diff --git a/spec/behavior/generated-parser-behavior.spec.js b/spec/behavior/generated-parser-behavior.spec.js
index 41937f7..196491d 100644
--- a/spec/behavior/generated-parser-behavior.spec.js
+++ b/spec/behavior/generated-parser-behavior.spec.js
@@ -34,9 +34,8 @@ describe("generated parser behavior", function() {
 
   beforeEach(function() {
     this.addMatchers({
-      toParse: function(input) {
-        var options  = arguments.length > 2 ? arguments[1] : {},
-            expected = arguments[arguments.length - 1],
+      toParse: function(input, expected) {
+        var options = arguments.length > 2 ? arguments[2] : {},
             result;
 
         try {
@@ -68,11 +67,8 @@ describe("generated parser behavior", function() {
         }
       },
 
-      toFailToParse: function(input) {
-        var options = arguments.length > 2 ? arguments[1] : {},
-            details = arguments.length > 1
-                        ? arguments[arguments.length - 1]
-                        : undefined,
+      toFailToParse: function(input, details) {
+        var options = arguments.length > 2 ? arguments[2] : {},
             result;
 
         try {
diff --git a/spec/unit/compiler/passes/helpers.js b/spec/unit/compiler/passes/helpers.js
index 1df6630..5c862d5 100644
--- a/spec/unit/compiler/passes/helpers.js
+++ b/spec/unit/compiler/passes/helpers.js
@@ -4,7 +4,7 @@
 
 beforeEach(function() {
   this.addMatchers({
-    toChangeAST: function(grammar) {
+    toChangeAST: function(grammar, details) {
       function matchDetails(value, details) {
         function isArray(value) {
           return Object.prototype.toString.apply(value) === "[object Array]";
@@ -42,8 +42,7 @@ beforeEach(function() {
         }
       }
 
-      var options = arguments.length > 2 ? arguments[1] : {},
-          details = arguments[arguments.length - 1],
+      var options = arguments.length > 2 ? arguments[2] : {},
           ast     = PEG.parser.parse(grammar);
 
       this.actual(ast, options);
diff --git a/spec/unit/compiler/passes/remove-proxy-rules.spec.js b/spec/unit/compiler/passes/remove-proxy-rules.spec.js
index aaebab7..a2c7dbc 100644
--- a/spec/unit/compiler/passes/remove-proxy-rules.spec.js
+++ b/spec/unit/compiler/passes/remove-proxy-rules.spec.js
@@ -13,7 +13,6 @@ describe("compiler pass |removeProxyRules|", function() {
           'proxy = proxied',
           'proxied = "a"'
         ].join("\n"),
-        { allowedStartRules: ["start"] },
         {
           rules: [
             {
@@ -22,7 +21,8 @@ describe("compiler pass |removeProxyRules|", function() {
             },
             { name: "proxied" }
           ]
-        }
+        },
+        { allowedStartRules: ["start"] }
       );
     });
   });
@@ -35,7 +35,6 @@ describe("compiler pass |removeProxyRules|", function() {
           'proxy = proxied',
           'proxied = "a"'
         ].join("\n"),
-        { allowedStartRules: ["start", "proxy"] },
         {
           rules: [
             {
@@ -48,7 +47,8 @@ describe("compiler pass |removeProxyRules|", function() {
             },
             { name: "proxied" }
           ]
-        }
+        },
+        { allowedStartRules: ["start", "proxy"] }
       );
     });
   });