,7 @@
               "kind": "punctuation"
             },
             {
-              "text": "s",
+              "text": "string",
               "kind": "parameterName"
             },
             {
@@ -34068,11 +34068,11 @@
           "tags": [
             {
               "name": "param",
-              "text": "s A string to convert into a number."
+              "text": "string A string to convert into a number."
             },
             {
               "name": "param",
-              "text": "radix A value between 2 and 36 that specifies the base of the number in numString.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
+              "text": "radix A value between 2 and 36 that specifies the base of the number in `string`.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
             }
           ]
         },
@@ -37849,7 +37849,7 @@
               "kind": "punctuation"
             },
             {
-              "text": "s",
+              "text": "string",
               "kind": "parameterName"
             },
             {
@@ -37918,11 +37918,11 @@
           "tags": [
             {
               "name": "param",
-              "text": "s A string to convert into a number."
+              "text": "string A string to convert into a number."
             },
             {
               "name": "param",
-              "text": "radix A value between 2 and 36 that specifies the base of the number in numString.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
+              "text": "radix A value between 2 and 36 that specifies the base of the number in `string`.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
             }
           ]
         },
@@ -41699,7 +41699,7 @@
               "kind": "punctuation"
             },
             {
-              "text": "s",
+              "text": "string",
               "kind": "parameterName"
             },
             {
@@ -41768,11 +41768,11 @@
           "tags": [
             {
               "name": "param",
-              "text": "s A string to convert into a number."
+              "text": "string A string to convert into a number."
             },
             {
               "name": "param",
-              "text": "radix A value between 2 and 36 that specifies the base of the number in numString.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
+              "text": "radix A value between 2 and 36 that specifies the base of the number in `string`.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
             }
           ]
         },
diff --git a/tests/baselines/reference/completionsCommentsCommentParsing.baseline b/tests/baselines/reference/completionsCommentsCommentParsing.baseline
index 3c316e03108d7..ebc1f3ab60986 100644
--- a/tests/baselines/reference/completionsCommentsCommentParsing.baseline
+++ b/tests/baselines/reference/completionsCommentsCommentParsing.baseline
@@ -122,7 +122,7 @@
               "kind": "punctuation"
             },
             {
-              "text": "s",
+              "text": "string",
               "kind": "parameterName"
             },
             {
@@ -191,11 +191,11 @@
           "tags": [
             {
               "name": "param",
-              "text": "s A string to convert into a number."
+              "text": "string A string to convert into a number."
             },
             {
               "name": "param",
-              "text": "radix A value between 2 and 36 that specifies the base of the number in numString.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
+              "text": "radix A value between 2 and 36 that specifies the base of the number in `string`.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
             }
           ]
         },
@@ -5358,7 +5358,7 @@
               "kind": "punctuation"
             },
             {
-              "text": "s",
+              "text": "string",
               "kind": "parameterName"
             },
             {
@@ -5427,11 +5427,11 @@
           "tags": [
             {
               "name": "param",
-              "text": "s A string to convert into a number."
+              "text": "string A string to convert into a number."
             },
             {
               "name": "param",
-              "text": "radix A value between 2 and 36 that specifies the base of the number in numString.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
+              "text": "radix A value between 2 and 36 that specifies the base of the number in `string`.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
             }
           ]
         },
@@ -11327,7 +11327,7 @@
               "kind": "punctuation"
             },
             {
-              "text": "s",
+              "text": "string",
               "kind": "parameterName"
             },
             {
@@ -11396,11 +11396,11 @@
           "tags": [
             {
               "name": "param",
-              "text": "s A string to convert into a number."
+              "text": "string A string to convert into a number."
             },
             {
               "name": "param",
-              "text": "radix A value between 2 and 36 that specifies the base of the number in numString.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
+              "text": "radix A value between 2 and 36 that specifies the base of the number in `string`.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
             }
           ]
         },
@@ -16347,7 +16347,7 @@
               "kind": "punctuation"
             },
             {
-              "text": "s",
+              "text": "string",
               "kind": "parameterName"
             },
             {
@@ -16416,11 +16416,11 @@
           "tags": [
             {
               "name": "param",
-              "text": "s A string to convert into a number."
+              "text": "string A string to convert into a number."
             },
             {
               "name": "param",
-              "text": "radix A value between 2 and 36 that specifies the base of the number in numString.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
+              "text": "radix A value between 2 and 36 that specifies the base of the number in `string`.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
             }
           ]
         },
@@ -21345,7 +21345,7 @@
               "kind": "punctuation"
             },
             {
-              "text": "s",
+              "text": "string",
               "kind": "parameterName"
             },
             {
@@ -21414,11 +21414,11 @@
           "tags": [
             {
               "name": "param",
-              "text": "s A string to convert into a number."
+              "text": "string A string to convert into a number."
             },
             {
               "name": "param",
-              "text": "radix A value between 2 and 36 that specifies the base of the number in numString.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
+              "text": "radix A value between 2 and 36 that specifies the base of the number in `string`.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
             }
           ]
         },
@@ -26593,7 +26593,7 @@
               "kind": "punctuation"
             },
             {
-              "text": "s",
+              "text": "string",
               "kind": "parameterName"
             },
             {
@@ -26662,11 +26662,11 @@
           "tags": [
             {
               "name": "param",
-              "text": "s A string to convert into a number."
+              "text": "string A string to convert into a number."
             },
             {
               "name": "param",
-              "text": "radix A value between 2 and 36 that specifies the base of the number in numString.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
+              "text": "radix A value between 2 and 36 that specifies the base of the number in `string`.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
             }
           ]
         },
@@ -32562,7 +32562,7 @@
               "kind": "punctuation"
             },
             {
-              "text": "s",
+              "text": "string",
               "kind": "parameterName"
             },
             {
@@ -32631,11 +32631,11 @@
           "tags": [
             {
               "name": "param",
-              "text": "s A string to convert into a number."
+              "text": "string A string to convert into a number."
             },
             {
               "name": "param",
-              "text": "radix A value between 2 and 36 that specifies the base of the number in numString.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
+              "text": "radix A value between 2 and 36 that specifies the base of the number in `string`.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
             }
           ]
         },
diff --git a/tests/baselines/reference/completionsCommentsFunctionDeclaration.baseline b/tests/baselines/reference/completionsCommentsFunctionDeclaration.baseline
index de8e747d5d953..81d93102a3209 100644
--- a/tests/baselines/reference/completionsCommentsFunctionDeclaration.baseline
+++ b/tests/baselines/reference/completionsCommentsFunctionDeclaration.baseline
@@ -122,7 +122,7 @@
               "kind": "punctuation"
             },
             {
-              "text": "s",
+              "text": "string",
               "kind": "parameterName"
             },
             {
@@ -191,11 +191,11 @@
           "tags": [
             {
               "name": "param",
-              "text": "s A string to convert into a number."
+              "text": "string A string to convert into a number."
             },
             {
               "name": "param",
-              "text": "radix A value between 2 and 36 that specifies the base of the number in numString.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
+              "text": "radix A value between 2 and 36 that specifies the base of the number in `string`.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
             }
           ]
         },
@@ -4461,7 +4461,7 @@
               "kind": "punctuation"
             },
             {
-              "text": "s",
+              "text": "string",
               "kind": "parameterName"
             },
             {
@@ -4530,11 +4530,11 @@
           "tags": [
             {
               "name": "param",
-              "text": "s A string to convert into a number."
+              "text": "string A string to convert into a number."
             },
             {
               "name": "param",
-              "text": "radix A value between 2 and 36 that specifies the base of the number in numString.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
+              "text": "radix A value between 2 and 36 that specifies the base of the number in `string`.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
             }
           ]
         },
@@ -7635,7 +7635,7 @@
               "kind": "punctuation"
             },
             {
-              "text": "s",
+              "text": "string",
               "kind": "parameterName"
             },
             {
@@ -7704,11 +7704,11 @@
           "tags": [
             {
               "name": "param",
-              "text": "s A string to convert into a number."
+              "text": "string A string to convert into a number."
             },
             {
               "name": "param",
-              "text": "radix A value between 2 and 36 that specifies the base of the number in numString.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
+              "text": "radix A value between 2 and 36 that specifies the base of the number in `string`.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
             }
           ]
         },
diff --git a/tests/baselines/reference/completionsCommentsFunctionExpression.baseline b/tests/baselines/reference/completionsCommentsFunctionExpression.baseline
index 8c8c35f524aa8..bc2ddeff0c2cf 100644
--- a/tests/baselines/reference/completionsCommentsFunctionExpression.baseline
+++ b/tests/baselines/reference/completionsCommentsFunctionExpression.baseline
@@ -122,7 +122,7 @@
               "kind": "punctuation"
             },
             {
-              "text": "s",
+              "text": "string",
               "kind": "parameterName"
             },
             {
@@ -191,11 +191,11 @@
           "tags": [
             {
               "name": "param",
-              "text": "s A string to convert into a number."
+              "text": "string A string to convert into a number."
             },
             {
               "name": "param",
-              "text": "radix A value between 2 and 36 that specifies the base of the number in numString.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
+              "text": "radix A value between 2 and 36 that specifies the base of the number in `string`.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
             }
           ]
         },
@@ -3667,7 +3667,7 @@
               "kind": "punctuation"
             },
             {
-              "text": "s",
+              "text": "string",
               "kind": "parameterName"
             },
             {
@@ -3736,11 +3736,11 @@
           "tags": [
             {
               "name": "param",
-              "text": "s A string to convert into a number."
+              "text": "string A string to convert into a number."
             },
             {
               "name": "param",
-              "text": "radix A value between 2 and 36 that specifies the base of the number in numString.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
+              "text": "radix A value between 2 and 36 that specifies the base of the number in `string`.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
             }
           ]
         },
@@ -8167,7 +8167,7 @@
               "kind": "punctuation"
             },
             {
-              "text": "s",
+              "text": "string",
               "kind": "parameterName"
             },
             {
@@ -8236,11 +8236,11 @@
           "tags": [
             {
               "name": "param",
-              "text": "s A string to convert into a number."
+              "text": "string A string to convert into a number."
             },
             {
               "name": "param",
-              "text": "radix A value between 2 and 36 that specifies the base of the number in numString.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
+              "text": "radix A value between 2 and 36 that specifies the base of the number in `string`.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
             }
           ]
         },
@@ -11712,7 +11712,7 @@
               "kind": "punctuation"
             },
             {
-              "text": "s",
+              "text": "string",
               "kind": "parameterName"
             },
             {
@@ -11781,11 +11781,11 @@
           "tags": [
             {
               "name": "param",
-              "text": "s A string to convert into a number."
+              "text": "string A string to convert into a number."
             },
             {
               "name": "param",
-              "text": "radix A value between 2 and 36 that specifies the base of the number in numString.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
+              "text": "radix A value between 2 and 36 that specifies the base of the number in `string`.\r\nIf this argument is not supplied, strings with a prefix of '0x' are considered hexadecimal.\r\nAll other strings are considered decimal."
             }
           ]
         },
diff --git a/tests/baselines/reference/externFunc.types b/tests/baselines/reference/externFunc.types
index 5cda004d4cf55..5e758c05bede0 100644
--- a/tests/baselines/reference/externFunc.types
+++ b/tests/baselines/reference/externFunc.types
@@ -1,10 +1,10 @@
 === tests/cases/compiler/externFunc.ts ===
 declare function parseInt(s:string):number;
->parseInt : { (s: string, radix?: number): number; (s: string): number; }
+>parseInt : { (string: string, radix?: number): number; (s: string): number; }
 >s : string
 
 parseInt("2");
 >parseInt("2") : number
->parseInt : { (s: string, radix?: number): number; (s: string): number; }
+>parseInt : { (string: string, radix?: number): number; (s: string): number; }
 >"2" : "2"
 
diff --git a/tests/baselines/reference/parserRealSource11.types b/tests/baselines/reference/parserRealSource11.types
index 133ee1fc27a66..7e8b3431e63a2 100644
--- a/tests/baselines/reference/parserRealSource11.types
+++ b/tests/baselines/reference/parserRealSource11.types
@@ -733,7 +733,7 @@ module TypeScript {
                     var charCode = parseInt(name.substr(i + 2, 4), 16);
 >charCode : number
 >parseInt(name.substr(i + 2, 4), 16) : number
->parseInt : (s: string, radix?: number) => number
+>parseInt : (string: string, radix?: number) => number
 >name.substr(i + 2, 4) : string
 >name.substr : (from: number, length?: number) => string
 >name : string