diff --git a/.jscs.json b/.jscs.json
index 6e900d1..d75cbb4 100644
--- a/.jscs.json
+++ b/.jscs.json
@@ -4,10 +4,12 @@
   "disallowImplicitTypeConversion": ["numeric", "boolean", "binary", "string"],
   "disallowKeywords": ["with", "eval"],
   "disallowMixedSpacesAndTabs": true,
+  "disallowMultiLineTernary": true,
   "disallowMultipleLineBreaks": true,
   "disallowMultipleLineStrings": true,
   "disallowMultipleSpaces": true,
   "disallowMultipleVarDecl": "strict",
+  "disallowNestedTernaries": true,
   "disallowNewlineBeforeBlockStatements": true,
   "disallowOperatorBeforeLineBreak": ["."],
   "disallowPaddingNewlinesBeforeKeywords": ["else", "case", "catch", "typeof"],
@@ -22,8 +24,10 @@
   "disallowSpacesInNamedFunctionExpression": { "beforeOpeningRoundBrace": true },
   "disallowSpacesInsideArrayBrackets": true,
   "disallowSpacesInsideParentheses": true,
+  "disallowTabs": true,
   "disallowTrailingComma": true,
   "disallowTrailingWhitespace": true,
+  "disallowUnusedParams": true,
   "maximumLineLength": { "value": 85, "allowComments": true },
   "requireBlocksOnNewline": 1,
   "requireCamelCaseOrUpperCaseIdentifiers": true,
@@ -41,6 +45,7 @@
   "requireParenthesesAroundIIFE": true,
   "requireSemicolons": true,
   "requireSpaceAfterBinaryOperators": true,
+  "requireSpaceAfterComma": true,
   "requireSpaceAfterKeywords": true,
   "requireSpaceAfterLineComment": true,
   "requireSpaceBeforeBinaryOperators": true,
diff --git a/chai-immutable.js b/chai-immutable.js
index 3078b73..fa04fb0 100644
--- a/chai-immutable.js
+++ b/chai-immutable.js
@@ -154,7 +154,7 @@
     }
 
     function chainCollectionInclude(_super) {
-      return function (val) {
+      return function () {
         _super.apply(this, arguments);
       };
     };
diff --git a/package.json b/package.json
index 03ec4af..949e46d 100644
--- a/package.json
+++ b/package.json
@@ -41,7 +41,7 @@
     "coveralls": "^2.11.4",
     "immutable": "^3.7.5",
     "istanbul": "^0.4.0",
-    "jscs": "^2.1.1",
+    "jscs": "^2.5.0",
     "mocha": "^2.3.3",
     "mocha-phantomjs": "^4.0.1"
   }