diff --git a/Makefile b/Makefile
index fd225e4..a1e2480 100644
--- a/Makefile
+++ b/Makefile
@@ -74,7 +74,7 @@ browser:
 	echo ' * Licensed under the MIT license.'                                          >> $(BROWSER_FILE_DEV)
 	echo ' */'                                                                         >> $(BROWSER_FILE_DEV)
 
-	$(BROWSERIFY) --standalone PEG $(MAIN_FILE) >> $(BROWSER_FILE_DEV)
+	$(BROWSERIFY) --standalone peg $(MAIN_FILE) >> $(BROWSER_FILE_DEV)
 
 	$(UGLIFYJS)                 \
 	  --mangle                  \
diff --git a/README.md b/README.md
index 676cac9..07163ce 100644
--- a/README.md
+++ b/README.md
@@ -87,25 +87,25 @@ You can tweak the generated parser with several options:
   * `--plugin` — makes PEG.js use a specified plugin (can be specified multiple
     times)
   * `--extra-options` — additional options (in JSON format) to pass to
-    `PEG.buildParser`
+    `peg.buildParser`
   * `--extra-options-file` — file with additional options (in JSON format) to
-    pass to `PEG.buildParser`
+    pass to `peg.buildParser`
   * `--trace` — makes the parser trace its progress
 
 ### JavaScript API
 
 In Node.js, require the PEG.js parser generator module:
 
-    var PEG = require("pegjs");
+    var peg = require("pegjs");
 
 In browser, include the PEG.js library in your web page or application using the
 `<script>` tag. If PEG.js detects an AMD loader, it will define itself as a
-module, otherwise the API will be available in the `PEG` global object.
+module, otherwise the API will be available in the `peg` global object.
 
-To generate a parser, call the `PEG.buildParser` method and pass your grammar as
+To generate a parser, call the `peg.buildParser` method and pass your grammar as
 a parameter:
 
-    var parser = PEG.buildParser("start = ('a' / 'b')+");
+    var parser = peg.buildParser("start = ('a' / 'b')+");
 
 The method will return generated parser object or its source code as a string
 (depending on the value of the `output` option — see below). It will throw an
@@ -113,7 +113,7 @@ exception if the grammar is invalid. The exception will contain `message`
 property with more details about the error.
 
 You can tweak the generated parser by passing a second parameter with an options
-object to `PEG.buildParser`. The following options are supported:
+object to `peg.buildParser`. The following options are supported:
 
   * `cache` — if `true`, makes the parser cache results, avoiding exponential
     parsing time in pathological cases but making the parser slower (default:
diff --git a/benchmark/run b/benchmark/run
index 28a514f..38581d1 100755
--- a/benchmark/run
+++ b/benchmark/run
@@ -6,10 +6,10 @@
 "use strict";
 
 var fs  = require("fs");
-var PEG = require("../lib/peg");
+var peg = require("../lib/peg");
 
 var benchmarks = require("./benchmarks.js");
-var Runner = require("./runner.js")(PEG);
+var Runner = require("./runner.js")(peg);
 
 /* Results Table Manipulation */
 
diff --git a/benchmark/runner.js b/benchmark/runner.js
index 2ec1723..9739d62 100644
--- a/benchmark/runner.js
+++ b/benchmark/runner.js
@@ -6,9 +6,9 @@
   if (typeof module !== 'undefined' && module.exports) {
     module.exports = factory;
   } else {
-    root.Runner = factory(root.PEG);
+    root.Runner = factory(root.peg);
   }
-}(this, function(PEG) {
+}(this, function(peg) {
 
   return {
     run: function(benchmarks, runCount, options, callbacks) {
@@ -63,7 +63,7 @@
         return function() {
           callbacks.benchmarkStart(benchmarks[i]);
 
-          state.parser = PEG.buildParser(
+          state.parser = peg.buildParser(
             callbacks.readFile("../examples/" + benchmarks[i].id + ".pegjs"),
             options
           );
diff --git a/bin/pegjs b/bin/pegjs
index 218547b..ecfa0f9 100755
--- a/bin/pegjs
+++ b/bin/pegjs
@@ -4,12 +4,12 @@
 
 var fs   = require("fs");
 var path = require("path");
-var PEG  = require("../lib/peg");
+var peg  = require("../lib/peg");
 
 /* Helpers */
 
 function printVersion() {
-  console.log("PEG.js " + PEG.VERSION);
+  console.log("PEG.js " + peg.VERSION);
 }
 
 function printHelp() {
@@ -39,9 +39,9 @@ function printHelp() {
   console.log("      --plugin <plugin>              use a specified plugin (can be specified");
   console.log("                                     multiple times)");
   console.log("      --extra-options <options>      additional options (in JSON format) to pass");
-  console.log("                                     to PEG.buildParser");
+  console.log("                                     to peg.buildParser");
   console.log("      --extra-options-file <file>    file with additional options (in JSON");
-  console.log("                                     format) to pass to PEG.buildParser");
+  console.log("                                     format) to pass to peg.buildParser");
   console.log("  -v, --version                      print version information and exit");
   console.log("  -h, --help                         print help and exit");
 }
@@ -272,7 +272,7 @@ readStream(inputStream, function(input) {
   var source;
 
   try {
-    source = PEG.buildParser(input, options);
+    source = peg.buildParser(input, options);
   } catch (e) {
     if (e.location !== undefined) {
       abort(e.location.start.line + ":" + e.location.start.column + ": " + e.message);
diff --git a/lib/compiler.js b/lib/compiler.js
index 068fb01..4689afa 100644
--- a/lib/compiler.js
+++ b/lib/compiler.js
@@ -15,7 +15,7 @@ var compiler = {
    *
    * Each pass is a function that is passed the AST. It can perform checks on it
    * or modify it as needed. If the pass encounters a semantic error, it throws
-   * |PEG.GrammarError|.
+   * |peg.GrammarError|.
    */
   passes: {
     check: {
@@ -33,7 +33,7 @@ var compiler = {
   },
 
   /*
-   * Generates a parser from a specified grammar AST. Throws |PEG.GrammarError|
+   * Generates a parser from a specified grammar AST. Throws |peg.GrammarError|
    * if the AST contains a semantic error. Note that not all errors are detected
    * during the generation and some may protrude to the generated parser and
    * cause its malfunction.
diff --git a/lib/peg.js b/lib/peg.js
index 04475bb..20ee552 100644
--- a/lib/peg.js
+++ b/lib/peg.js
@@ -3,7 +3,7 @@
 var arrays  = require("./utils/arrays"),
     objects = require("./utils/objects");
 
-var PEG = {
+var peg = {
   /* PEG.js version (uses semantic versioning). */
   VERSION: "0.9.0",
 
@@ -17,8 +17,8 @@ var PEG = {
    * The grammar must be a string in the format described by the metagramar in
    * the parser.pegjs file.
    *
-   * Throws |PEG.parser.SyntaxError| if the grammar contains a syntax error or
-   * |PEG.GrammarError| if it contains a semantic error. Note that not all
+   * Throws |peg.parser.SyntaxError| if the grammar contains a syntax error or
+   * |peg.GrammarError| if it contains a semantic error. Note that not all
    * errors are detected during the generation and some may protrude to the
    * generated parser and cause its malfunction.
    */
@@ -55,4 +55,4 @@ var PEG = {
   }
 };
 
-module.exports = PEG;
+module.exports = peg;
diff --git a/spec/api/generated-parser-api.spec.js b/spec/api/generated-parser-api.spec.js
index 0fd785a..2c3c898 100644
--- a/spec/api/generated-parser-api.spec.js
+++ b/spec/api/generated-parser-api.spec.js
@@ -1,24 +1,24 @@
 /* eslint no-console: 0 */
-/* global PEG, console */
+/* global peg, console */
 
 "use strict";
 
 describe("generated parser API", function() {
   describe("parse", function() {
     it("parses input", function() {
-      var parser = PEG.buildParser('start = "a"');
+      var parser = peg.buildParser('start = "a"');
 
       expect(parser.parse("a")).toBe("a");
     });
 
     it("throws an exception on syntax error", function() {
-      var parser = PEG.buildParser('start = "a"');
+      var parser = peg.buildParser('start = "a"');
 
       expect(function() { parser.parse("b"); }).toThrow();
     });
 
     describe("start rule", function() {
-      var parser = PEG.buildParser([
+      var parser = peg.buildParser([
             'a = "x" { return "a"; }',
             'b = "x" { return "b"; }',
             'c = "x" { return "c"; }'
@@ -47,7 +47,7 @@ describe("generated parser API", function() {
     });
 
     describe("tracing", function() {
-      var parser = PEG.buildParser([
+      var parser = peg.buildParser([
             'start = a / b',
             'a = "a"',
             'b = "b"'
@@ -135,7 +135,7 @@ describe("generated parser API", function() {
     });
 
     it("accepts custom options", function() {
-      var parser = PEG.buildParser('start = "a"');
+      var parser = peg.buildParser('start = "a"');
 
       parser.parse("a", { foo: 42 });
     });
diff --git a/spec/api/pegjs-api.spec.js b/spec/api/pegjs-api.spec.js
index 07b7b02..d74b891 100644
--- a/spec/api/pegjs-api.spec.js
+++ b/spec/api/pegjs-api.spec.js
@@ -1,22 +1,22 @@
-/* global PEG */
+/* global peg */
 
 "use strict";
 
 describe("PEG.js API", function() {
   describe("buildParser", function() {
     it("builds a parser", function() {
-      var parser = PEG.buildParser('start = "a"');
+      var parser = peg.buildParser('start = "a"');
 
       expect(typeof parser).toBe("object");
       expect(parser.parse("a")).toBe("a");
     });
 
     it("throws an exception on syntax error", function() {
-      expect(function() { PEG.buildParser('start = @'); }).toThrow();
+      expect(function() { peg.buildParser('start = @'); }).toThrow();
     });
 
     it("throws an exception on semantic error", function() {
-      expect(function() { PEG.buildParser('start = missing'); }).toThrow();
+      expect(function() { peg.buildParser('start = missing'); }).toThrow();
     });
 
     describe("allowed start rules", function() {
@@ -34,7 +34,7 @@ describe("PEG.js API", function() {
       describe("when optimizing for parsing speed", function() {
         describe("when |allowedStartRules| is not set", function() {
           it("generated parser can start only from the first rule", function() {
-            var parser = PEG.buildParser(grammar, { optimize: "speed" });
+            var parser = peg.buildParser(grammar, { optimize: "speed" });
 
             expect(parser.parse("x", { startRule: "a" })).toBe("x");
             expect(
@@ -48,7 +48,7 @@ describe("PEG.js API", function() {
 
         describe("when |allowedStartRules| is set", function() {
           it("generated parser can start only from specified rules", function() {
-            var parser = PEG.buildParser(grammar, {
+            var parser = peg.buildParser(grammar, {
               optimize:          "speed",
               allowedStartRules: ["b", "c"]
             });
@@ -65,7 +65,7 @@ describe("PEG.js API", function() {
       describe("when optimizing for code size", function() {
         describe("when |allowedStartRules| is not set", function() {
           it("generated parser can start only from the first rule", function() {
-            var parser = PEG.buildParser(grammar, { optimize: "size" });
+            var parser = peg.buildParser(grammar, { optimize: "size" });
 
             expect(parser.parse("x", { startRule: "a" })).toBe("x");
             expect(
@@ -79,7 +79,7 @@ describe("PEG.js API", function() {
 
         describe("when |allowedStartRules| is set", function() {
           it("generated parser can start only from specified rules", function() {
-            var parser = PEG.buildParser(grammar, {
+            var parser = peg.buildParser(grammar, {
               optimize:          "size",
               allowedStartRules: ["b", "c"]
             });
@@ -103,7 +103,7 @@ describe("PEG.js API", function() {
 
       describe("when |cache| is not set", function() {
         it("generated parser doesn't cache intermediate parse results", function() {
-          var parser = PEG.buildParser(grammar);
+          var parser = peg.buildParser(grammar);
 
           expect(parser.parse("ac")).toBe(2);
         });
@@ -111,7 +111,7 @@ describe("PEG.js API", function() {
 
       describe("when |cache| is set to |false|", function() {
         it("generated parser doesn't cache intermediate parse results", function() {
-          var parser = PEG.buildParser(grammar, { cache: false });
+          var parser = peg.buildParser(grammar, { cache: false });
 
           expect(parser.parse("ac")).toBe(2);
         });
@@ -119,7 +119,7 @@ describe("PEG.js API", function() {
 
       describe("when |cache| is set to |true|", function() {
         it("generated parser caches intermediate parse results", function() {
-          var parser = PEG.buildParser(grammar, { cache: true });
+          var parser = peg.buildParser(grammar, { cache: true });
 
           expect(parser.parse("ac")).toBe(1);
         });
@@ -131,7 +131,7 @@ describe("PEG.js API", function() {
 
       describe("when |trace| is not set", function() {
         it("generated parser doesn't trace", function() {
-          var parser = PEG.buildParser(grammar),
+          var parser = peg.buildParser(grammar),
               tracer = jasmine.createSpyObj("tracer", ["trace"]);
 
           parser.parse("a", { tracer: tracer });
@@ -142,7 +142,7 @@ describe("PEG.js API", function() {
 
       describe("when |trace| is set to |false|", function() {
         it("generated parser doesn't trace", function() {
-          var parser = PEG.buildParser(grammar, { trace: false }),
+          var parser = peg.buildParser(grammar, { trace: false }),
               tracer = jasmine.createSpyObj("tracer", ["trace"]);
 
           parser.parse("a", { tracer: tracer });
@@ -153,7 +153,7 @@ describe("PEG.js API", function() {
 
       describe("when |trace| is set to |true|", function() {
         it("generated parser traces", function() {
-          var parser = PEG.buildParser(grammar, { trace: true }),
+          var parser = peg.buildParser(grammar, { trace: true }),
               tracer = jasmine.createSpyObj("tracer", ["trace"]);
 
           parser.parse("a", { tracer: tracer });
@@ -173,7 +173,7 @@ describe("PEG.js API", function() {
 
       describe("when |output| is not set", function() {
         it("returns generated parser object", function() {
-          var parser = PEG.buildParser(grammar);
+          var parser = peg.buildParser(grammar);
 
           expect(typeof parser).toBe("object");
           expect(parser.parse("a")).toBe("a");
@@ -182,7 +182,7 @@ describe("PEG.js API", function() {
 
       describe("when |output| is set to |\"parser\"|", function() {
         it("returns generated parser object", function() {
-          var parser = PEG.buildParser(grammar, { output: "parser" });
+          var parser = peg.buildParser(grammar, { output: "parser" });
 
           expect(typeof parser).toBe("object");
           expect(parser.parse("a")).toBe("a");
@@ -191,7 +191,7 @@ describe("PEG.js API", function() {
 
       describe("when |output| is set to |\"source\"|", function() {
         it("returns generated parser source code", function() {
-          var source = PEG.buildParser(grammar, { output: "source" });
+          var source = peg.buildParser(grammar, { output: "source" });
 
           expect(typeof source).toBe("string");
           expect(eval(source).parse("a")).toBe("a");
@@ -208,7 +208,7 @@ describe("PEG.js API", function() {
     /* The |plugins| option is tested in plugin API specs. */
 
     it("accepts custom options", function() {
-      PEG.buildParser('start = "a"', { foo: 42 });
+      peg.buildParser('start = "a"', { foo: 42 });
     });
   });
 });
diff --git a/spec/api/plugin-api.spec.js b/spec/api/plugin-api.spec.js
index 59988d2..2ad00b5 100644
--- a/spec/api/plugin-api.spec.js
+++ b/spec/api/plugin-api.spec.js
@@ -1,4 +1,4 @@
-/* global PEG */
+/* global peg */
 
 "use strict";
 
@@ -48,7 +48,7 @@ describe("plugin API", function() {
             { use: function() { pluginsUsed[2] = true; } }
           ];
 
-      PEG.buildParser(grammar, { plugins: plugins });
+      peg.buildParser(grammar, { plugins: plugins });
 
       expect(pluginsUsed).toEqual([true, true, true]);
     });
@@ -82,7 +82,7 @@ describe("plugin API", function() {
             }
           };
 
-      PEG.buildParser(grammar, { plugins: [plugin] });
+      peg.buildParser(grammar, { plugins: [plugin] });
     });
 
     it("receives options", function() {
@@ -93,13 +93,13 @@ describe("plugin API", function() {
           },
           buildParserOptions = { plugins: [plugin], foo: 42 };
 
-      PEG.buildParser(grammar, buildParserOptions);
+      peg.buildParser(grammar, buildParserOptions);
     });
 
     it("can replace parser", function() {
       var plugin = {
             use: function(config) {
-              var parser = PEG.buildParser([
+              var parser = peg.buildParser([
                     'start = .* {',
                     '  return {',
                     '    type:  "grammar",',
@@ -117,7 +117,7 @@ describe("plugin API", function() {
               config.parser = parser;
             }
           },
-          parser = PEG.buildParser('a', { plugins: [plugin] });
+          parser = peg.buildParser('a', { plugins: [plugin] });
 
       expect(parser.parse("a")).toBe("a");
     });
@@ -132,7 +132,7 @@ describe("plugin API", function() {
               config.passes.generate = [pass];
             }
           },
-          parser = PEG.buildParser(grammar, { plugins: [plugin] });
+          parser = peg.buildParser(grammar, { plugins: [plugin] });
 
       expect(parser.parse("a")).toBe(42);
     });
@@ -148,7 +148,7 @@ describe("plugin API", function() {
               options.allowedStartRules = ["b", "c"];
             }
           },
-          parser  = PEG.buildParser(grammar, {
+          parser  = peg.buildParser(grammar, {
             allowedStartRules: ["a"],
             plugins:           [plugin]
           });
diff --git a/spec/behavior/generated-parser-behavior.spec.js b/spec/behavior/generated-parser-behavior.spec.js
index e596d44..be88c3f 100644
--- a/spec/behavior/generated-parser-behavior.spec.js
+++ b/spec/behavior/generated-parser-behavior.spec.js
@@ -1,4 +1,4 @@
-/* global PEG */
+/* global peg */
 
 "use strict";
 
@@ -130,7 +130,7 @@ describe("generated parser behavior", function() {
   varyOptimizationOptions(function(options) {
     describe("initializer", function() {
       it("executes the code before parsing starts", function() {
-        var parser = PEG.buildParser([
+        var parser = peg.buildParser([
               '{ var result = 42; }',
               'start = "a" { return result; }'
             ].join("\n"), options);
@@ -140,7 +140,7 @@ describe("generated parser behavior", function() {
 
       describe("available variables and functions", function() {
         it("|parser| contains the parser object", function() {
-          var parser = PEG.buildParser([
+          var parser = peg.buildParser([
                 '{ var result = parser; }',
                 'start = "a" { return result; }'
               ].join("\n"), options);
@@ -149,7 +149,7 @@ describe("generated parser behavior", function() {
         });
 
         it("|options| contains options", function() {
-          var parser = PEG.buildParser([
+          var parser = peg.buildParser([
                 '{ var result = options; }',
                 'start = "a" { return result; }'
               ].join("\n"), options);
@@ -162,7 +162,7 @@ describe("generated parser behavior", function() {
     describe("rule", function() {
       if (options.cache) {
         it("caches rule match results", function() {
-          var parser = PEG.buildParser([
+          var parser = peg.buildParser([
                 '{ var n = 0; }',
                 'start = (a "b") / (a "c") { return n; }',
                 'a = "a" { n++; }'
@@ -172,7 +172,7 @@ describe("generated parser behavior", function() {
         });
       } else {
         it("doesn't cache rule match results", function() {
-          var parser = PEG.buildParser([
+          var parser = peg.buildParser([
                 '{ var n = 0; }',
                 'start = (a "b") / (a "c") { return n; }',
                 'a = "a" { n++; }'
@@ -184,7 +184,7 @@ describe("generated parser behavior", function() {
 
       describe("when the expression matches", function() {
         it("returns its match result", function() {
-          var parser = PEG.buildParser('start = "a"');
+          var parser = peg.buildParser('start = "a"');
 
           expect(parser).toParse("a", "a");
         });
@@ -193,7 +193,7 @@ describe("generated parser behavior", function() {
       describe("when the expression doesn't match", function() {
         describe("without display name", function() {
           it("reports match failure and doesn't record any expectation", function() {
-            var parser = PEG.buildParser('start = "a"');
+            var parser = peg.buildParser('start = "a"');
 
             expect(parser).toFailToParse("b", {
               expected: [{ type: "literal", value: "a", description: '"a"' }]
@@ -203,7 +203,7 @@ describe("generated parser behavior", function() {
 
         describe("with display name", function() {
           it("reports match failure and records an expectation of type \"other\"", function() {
-            var parser = PEG.buildParser('start "start" = "a"');
+            var parser = peg.buildParser('start "start" = "a"');
 
             expect(parser).toFailToParse("b", {
               expected: [{ type: "other", description: "start" }]
@@ -211,7 +211,7 @@ describe("generated parser behavior", function() {
           });
 
           it("discards any expectations recorded when matching the expression", function() {
-            var parser = PEG.buildParser('start "start" = "a"');
+            var parser = peg.buildParser('start "start" = "a"');
 
             expect(parser).toFailToParse("b", {
               expected: [{ type: "other", description: "start" }]
@@ -224,34 +224,34 @@ describe("generated parser behavior", function() {
     describe("literal", function() {
       describe("matching", function() {
         it("matches empty literals", function() {
-          var parser = PEG.buildParser('start = ""', options);
+          var parser = peg.buildParser('start = ""', options);
 
           expect(parser).toParse("");
         });
 
         it("matches one-character literals", function() {
-          var parser = PEG.buildParser('start = "a"', options);
+          var parser = peg.buildParser('start = "a"', options);
 
           expect(parser).toParse("a");
           expect(parser).toFailToParse("b");
         });
 
         it("matches multi-character literals", function() {
-          var parser = PEG.buildParser('start = "abcd"', options);
+          var parser = peg.buildParser('start = "abcd"', options);
 
           expect(parser).toParse("abcd");
           expect(parser).toFailToParse("efgh");
         });
 
         it("is case sensitive without the \"i\" flag", function() {
-          var parser = PEG.buildParser('start = "a"', options);
+          var parser = peg.buildParser('start = "a"', options);
 
           expect(parser).toParse("a");
           expect(parser).toFailToParse("A");
         });
 
         it("is case insensitive with the \"i\" flag", function() {
-          var parser = PEG.buildParser('start = "a"i', options);
+          var parser = peg.buildParser('start = "a"i', options);
 
           expect(parser).toParse("a");
           expect(parser).toParse("A");
@@ -260,13 +260,13 @@ describe("generated parser behavior", function() {
 
       describe("when it matches", function() {
         it("returns the matched text", function() {
-          var parser = PEG.buildParser('start = "a"', options);
+          var parser = peg.buildParser('start = "a"', options);
 
           expect(parser).toParse("a", "a");
         });
 
         it("consumes the matched text", function() {
-          var parser = PEG.buildParser('start = "a" .', options);
+          var parser = peg.buildParser('start = "a" .', options);
 
           expect(parser).toParse("ab");
         });
@@ -274,7 +274,7 @@ describe("generated parser behavior", function() {
 
       describe("when it doesn't match", function() {
         it("reports match failure and records an expectation of type \"literal\"", function() {
-          var parser = PEG.buildParser('start = "a"', options);
+          var parser = peg.buildParser('start = "a"', options);
 
           expect(parser).toFailToParse("b", {
             expected: [{ type: "literal", value: "a", description: '"a"' }]
@@ -286,13 +286,13 @@ describe("generated parser behavior", function() {
     describe("character class", function() {
       describe("matching", function() {
         it("matches empty classes", function() {
-          var parser = PEG.buildParser('start = []', options);
+          var parser = peg.buildParser('start = []', options);
 
           expect(parser).toFailToParse("a");
         });
 
         it("matches classes with a character list", function() {
-          var parser = PEG.buildParser('start = [abc]', options);
+          var parser = peg.buildParser('start = [abc]', options);
 
           expect(parser).toParse("a");
           expect(parser).toParse("b");
@@ -301,7 +301,7 @@ describe("generated parser behavior", function() {
         });
 
         it("matches classes with a character range", function() {
-          var parser = PEG.buildParser('start = [a-c]', options);
+          var parser = peg.buildParser('start = [a-c]', options);
 
           expect(parser).toParse("a");
           expect(parser).toParse("b");
@@ -310,21 +310,21 @@ describe("generated parser behavior", function() {
         });
 
         it("matches inverted classes", function() {
-          var parser = PEG.buildParser('start = [^a]', options);
+          var parser = peg.buildParser('start = [^a]', options);
 
           expect(parser).toFailToParse("a");
           expect(parser).toParse("b");
         });
 
         it("is case sensitive without the \"i\" flag", function() {
-          var parser = PEG.buildParser('start = [a]', options);
+          var parser = peg.buildParser('start = [a]', options);
 
           expect(parser).toParse("a");
           expect(parser).toFailToParse("A");
         });
 
         it("is case insensitive with the \"i\" flag", function() {
-          var parser = PEG.buildParser('start = [a]i', options);
+          var parser = peg.buildParser('start = [a]i', options);
 
           expect(parser).toParse("a");
           expect(parser).toParse("A");
@@ -333,13 +333,13 @@ describe("generated parser behavior", function() {
 
       describe("when it matches", function() {
         it("returns the matched character", function() {
-          var parser = PEG.buildParser('start = [a]', options);
+          var parser = peg.buildParser('start = [a]', options);
 
           expect(parser).toParse("a", "a");
         });
 
         it("consumes the matched character", function() {
-          var parser = PEG.buildParser('start = [a] .', options);
+          var parser = peg.buildParser('start = [a] .', options);
 
           expect(parser).toParse("ab");
         });
@@ -347,7 +347,7 @@ describe("generated parser behavior", function() {
 
       describe("when it doesn't match", function() {
         it("reports match failure and records an expectation of type \"class\"", function() {
-          var parser = PEG.buildParser('start = [a]', options);
+          var parser = peg.buildParser('start = [a]', options);
 
           expect(parser).toFailToParse("b", {
             expected: [{ type: "class", value: "[a]", description: "[a]" }]
@@ -359,7 +359,7 @@ describe("generated parser behavior", function() {
     describe("dot", function() {
       describe("matching", function() {
         it("matches any character", function() {
-          var parser = PEG.buildParser('start = .', options);
+          var parser = peg.buildParser('start = .', options);
 
           expect(parser).toParse("a");
           expect(parser).toParse("b");
@@ -369,13 +369,13 @@ describe("generated parser behavior", function() {
 
       describe("when it matches", function() {
         it("returns the matched character", function() {
-          var parser = PEG.buildParser('start = .', options);
+          var parser = peg.buildParser('start = .', options);
 
           expect(parser).toParse("a", "a");
         });
 
         it("consumes the matched character", function() {
-          var parser = PEG.buildParser('start = . .', options);
+          var parser = peg.buildParser('start = . .', options);
 
           expect(parser).toParse("ab");
         });
@@ -383,7 +383,7 @@ describe("generated parser behavior", function() {
 
       describe("when it doesn't match", function() {
         it("reports match failure and records an expectation of type \"any\"", function() {
-          var parser = PEG.buildParser('start = .', options);
+          var parser = peg.buildParser('start = .', options);
 
           expect(parser).toFailToParse("", {
             expected: [{ type: "any", description: "any character" }]
@@ -395,7 +395,7 @@ describe("generated parser behavior", function() {
     describe("rule reference", function() {
       describe("when referenced rule's expression matches", function() {
         it("returns its result", function() {
-          var parser = PEG.buildParser([
+          var parser = peg.buildParser([
                 'start = a',
                 'a = "a"'
               ].join("\n"), options);
@@ -406,7 +406,7 @@ describe("generated parser behavior", function() {
 
       describe("when referenced rule's expression doesn't match", function() {
         it("reports match failure", function() {
-          var parser = PEG.buildParser([
+          var parser = peg.buildParser([
                 'start = a',
                 'a = "a"'
               ].join("\n"), options);
@@ -424,7 +424,7 @@ describe("generated parser behavior", function() {
            * |undefined| which we can't compare against in |toParse| due to the
            * way optional parameters work.
            */
-          var parser = PEG.buildParser('start = &{ return true; } ""', options);
+          var parser = peg.buildParser('start = &{ return true; } ""', options);
 
           expect(parser).toParse("", [undefined, ""]);
         });
@@ -432,7 +432,7 @@ describe("generated parser behavior", function() {
 
       describe("when the code returns a falsey value", function() {
         it("reports match failure", function() {
-          var parser = PEG.buildParser('start = &{ return false; }', options);
+          var parser = peg.buildParser('start = &{ return false; }', options);
 
           expect(parser).toFailToParse("");
         });
@@ -441,7 +441,7 @@ describe("generated parser behavior", function() {
       describe("label variables", function() {
         describe("in containing sequence", function() {
           it("can access variables defined by preceding labeled elements", function() {
-            var parser = PEG.buildParser(
+            var parser = peg.buildParser(
                   'start = a:"a" &{ return a === "a"; }',
                   options
                 );
@@ -450,7 +450,7 @@ describe("generated parser behavior", function() {
           });
 
           it("cannot access variable defined by labeled predicate element", function() {
-            var parser = PEG.buildParser(
+            var parser = peg.buildParser(
                   'start = "a" b:&{ return b === undefined; } "c"',
                   options
                 );
@@ -459,7 +459,7 @@ describe("generated parser behavior", function() {
           });
 
           it("cannot access variables defined by following labeled elements", function() {
-            var parser = PEG.buildParser(
+            var parser = peg.buildParser(
                   'start = &{ return a === "a"; } a:"a"',
                   options
                 );
@@ -517,7 +517,7 @@ describe("generated parser behavior", function() {
                 parser, i;
 
             for (i = 0; i < testcases.length; i++) {
-              parser = PEG.buildParser(testcases[i].grammar, options);
+              parser = peg.buildParser(testcases[i].grammar, options);
               expect(parser).toFailToParse(testcases[i].input);
             }
           });
@@ -525,7 +525,7 @@ describe("generated parser behavior", function() {
 
         describe("in outer sequence", function() {
           it("can access variables defined by preceding labeled elements", function() {
-            var parser = PEG.buildParser(
+            var parser = peg.buildParser(
                   'start = a:"a" ("b" &{ return a === "a"; })',
                   options
                 );
@@ -534,7 +534,7 @@ describe("generated parser behavior", function() {
           });
 
           it("cannot access variable defined by labeled predicate element", function() {
-            var parser = PEG.buildParser(
+            var parser = peg.buildParser(
                   'start = "a" b:("b" &{ return b === undefined; }) "c"',
                   options
                 );
@@ -543,7 +543,7 @@ describe("generated parser behavior", function() {
           });
 
           it("cannot access variables defined by following labeled elements", function() {
-            var parser = PEG.buildParser(
+            var parser = peg.buildParser(
                   'start = ("a" &{ return b === "b"; }) b:"b"',
                   options
                 );
@@ -555,7 +555,7 @@ describe("generated parser behavior", function() {
 
       describe("initializer variables & functions", function() {
         it("can access variables defined in the initializer", function() {
-          var parser = PEG.buildParser([
+          var parser = peg.buildParser([
                 '{ var v = 42 }',
                 'start = &{ return v === 42; }'
               ].join("\n"), options);
@@ -564,7 +564,7 @@ describe("generated parser behavior", function() {
         });
 
         it("can access functions defined in the initializer", function() {
-          var parser = PEG.buildParser([
+          var parser = peg.buildParser([
                 '{ function f() { return 42; } }',
                 'start = &{ return f() === 42; }'
               ].join("\n"), options);
@@ -575,7 +575,7 @@ describe("generated parser behavior", function() {
 
       describe("available variables & functions", function() {
         it("|parser| contains the parser object", function() {
-          var parser = PEG.buildParser([
+          var parser = peg.buildParser([
                 '{ var result; }',
                 'start = &{ result = parser; return true; } { return result; }'
               ].join("\n"), options);
@@ -584,7 +584,7 @@ describe("generated parser behavior", function() {
         });
 
         it("|options| contains options", function() {
-          var parser = PEG.buildParser([
+          var parser = peg.buildParser([
                 '{ var result; }',
                 'start = &{ result = options; return true; } { return result; }'
               ].join("\n"), options);
@@ -593,7 +593,7 @@ describe("generated parser behavior", function() {
         });
 
         it("|location| returns current location info", function() {
-          var parser = PEG.buildParser([
+          var parser = peg.buildParser([
                 '{ var result; }',
                 'start  = line (nl+ line)* { return result; }',
                 'line   = thing (" "+ thing)*',
@@ -629,7 +629,7 @@ describe("generated parser behavior", function() {
            * |undefined| which we can't compare against in |toParse| due to the
            * way optional parameters work.
            */
-          var parser = PEG.buildParser('start = !{ return false; } ""', options);
+          var parser = peg.buildParser('start = !{ return false; } ""', options);
 
           expect(parser).toParse("", [undefined, ""]);
         });
@@ -637,7 +637,7 @@ describe("generated parser behavior", function() {
 
       describe("when the code returns a truthy value", function() {
         it("reports match failure", function() {
-          var parser = PEG.buildParser('start = !{ return true; }', options);
+          var parser = peg.buildParser('start = !{ return true; }', options);
 
           expect(parser).toFailToParse("");
         });
@@ -646,7 +646,7 @@ describe("generated parser behavior", function() {
       describe("label variables", function() {
         describe("in containing sequence", function() {
           it("can access variables defined by preceding labeled elements", function() {
-            var parser = PEG.buildParser(
+            var parser = peg.buildParser(
                   'start = a:"a" !{ return a !== "a"; }',
                   options
                 );
@@ -655,7 +655,7 @@ describe("generated parser behavior", function() {
           });
 
           it("cannot access variable defined by labeled predicate element", function() {
-            var parser = PEG.buildParser(
+            var parser = peg.buildParser(
                   'start = "a" b:!{ return b !== undefined; } "c"',
                   options
                 );
@@ -664,7 +664,7 @@ describe("generated parser behavior", function() {
           });
 
           it("cannot access variables defined by following labeled elements", function() {
-            var parser = PEG.buildParser(
+            var parser = peg.buildParser(
                   'start = !{ return a !== "a"; } a:"a"',
                   options
                 );
@@ -722,7 +722,7 @@ describe("generated parser behavior", function() {
                 parser, i;
 
             for (i = 0; i < testcases.length; i++) {
-              parser = PEG.buildParser(testcases[i].grammar, options);
+              parser = peg.buildParser(testcases[i].grammar, options);
               expect(parser).toFailToParse(testcases[i].input);
             }
           });
@@ -730,7 +730,7 @@ describe("generated parser behavior", function() {
 
         describe("in outer sequence", function() {
           it("can access variables defined by preceding labeled elements", function() {
-            var parser = PEG.buildParser(
+            var parser = peg.buildParser(
                   'start = a:"a" ("b" !{ return a !== "a"; })',
                   options
                 );
@@ -739,7 +739,7 @@ describe("generated parser behavior", function() {
           });
 
           it("cannot access variable defined by labeled predicate element", function() {
-            var parser = PEG.buildParser(
+            var parser = peg.buildParser(
                   'start = "a" b:("b" !{ return b !== undefined; }) "c"',
                   options
                 );
@@ -748,7 +748,7 @@ describe("generated parser behavior", function() {
           });
 
           it("cannot access variables defined by following labeled elements", function() {
-            var parser = PEG.buildParser(
+            var parser = peg.buildParser(
                   'start = ("a" !{ return b !== "b"; }) b:"b"',
                   options
                 );
@@ -760,7 +760,7 @@ describe("generated parser behavior", function() {
 
       describe("initializer variables & functions", function() {
         it("can access variables defined in the initializer", function() {
-          var parser = PEG.buildParser([
+          var parser = peg.buildParser([
                 '{ var v = 42 }',
                 'start = !{ return v !== 42; }'
               ].join("\n"), options);
@@ -769,7 +769,7 @@ describe("generated parser behavior", function() {
         });
 
         it("can access functions defined in the initializer", function() {
-          var parser = PEG.buildParser([
+          var parser = peg.buildParser([
                 '{ function f() { return 42; } }',
                 'start = !{ return f() !== 42; }'
               ].join("\n"), options);
@@ -780,7 +780,7 @@ describe("generated parser behavior", function() {
 
       describe("available variables & functions", function() {
         it("|parser| contains the parser object", function() {
-          var parser = PEG.buildParser([
+          var parser = peg.buildParser([
                 '{ var result; }',
                 'start = !{ result = parser; return false; } { return result; }'
               ].join("\n"), options);
@@ -789,7 +789,7 @@ describe("generated parser behavior", function() {
         });
 
         it("|options| contains options", function() {
-          var parser = PEG.buildParser([
+          var parser = peg.buildParser([
                 '{ var result; }',
                 'start = !{ result = options; return false; } { return result; }'
               ].join("\n"), options);
@@ -798,7 +798,7 @@ describe("generated parser behavior", function() {
         });
 
         it("|location| returns current location info", function() {
-          var parser = PEG.buildParser([
+          var parser = peg.buildParser([
                 '{ var result; }',
                 'start  = line (nl+ line)* { return result; }',
                 'line   = thing (" "+ thing)*',
@@ -829,7 +829,7 @@ describe("generated parser behavior", function() {
     describe("group", function() {
       describe("when the expression matches", function() {
         it("returns its match result", function() {
-          var parser = PEG.buildParser('start = ("a")', options);
+          var parser = peg.buildParser('start = ("a")', options);
 
           expect(parser).toParse("a", "a");
         });
@@ -837,7 +837,7 @@ describe("generated parser behavior", function() {
 
       describe("when the expression doesn't match", function() {
         it("reports match failure", function() {
-          var parser = PEG.buildParser('start = ("a")', options);
+          var parser = peg.buildParser('start = ("a")', options);
 
           expect(parser).toFailToParse("b");
         });
@@ -847,7 +847,7 @@ describe("generated parser behavior", function() {
     describe("optional", function() {
       describe("when the expression matches", function() {
         it("returns its match result", function() {
-          var parser = PEG.buildParser('start = "a"?', options);
+          var parser = peg.buildParser('start = "a"?', options);
 
           expect(parser).toParse("a", "a");
         });
@@ -855,7 +855,7 @@ describe("generated parser behavior", function() {
 
       describe("when the expression doesn't match", function() {
         it("returns |null|", function() {
-          var parser = PEG.buildParser('start = "a"?', options);
+          var parser = peg.buildParser('start = "a"?', options);
 
           expect(parser).toParse("", null);
         });
@@ -865,7 +865,7 @@ describe("generated parser behavior", function() {
     describe("zero or more", function() {
       describe("when the expression matches zero or more times", function() {
         it("returns an array of its match results", function() {
-          var parser = PEG.buildParser('start = "a"*', options);
+          var parser = peg.buildParser('start = "a"*', options);
 
           expect(parser).toParse("",    []);
           expect(parser).toParse("a",   ["a"]);
@@ -877,7 +877,7 @@ describe("generated parser behavior", function() {
     describe("one or more", function() {
       describe("when the expression matches one or more times", function() {
         it("returns an array of its match results", function() {
-          var parser = PEG.buildParser('start = "a"+', options);
+          var parser = peg.buildParser('start = "a"+', options);
 
           expect(parser).toParse("a",   ["a"]);
           expect(parser).toParse("aaa", ["a", "a", "a"]);
@@ -886,7 +886,7 @@ describe("generated parser behavior", function() {
 
       describe("when the expression doesn't match", function() {
         it("reports match failure", function() {
-          var parser = PEG.buildParser('start = "a"+', options);
+          var parser = peg.buildParser('start = "a"+', options);
 
           expect(parser).toFailToParse("");
         });
@@ -896,7 +896,7 @@ describe("generated parser behavior", function() {
     describe("text", function() {
       describe("when the expression matches", function() {
         it("returns the matched text", function() {
-          var parser = PEG.buildParser('start = $("a" "b" "c")', options);
+          var parser = peg.buildParser('start = $("a" "b" "c")', options);
 
           expect(parser).toParse("abc", "abc");
         });
@@ -904,7 +904,7 @@ describe("generated parser behavior", function() {
 
       describe("when the expression doesn't match", function() {
         it("reports match failure", function() {
-          var parser = PEG.buildParser('start = $("a")', options);
+          var parser = peg.buildParser('start = $("a")', options);
 
           expect(parser).toFailToParse("b");
         });
@@ -914,13 +914,13 @@ describe("generated parser behavior", function() {
     describe("positive simple predicate", function() {
       describe("when the expression matches", function() {
         it("returns |undefined|", function() {
-          var parser = PEG.buildParser('start = &"a" "a"', options);
+          var parser = peg.buildParser('start = &"a" "a"', options);
 
           expect(parser).toParse("a", [undefined, "a"]);
         });
 
         it("resets parse position", function() {
-          var parser = PEG.buildParser('start = &"a" "a"', options);
+          var parser = peg.buildParser('start = &"a" "a"', options);
 
           expect(parser).toParse("a");
         });
@@ -928,13 +928,13 @@ describe("generated parser behavior", function() {
 
       describe("when the expression doesn't match", function() {
         it("reports match failure", function() {
-          var parser = PEG.buildParser('start = &"a"', options);
+          var parser = peg.buildParser('start = &"a"', options);
 
           expect(parser).toFailToParse("b");
         });
 
         it("discards any expectations recorded when matching the expression", function() {
-          var parser = PEG.buildParser('start = "a" / &"b" / "c"', options);
+          var parser = peg.buildParser('start = "a" / &"b" / "c"', options);
 
           expect(parser).toFailToParse("d", {
             expected: [
@@ -949,7 +949,7 @@ describe("generated parser behavior", function() {
     describe("negative simple predicate", function() {
       describe("when the expression matches", function() {
         it("reports match failure", function() {
-          var parser = PEG.buildParser('start = !"a"', options);
+          var parser = peg.buildParser('start = !"a"', options);
 
           expect(parser).toFailToParse("a");
         });
@@ -957,19 +957,19 @@ describe("generated parser behavior", function() {
 
       describe("when the expression doesn't match", function() {
         it("returns |undefined|", function() {
-          var parser = PEG.buildParser('start = !"a" "b"', options);
+          var parser = peg.buildParser('start = !"a" "b"', options);
 
           expect(parser).toParse("b", [undefined, "b"]);
         });
 
         it("resets parse position", function() {
-          var parser = PEG.buildParser('start = !"a" "b"', options);
+          var parser = peg.buildParser('start = !"a" "b"', options);
 
           expect(parser).toParse("b");
         });
 
         it("discards any expectations recorded when matching the expression", function() {
-          var parser = PEG.buildParser('start = "a" / !"b" / "c"', options);
+          var parser = peg.buildParser('start = "a" / !"b" / "c"', options);
 
           expect(parser).toFailToParse("b", {
             expected: [
@@ -984,7 +984,7 @@ describe("generated parser behavior", function() {
     describe("label", function() {
       describe("when the expression matches", function() {
         it("returns its match result", function() {
-          var parser = PEG.buildParser('start = a:"a"', options);
+          var parser = peg.buildParser('start = a:"a"', options);
 
           expect(parser).toParse("a", "a");
         });
@@ -992,7 +992,7 @@ describe("generated parser behavior", function() {
 
       describe("when the expression doesn't match", function() {
         it("reports match failure", function() {
-          var parser = PEG.buildParser('start = a:"a"', options);
+          var parser = peg.buildParser('start = a:"a"', options);
 
           expect(parser).toFailToParse("b");
         });
@@ -1002,7 +1002,7 @@ describe("generated parser behavior", function() {
     describe("sequence", function() {
       describe("when all expressions match", function() {
         it("returns an array of their match results", function() {
-          var parser = PEG.buildParser('start = "a" "b" "c"', options);
+          var parser = peg.buildParser('start = "a" "b" "c"', options);
 
           expect(parser).toParse("abc", ["a", "b", "c"]);
         });
@@ -1010,7 +1010,7 @@ describe("generated parser behavior", function() {
 
       describe("when any expression doesn't match", function() {
         it("reports match failure", function() {
-          var parser = PEG.buildParser('start = "a" "b" "c"', options);
+          var parser = peg.buildParser('start = "a" "b" "c"', options);
 
           expect(parser).toFailToParse("dbc");
           expect(parser).toFailToParse("adc");
@@ -1018,7 +1018,7 @@ describe("generated parser behavior", function() {
         });
 
         it("resets parse position", function() {
-          var parser = PEG.buildParser('start = "a" "b" / "a"', options);
+          var parser = peg.buildParser('start = "a" "b" / "a"', options);
 
           expect(parser).toParse("a", "a");
         });
@@ -1028,7 +1028,7 @@ describe("generated parser behavior", function() {
     describe("action", function() {
       describe("when the expression matches", function() {
         it("returns the value returned by the code", function() {
-          var parser = PEG.buildParser('start = "a" { return 42; }', options);
+          var parser = peg.buildParser('start = "a" { return 42; }', options);
 
           expect(parser).toParse("a", 42);
         });
@@ -1036,13 +1036,13 @@ describe("generated parser behavior", function() {
         describe("label variables", function() {
           describe("in the expression", function() {
             it("can access variable defined by labeled expression", function() {
-              var parser = PEG.buildParser('start = a:"a" { return a; }', options);
+              var parser = peg.buildParser('start = a:"a" { return a; }', options);
 
               expect(parser).toParse("a", "a");
             });
 
             it("can access variables defined by labeled sequence elements", function() {
-              var parser = PEG.buildParser(
+              var parser = peg.buildParser(
                     'start = a:"a" b:"b" c:"c" { return [a, b, c]; }',
                     options
                   );
@@ -1100,7 +1100,7 @@ describe("generated parser behavior", function() {
                   parser, i;
 
               for (i = 0; i < testcases.length; i++) {
-                parser = PEG.buildParser(testcases[i].grammar, options);
+                parser = peg.buildParser(testcases[i].grammar, options);
                 expect(parser).toFailToParse(testcases[i].input);
               }
             });
@@ -1108,7 +1108,7 @@ describe("generated parser behavior", function() {
 
           describe("in outer sequence", function() {
             it("can access variables defined by preceding labeled elements", function() {
-              var parser = PEG.buildParser(
+              var parser = peg.buildParser(
                     'start = a:"a" ("b" { return a; })',
                     options
                   );
@@ -1117,7 +1117,7 @@ describe("generated parser behavior", function() {
             });
 
             it("cannot access variable defined by labeled action element", function() {
-              var parser = PEG.buildParser(
+              var parser = peg.buildParser(
                     'start = "a" b:("b" { return b; }) c:"c"',
                     options
                   );
@@ -1126,7 +1126,7 @@ describe("generated parser behavior", function() {
             });
 
             it("cannot access variables defined by following labeled elements", function() {
-              var parser = PEG.buildParser(
+              var parser = peg.buildParser(
                     'start = ("a" { return b; }) b:"b"',
                     options
                   );
@@ -1138,7 +1138,7 @@ describe("generated parser behavior", function() {
 
         describe("initializer variables & functions", function() {
           it("can access variables defined in the initializer", function() {
-            var parser = PEG.buildParser([
+            var parser = peg.buildParser([
                   '{ var v = 42 }',
                   'start = "a" { return v; }'
                 ].join("\n"), options);
@@ -1147,7 +1147,7 @@ describe("generated parser behavior", function() {
           });
 
           it("can access functions defined in the initializer", function() {
-            var parser = PEG.buildParser([
+            var parser = peg.buildParser([
                   '{ function f() { return 42; } }',
                   'start = "a" { return f(); }'
                 ].join("\n"), options);
@@ -1158,7 +1158,7 @@ describe("generated parser behavior", function() {
 
         describe("available variables & functions", function() {
           it("|parser| contains the parser object", function() {
-            var parser = PEG.buildParser(
+            var parser = peg.buildParser(
                   'start = "a" { return parser; }',
                   options
                 );
@@ -1167,7 +1167,7 @@ describe("generated parser behavior", function() {
           });
 
           it("|options| contains options", function() {
-            var parser = PEG.buildParser(
+            var parser = peg.buildParser(
                   'start = "a" { return options; }',
                   options
                 );
@@ -1176,7 +1176,7 @@ describe("generated parser behavior", function() {
           });
 
           it("|text| returns text matched by the expression", function() {
-            var parser = PEG.buildParser(
+            var parser = peg.buildParser(
                   'start = "a" { return text(); }',
                   options
                 );
@@ -1185,7 +1185,7 @@ describe("generated parser behavior", function() {
           });
 
           it("|location| returns location info of the expression", function() {
-            var parser = PEG.buildParser([
+            var parser = peg.buildParser([
                   '{ var result; }',
                   'start  = line (nl+ line)* { return result; }',
                   'line   = thing (" "+ thing)*',
@@ -1213,7 +1213,7 @@ describe("generated parser behavior", function() {
 
           describe("|expected|", function() {
             it("terminates parsing and throws an exception", function() {
-              var parser = PEG.buildParser(
+              var parser = peg.buildParser(
                     'start = "a" { expected("a"); }',
                     options
                   );
@@ -1229,7 +1229,7 @@ describe("generated parser behavior", function() {
             });
 
             it("allows to set custom location info", function() {
-              var parser = PEG.buildParser([
+              var parser = peg.buildParser([
                     'start = "a" {',
                     '  expected("a", {',
                     '    start: { offset: 1, line: 1, column: 2 },',
@@ -1251,7 +1251,7 @@ describe("generated parser behavior", function() {
 
           describe("|error|", function() {
             it("terminates parsing and throws an exception", function() {
-              var parser = PEG.buildParser(
+              var parser = peg.buildParser(
                     'start = "a" { error("a"); }',
                     options
                   );
@@ -1267,7 +1267,7 @@ describe("generated parser behavior", function() {
             });
 
             it("allows to set custom location info", function() {
-              var parser = PEG.buildParser([
+              var parser = peg.buildParser([
                     'start = "a" {',
                     '  error("a", {',
                     '    start: { offset: 1, line: 1, column: 2 },',
@@ -1291,13 +1291,13 @@ describe("generated parser behavior", function() {
 
       describe("when the expression doesn't match", function() {
         it("reports match failure", function() {
-          var parser = PEG.buildParser('start = "a" { return 42; }', options);
+          var parser = peg.buildParser('start = "a" { return 42; }', options);
 
           expect(parser).toFailToParse("b");
         });
 
         it("doesn't execute the code", function() {
-          var parser = PEG.buildParser(
+          var parser = peg.buildParser(
                 'start = "a" { throw "Boom!"; } / "b"',
                 options
               );
@@ -1310,7 +1310,7 @@ describe("generated parser behavior", function() {
     describe("choice", function() {
       describe("when any expression matches", function() {
         it("returns its match result", function() {
-          var parser = PEG.buildParser('start = "a" / "b" / "c"', options);
+          var parser = peg.buildParser('start = "a" / "b" / "c"', options);
 
           expect(parser).toParse("a", "a");
           expect(parser).toParse("b", "b");
@@ -1320,7 +1320,7 @@ describe("generated parser behavior", function() {
 
       describe("when all expressions don't match", function() {
         it("reports match failure", function() {
-          var parser = PEG.buildParser('start = "a" / "b" / "c"', options);
+          var parser = peg.buildParser('start = "a" / "b" / "c"', options);
 
           expect(parser).toFailToParse("d");
         });
@@ -1330,7 +1330,7 @@ describe("generated parser behavior", function() {
     describe("error reporting", function() {
       describe("behavior", function() {
         it("reports only the rightmost error", function() {
-          var parser = PEG.buildParser('start = "a" "b" / "a" "c" "d"', options);
+          var parser = peg.buildParser('start = "a" "b" / "a" "c" "d"', options);
 
           expect(parser).toFailToParse("ace", {
             expected: [{ type: "literal", value: "d", description: '"d"' }]
@@ -1340,7 +1340,7 @@ describe("generated parser behavior", function() {
 
       describe("expectations reporting", function() {
         it("reports expectations correctly with no alternative", function() {
-          var parser = PEG.buildParser('start = "a"', options);
+          var parser = peg.buildParser('start = "a"', options);
 
           expect(parser).toFailToParse("ab", {
             expected: [{ type: "end", description: "end of input" }]
@@ -1348,7 +1348,7 @@ describe("generated parser behavior", function() {
         });
 
         it("reports expectations correctly with one alternative", function() {
-          var parser = PEG.buildParser('start = "a"', options);
+          var parser = peg.buildParser('start = "a"', options);
 
           expect(parser).toFailToParse("b", {
             expected: [{ type: "literal", value: "a", description: '"a"' }]
@@ -1356,7 +1356,7 @@ describe("generated parser behavior", function() {
         });
 
         it("reports expectations correctly with multiple alternatives", function() {
-          var parser = PEG.buildParser('start = "a" / "b" / "c"', options);
+          var parser = peg.buildParser('start = "a" / "b" / "c"', options);
 
           expect(parser).toFailToParse("d", {
             expected: [
@@ -1375,7 +1375,7 @@ describe("generated parser behavior", function() {
            *
            * See https://github.com/pegjs/pegjs/pull/146.
            */
-          var parser = PEG.buildParser('start = "a" / "a" / "a"', options);
+          var parser = peg.buildParser('start = "a" / "a" / "a"', options);
 
           expect(parser).toFailToParse("b", {
             expected: [{ type: "literal", value: "a", description: '"a"' }]
@@ -1383,7 +1383,7 @@ describe("generated parser behavior", function() {
         });
 
         it("sorts expectations", function() {
-          var parser = PEG.buildParser('start = "c" / "b" / "a"', options);
+          var parser = peg.buildParser('start = "c" / "b" / "a"', options);
 
           expect(parser).toFailToParse("d", {
             expected: [
@@ -1397,7 +1397,7 @@ describe("generated parser behavior", function() {
 
       describe("message building", function() {
         it("builds message correctly with no alternative", function() {
-          var parser = PEG.buildParser('start = "a"', options);
+          var parser = peg.buildParser('start = "a"', options);
 
           expect(parser).toFailToParse("ab", {
             message: 'Expected end of input.'
@@ -1405,7 +1405,7 @@ describe("generated parser behavior", function() {
         });
 
         it("builds message correctly with one alternative", function() {
-          var parser = PEG.buildParser('start = "a"', options);
+          var parser = peg.buildParser('start = "a"', options);
 
           expect(parser).toFailToParse("b", {
             message: 'Expected "a".'
@@ -1413,7 +1413,7 @@ describe("generated parser behavior", function() {
         });
 
         it("builds message correctly with multiple alternatives", function() {
-          var parser = PEG.buildParser('start = "a" / "b" / "c"', options);
+          var parser = peg.buildParser('start = "a" / "b" / "c"', options);
 
           expect(parser).toFailToParse("d", {
             message: 'Expected "a", "b" or "c".'
@@ -1423,7 +1423,7 @@ describe("generated parser behavior", function() {
 
       describe("position reporting", function() {
         it("reports position correctly with no trailing input", function() {
-          var parser = PEG.buildParser('start = "a"', options);
+          var parser = peg.buildParser('start = "a"', options);
 
           expect(parser).toFailToParse("b", {
             location: {
@@ -1434,7 +1434,7 @@ describe("generated parser behavior", function() {
         });
 
         it("reports position correctly with trailing input", function() {
-          var parser = PEG.buildParser('start = "a"', options);
+          var parser = peg.buildParser('start = "a"', options);
 
           expect(parser).toFailToParse("aa", {
             location: {
@@ -1445,7 +1445,7 @@ describe("generated parser behavior", function() {
         });
 
         it("reports position correctly in complex cases", function() {
-          var parser = PEG.buildParser([
+          var parser = peg.buildParser([
                 'start  = line (nl+ line)*',
                 'line   = digit (" "+ digit)*',
                 'digit  = [0-9]',
@@ -1488,7 +1488,7 @@ describe("generated parser behavior", function() {
          * Sum     ← Product (('+' / '-') Product)*
          * Expr    ← Sum
          */
-        var parser = PEG.buildParser([
+        var parser = peg.buildParser([
               'Expr    = Sum',
               'Sum     = first:Product rest:(("+" / "-") Product)* {',
               '            var result = first, i;',
@@ -1544,7 +1544,7 @@ describe("generated parser behavior", function() {
          * A ← a A? b
          * B ← b B? c
          */
-        var parser = PEG.buildParser([
+        var parser = peg.buildParser([
               'S = &(A "c") a:"a"+ B:B !("a" / "b" / "c") { return a.join("") + B; }',
               'A = a:"a" A:A? b:"b" { return [a, A, b].join(""); }',
               'B = b:"b" B:B? c:"c" { return [b, B, c].join(""); }'
@@ -1568,7 +1568,7 @@ describe("generated parser behavior", function() {
          * N ← C / (!Begin !End Z)
          * Z ← any single character
          */
-        var parser = PEG.buildParser([
+        var parser = peg.buildParser([
               'C     = begin:Begin ns:N* end:End { return begin + ns.join("") + end; }',
               'N     = C',
               '      / !Begin !End z:Z { return z; }',
diff --git a/spec/helpers.js b/spec/helpers.js
index 74e0e8b..3e60a00 100644
--- a/spec/helpers.js
+++ b/spec/helpers.js
@@ -4,6 +4,6 @@
 
 (function(root) {
   if (typeof module !== 'undefined') {
-    root.PEG = require("../lib/peg.js");
+    root.peg = require("../lib/peg.js");
   }
 }(this));
diff --git a/spec/unit/compiler/passes/generate-bytecode.spec.js b/spec/unit/compiler/passes/generate-bytecode.spec.js
index 1c5ac15..9432fb4 100644
--- a/spec/unit/compiler/passes/generate-bytecode.spec.js
+++ b/spec/unit/compiler/passes/generate-bytecode.spec.js
@@ -1,9 +1,9 @@
-/* global PEG */
+/* global peg */
 
 "use strict";
 
 describe("compiler pass |generateBytecode|", function() {
-  var pass = PEG.compiler.passes.generate.generateBytecode;
+  var pass = peg.compiler.passes.generate.generateBytecode;
 
   function bytecodeDetails(bytecode) {
     return {
diff --git a/spec/unit/compiler/passes/helpers.js b/spec/unit/compiler/passes/helpers.js
index 504ca18..42fb606 100644
--- a/spec/unit/compiler/passes/helpers.js
+++ b/spec/unit/compiler/passes/helpers.js
@@ -1,4 +1,4 @@
-/* global PEG */
+/* global peg */
 
 "use strict";
 
@@ -44,7 +44,7 @@ beforeEach(function() {
         }
       }
 
-      var ast = PEG.parser.parse(grammar);
+      var ast = peg.parser.parse(grammar);
 
       this.actual(ast, options);
 
@@ -61,7 +61,7 @@ beforeEach(function() {
     },
 
     toReportError: function(grammar, details) {
-      var ast = PEG.parser.parse(grammar);
+      var ast = peg.parser.parse(grammar);
 
       try {
         this.actual(ast);
diff --git a/spec/unit/compiler/passes/remove-proxy-rules.spec.js b/spec/unit/compiler/passes/remove-proxy-rules.spec.js
index a2c7dbc..2db4a13 100644
--- a/spec/unit/compiler/passes/remove-proxy-rules.spec.js
+++ b/spec/unit/compiler/passes/remove-proxy-rules.spec.js
@@ -1,9 +1,9 @@
-/* global PEG */
+/* global peg */
 
 "use strict";
 
 describe("compiler pass |removeProxyRules|", function() {
-  var pass = PEG.compiler.passes.transform.removeProxyRules;
+  var pass = peg.compiler.passes.transform.removeProxyRules;
 
   describe("when a proxy rule isn't listed in |allowedStartRules|", function() {
     it("updates references and removes it", function() {
diff --git a/spec/unit/compiler/passes/report-infinite-loops.spec.js b/spec/unit/compiler/passes/report-infinite-loops.spec.js
index c700335..28ba3b6 100644
--- a/spec/unit/compiler/passes/report-infinite-loops.spec.js
+++ b/spec/unit/compiler/passes/report-infinite-loops.spec.js
@@ -1,9 +1,9 @@
-/* global PEG */
+/* global peg */
 
 "use strict";
 
 describe("compiler pass |reportInfiniteLoops|", function() {
-  var pass = PEG.compiler.passes.check.reportInfiniteLoops;
+  var pass = peg.compiler.passes.check.reportInfiniteLoops;
 
   it("reports infinite loops for zero_or_more", function() {
     expect(pass).toReportError('start = ("")*', {
diff --git a/spec/unit/compiler/passes/report-left-recursion.spec.js b/spec/unit/compiler/passes/report-left-recursion.spec.js
index 7ad62f0..9af0b3c 100644
--- a/spec/unit/compiler/passes/report-left-recursion.spec.js
+++ b/spec/unit/compiler/passes/report-left-recursion.spec.js
@@ -1,9 +1,9 @@
-/* global PEG */
+/* global peg */
 
 "use strict";
 
 describe("compiler pass |reportLeftRecursion|", function() {
-  var pass = PEG.compiler.passes.check.reportLeftRecursion;
+  var pass = peg.compiler.passes.check.reportLeftRecursion;
 
   it("reports direct left recursion", function() {
     expect(pass).toReportError('start = start', {
diff --git a/spec/unit/compiler/passes/report-missing-rules.spec.js b/spec/unit/compiler/passes/report-missing-rules.spec.js
index 5c56885..a5dd268 100644
--- a/spec/unit/compiler/passes/report-missing-rules.spec.js
+++ b/spec/unit/compiler/passes/report-missing-rules.spec.js
@@ -1,9 +1,9 @@
-/* global PEG */
+/* global peg */
 
 "use strict";
 
 describe("compiler pass |reportMissingRules|", function() {
-  var pass = PEG.compiler.passes.check.reportMissingRules;
+  var pass = peg.compiler.passes.check.reportMissingRules;
 
   it("reports missing rules", function() {
     expect(pass).toReportError('start = missing', {
diff --git a/spec/unit/parser.spec.js b/spec/unit/parser.spec.js
index 4df7995..8c08c75 100644
--- a/spec/unit/parser.spec.js
+++ b/spec/unit/parser.spec.js
@@ -1,4 +1,4 @@
-/* global PEG */
+/* global peg */
 
 "use strict";
 
@@ -182,7 +182,7 @@ describe("PEG.js grammar parser", function() {
         var result;
 
         try {
-          result = PEG.parser.parse(this.actual);
+          result = peg.parser.parse(this.actual);
 
           stripLocation(result);
 
@@ -210,7 +210,7 @@ describe("PEG.js grammar parser", function() {
         var result;
 
         try {
-          result = PEG.parser.parse(this.actual);
+          result = peg.parser.parse(this.actual);
 
           stripLocation(result);