diff --git a/Objective-J/Preprocessor.js b/Objective-J/Preprocessor.js
index 88dfda08e..5b14dac32 100644
--- a/Objective-J/Preprocessor.js
+++ b/Objective-J/Preprocessor.js
@@ -681,7 +681,7 @@ Preprocessor.prototype.method = function(/*Lexer*/ tokens, ivar_names)
             parameters[parameters.length] = token;
 
             if (token in ivar_names)
-                throw new SyntaxError(this.error_message("*** Method ( "+selector+" ) uses a parameter name that is already in use ( "+token+" )"));
+                CPLog.warn(this.error_message("*** Warning: Method ( "+selector+" ) uses a parameter name that is already in use ( "+token+" )"));
         }
         else if (token == TOKEN_OPEN_PARENTHESIS)
         {
diff --git a/Tests/Objective-J/Preprocessor/BehaviorTests/InheritanceTest.j b/Tests/Objective-J/Preprocessor/BehaviorTests/InheritanceTest.j
new file mode 100644
index 000000000..5fcd7b5f4
--- /dev/null
+++ b/Tests/Objective-J/Preprocessor/BehaviorTests/InheritanceTest.j
@@ -0,0 +1,131 @@
+@import <Foundation/Foundation.j>
+
+@implementation ParentClass : CPObject
+{
+    id ivar;
+}
+
+- (CPString)classNameString
+{
+    return @"ParentClass";
+}
+
+@end
+
+@implementation ChildClass : ParentClass
+{
+}
+
+- (id)ivar
+{
+    return ivar;
+}
+
+- (void)setIvar:(id)newValue
+{
+    ivar = newValue;
+}
+
+- (CPString)classNameString
+{
+    return @"ChildClass";
+}
+
+- (CPString)parentClassNameString
+{
+    return [super classNameString];
+}
+
+@end
+
+@implementation GrandChildClass : ChildClass
+{
+}
+
+- (CPString)classNameString
+{
+    return @"GrandChildClass";
+}
+
+- (CPString)parentClassNameString
+{
+    return [super classNameString];
+}
+
+- (CPString)grandParentClassNameString
+{
+    return [super parentClassNameString];
+}
+
+@end
+
+@implementation InheritanceTest : OJTestCase
+{
+    ParentClass parentClass;
+    ChildClass childClass;
+    GrandChildClass grandChildClass;
+}
+
+- (void)setUp
+{
+    parentClass = [[ParentClass alloc] init];
+    childClass = [[ChildClass alloc] init];
+    grandChildClass = [[GrandChildClass alloc] init];
+}
+
+- (void)testIvarInheritance
+{
+    [self assert:nil equals:parentClass.ivar];
+    [self assert:nil equals:childClass.ivar];
+    [self assert:nil equals:grandChildClass.ivar];
+
+    parentClass.ivar = 1;
+    childClass.ivar = 2;
+    grandChildClass.ivar = 3;
+
+    [self assert:1 equals:parentClass.ivar];
+    [self assert:2 equals:childClass.ivar];
+    [self assert:3 equals:grandChildClass.ivar];
+}
+
+- (void)testIvarIndependence
+{
+    parentClass.ivar = 1;
+    [self assert:1 equals:parentClass.ivar];
+    [self assert:nil equals:childClass.ivar];
+    [self assert:nil equals:grandChildClass.ivar];
+
+    childClass.ivar = 2;
+    [self assert:1 equals:parentClass.ivar];
+    [self assert:2 equals:childClass.ivar];
+    [self assert:nil equals:grandChildClass.ivar];
+
+    grandChildClass.ivar = 3;
+    [self assert:1 equals:parentClass.ivar];
+    [self assert:2 equals:childClass.ivar];
+    [self assert:3 equals:grandChildClass.ivar];
+}
+
+- (void)testMethodInheritance
+{
+    [self assertThrows:function()
+    {
+        [parentClass setIvar:5];
+    }];
+    [childClass setIvar:5];
+    [grandChildClass setIvar:10];
+    [self assert:nil equals:parentClass.ivar];
+    [self assert:5 equals:childClass.ivar];
+    [self assert:10 equals:grandChildClass.ivar];
+}
+
+- (void)testSuper
+{
+    [self assert:@"ParentClass" equals:[parentClass classNameString]];
+    [self assert:@"ParentClass" equals:[childClass parentClassNameString]];
+    [self assert:@"ParentClass" equals:[grandChildClass grandParentClassNameString]];
+}
+
+@end
+
+
diff --git a/Tests/Objective-J/Preprocessor/BehaviorTests/IvarTest.j b/Tests/Objective-J/Preprocessor/BehaviorTests/IvarTest.j
new file mode 100644
index 000000000..d0c38aad9
--- /dev/null
+++ b/Tests/Objective-J/Preprocessor/BehaviorTests/IvarTest.j
@@ -0,0 +1,117 @@
+@import <Foundation/Foundation.j>
+
+@implementation IvarTestClass : CPObject
+{
+    id ivar1 @accessors;
+    var ivar2 @accessors(readonly);
+    CPNumber ivar3;
+}
+
+- (void)setIvar1UsingEval:(id)value
+{
+    eval(@"var ivar1 = " + value);
+}
+
+- (void)doNothingToIvar1UsingEval:(id)value
+{
+    (function()
+    {
+        eval(@"var ivar1 = " + value);
+    })();
+}
+
+- (void)setIvar1DespiteAWithStatement:(id)value
+{
+    with({})
+    {
+        ivar1 = value;
+    }
+}
+
+- (void)doNothingToIvar1BecauseOfWithStatement:(id)value
+{
+    with({'ivar1':null})
+    {
+        ivar1 = value;
+    }
+}
+
+- (void)setIvar1UsingAShadowingLocalVariable:(id)ivar1
+{
+    self.ivar1 = ivar1;
+}
+
+@end
+
+@implementation IvarTest : OJTestCase
+{
+    IvarTestClass testClass;
+}
+
+- (void)setUp
+{
+    testClass = [[IvarTestClass alloc] init];
+}
+
+- (void)testDirectAccess
+{
+    [self assert:nil equals:testClass.ivar1];
+    testClass.ivar1 = 5;
+    [self assert:5 equals:testClass.ivar1];
+}
+
+- (void)testWithStatementInMethod
+{
+    [self assert:nil equals:testClass.ivar1];
+    [testClass setIvar1DespiteAWithStatement:5];
+    [self assert:5 equals:testClass.ivar1];
+    [testClass doNothingToIvar1BecauseOfWithStatement:10];
+    [self assert:5 equals:testClass.ivar1];
+}
+
+- (void)testEvalInMethod
+{
+    [self assert:nil equals:testClass.ivar1];
+    [testClass setIvar1UsingEval:5];
+    [self assert:5 equals:testClass.ivar1];
+    [testClass doNothingToIvar1UsingEval:10];
+    [self assert:5 equals:testClass.ivar1];
+}
+
+- (void)testIvarShadowing
+{
+    [self assert:nil equals:testClass.ivar1];
+    [testClass setIvar1UsingAShadowingLocalVariable:5];
+    [self assert:5 equals:testClass.ivar1];
+}
+
+- (void)testAccessorGeneration
+{
+    [self assert:nil equals:[testClass ivar1]];
+    [testClass setIvar1:10];
+    [self assert:10 equals:[testClass ivar1]];
+    [self assert:10 equals:testClass.ivar1];
+
+    [self assert:nil equals:[testClass ivar2]];
+    testClass.ivar2 = 5;
+    [self assert:5 equals:[testClass ivar2]];
+    [self assert:5 equals:testClass.ivar2];
+    [self assertThrows:function()
+    {
+        [testClass setIvar2:6];
+    }];
+    [self assert:5 equals:[testClass ivar2]];
+
+    [self assert:nil equals:testClass.ivar3];
+    [self assertThrows:function()
+    {
+        [testClass ivar3];
+    }];
+    [self assertThrows:function()
+    {
+        [testClass setIvar3:20];
+    }];
+    [self assert:nil equals:testClass.ivar3];
+}
+
+@end
diff --git a/Tests/Objective-J/Preprocessor/BehaviorTests/MethodTest.j b/Tests/Objective-J/Preprocessor/BehaviorTests/MethodTest.j
new file mode 100644
index 000000000..e1e9a6df9
--- /dev/null
+++ b/Tests/Objective-J/Preprocessor/BehaviorTests/MethodTest.j
@@ -0,0 +1,65 @@
+@import <Foundation/Foundation.j>
+
+@implementation MathClass : CPObject
+{
+}
+
+- (CPNumber)five
+{
+    return 5;
+}
+
+- (CPNumber)sqrt:(CPNumber)operand
+{
+    return Math.sqrt(operand);
+}
+
+- (CPNumber)multiply:(CPNumber)firstOperand with:(CPNumber)secondOperand
+{
+    return firstOperand * secondOperand;
+}
+
+- (CPNumber)multiply:(CPNumber)operand, ...
+{
+    var product;
+
+    for (var i = 2, ii = arguments.length; i < ii; ++i)
+        product = product ? product * arguments[i] : arguments[i];
+
+    return product;
+}
+
+@end
+
+@implementation MethodTest : OJTestCase
+{
+    MathClass testClass;
+}
+
+- (void)setUp
+{
+    testClass = [[MathClass alloc] init];
+}
+
+- (void)testNoParameters
+{
+    [self assert:5 equals:[testClass five]];
+}
+
+- (void)testOneParameter
+{
+    [self assert:2 equals:[testClass sqrt:4]];
+}
+
+- (void)testTwoParameters
+{
+    [self assert:6 equals:[testClass multiply:2 with:3]];
+}
+
+- (void)testVarArgs
+{
+    [self assert:30 equals:[testClass multiply:2,3,5]];
+    [self assert:2310 equals:[testClass multiply:2,3,5,7,11]];
+}
+
+@end
diff --git a/Tests/Objective-J/Preprocessor/Class/root-class-multiple-ivars.j b/Tests/Objective-J/Preprocessor/OutputTests/Class/root-class-multiple-ivars.j
similarity index 100%
rename from Tests/Objective-J/Preprocessor/Class/root-class-multiple-ivars.j
rename to Tests/Objective-J/Preprocessor/OutputTests/Class/root-class-multiple-ivars.j
diff --git a/Tests/Objective-J/Preprocessor/Class/root-class-multiple-ivars.js b/Tests/Objective-J/Preprocessor/OutputTests/Class/root-class-multiple-ivars.js
similarity index 100%
rename from Tests/Objective-J/Preprocessor/Class/root-class-multiple-ivars.js
rename to Tests/Objective-J/Preprocessor/OutputTests/Class/root-class-multiple-ivars.js
diff --git a/Tests/Objective-J/Preprocessor/Class/root-class-one-ivar.j b/Tests/Objective-J/Preprocessor/OutputTests/Class/root-class-one-ivar.j
similarity index 100%
rename from Tests/Objective-J/Preprocessor/Class/root-class-one-ivar.j
rename to Tests/Objective-J/Preprocessor/OutputTests/Class/root-class-one-ivar.j
diff --git a/Tests/Objective-J/Preprocessor/Class/root-class-one-ivar.js b/Tests/Objective-J/Preprocessor/OutputTests/Class/root-class-one-ivar.js
similarity index 100%
rename from Tests/Objective-J/Preprocessor/Class/root-class-one-ivar.js
rename to Tests/Objective-J/Preprocessor/OutputTests/Class/root-class-one-ivar.js
diff --git a/Tests/Objective-J/Preprocessor/Class/root-class.j b/Tests/Objective-J/Preprocessor/OutputTests/Class/root-class.j
similarity index 100%
rename from Tests/Objective-J/Preprocessor/Class/root-class.j
rename to Tests/Objective-J/Preprocessor/OutputTests/Class/root-class.j
diff --git a/Tests/Objective-J/Preprocessor/Class/root-class.js b/Tests/Objective-J/Preprocessor/OutputTests/Class/root-class.js
similarity index 100%
rename from Tests/Objective-J/Preprocessor/Class/root-class.js
rename to Tests/Objective-J/Preprocessor/OutputTests/Class/root-class.js
diff --git a/Tests/Objective-J/Preprocessor/Messages/multiple-parameters.j b/Tests/Objective-J/Preprocessor/OutputTests/Messages/multiple-parameters.j
similarity index 100%
rename from Tests/Objective-J/Preprocessor/Messages/multiple-parameters.j
rename to Tests/Objective-J/Preprocessor/OutputTests/Messages/multiple-parameters.j
diff --git a/Tests/Objective-J/Preprocessor/Messages/multiple-parameters.js b/Tests/Objective-J/Preprocessor/OutputTests/Messages/multiple-parameters.js
similarity index 100%
rename from Tests/Objective-J/Preprocessor/Messages/multiple-parameters.js
rename to Tests/Objective-J/Preprocessor/OutputTests/Messages/multiple-parameters.js
diff --git a/Tests/Objective-J/Preprocessor/Messages/no-parameters.j b/Tests/Objective-J/Preprocessor/OutputTests/Messages/no-parameters.j
similarity index 100%
rename from Tests/Objective-J/Preprocessor/Messages/no-parameters.j
rename to Tests/Objective-J/Preprocessor/OutputTests/Messages/no-parameters.j
diff --git a/Tests/Objective-J/Preprocessor/Messages/no-parameters.js b/Tests/Objective-J/Preprocessor/OutputTests/Messages/no-parameters.js
similarity index 100%
rename from Tests/Objective-J/Preprocessor/Messages/no-parameters.js
rename to Tests/Objective-J/Preprocessor/OutputTests/Messages/no-parameters.js
diff --git a/Tests/Objective-J/Preprocessor/Messages/one-parameter.j b/Tests/Objective-J/Preprocessor/OutputTests/Messages/one-parameter.j
similarity index 100%
rename from Tests/Objective-J/Preprocessor/Messages/one-parameter.j
rename to Tests/Objective-J/Preprocessor/OutputTests/Messages/one-parameter.j
diff --git a/Tests/Objective-J/Preprocessor/Messages/one-parameter.js b/Tests/Objective-J/Preprocessor/OutputTests/Messages/one-parameter.js
similarity index 100%
rename from Tests/Objective-J/Preprocessor/Messages/one-parameter.js
rename to Tests/Objective-J/Preprocessor/OutputTests/Messages/one-parameter.js
diff --git a/Tests/Objective-J/Preprocessor/Messages/ternary-operator-argument.j b/Tests/Objective-J/Preprocessor/OutputTests/Messages/ternary-operator-argument.j
similarity index 100%
rename from Tests/Objective-J/Preprocessor/Messages/ternary-operator-argument.j
rename to Tests/Objective-J/Preprocessor/OutputTests/Messages/ternary-operator-argument.j
diff --git a/Tests/Objective-J/Preprocessor/Messages/ternary-operator-argument.js b/Tests/Objective-J/Preprocessor/OutputTests/Messages/ternary-operator-argument.js
similarity index 100%
rename from Tests/Objective-J/Preprocessor/Messages/ternary-operator-argument.js
rename to Tests/Objective-J/Preprocessor/OutputTests/Messages/ternary-operator-argument.js
diff --git a/Tests/Objective-J/Preprocessor/OutputTests/Misc/regex-simple-char-classes.j b/Tests/Objective-J/Preprocessor/OutputTests/Misc/regex-simple-char-classes.j
new file mode 100644
index 000000000..dbc548b70
--- /dev/null
+++ b/Tests/Objective-J/Preprocessor/OutputTests/Misc/regex-simple-char-classes.j
@@ -0,0 +1,10 @@
+/[\{]/;
+/[\}]/;
+/[@]/;
+/[\[]/;
+/[\]]/;
+/[#]/;
+/[\(]/;
+/[\)]/;
+/(\[)/;
+/(\])/;
diff --git a/Tests/Objective-J/Preprocessor/OutputTests/Misc/regex-simple-char-classes.js b/Tests/Objective-J/Preprocessor/OutputTests/Misc/regex-simple-char-classes.js
new file mode 100644
index 000000000..dbc548b70
--- /dev/null
+++ b/Tests/Objective-J/Preprocessor/OutputTests/Misc/regex-simple-char-classes.js
@@ -0,0 +1,10 @@
+/[\{]/;
+/[\}]/;
+/[@]/;
+/[\[]/;
+/[\]]/;
+/[#]/;
+/[\(]/;
+/[\)]/;
+/(\[)/;
+/(\])/;
diff --git a/Tests/Objective-J/Preprocessor/OutputTests/OutputTest.j b/Tests/Objective-J/Preprocessor/OutputTests/OutputTest.j
new file mode 100644
index 000000000..f9048e927
--- /dev/null
+++ b/Tests/Objective-J/Preprocessor/OutputTests/OutputTest.j
@@ -0,0 +1,55 @@
+
+var FILE = require("file"),
+    compressor = require("minify/shrinksafe");
+
+var FILENAMES = [
+        "Class/root-class",
+        "Class/root-class-one-ivar",
+        "Class/root-class-multiple-ivars",
+
+        "Messages/no-parameters",
+        "Messages/one-parameter",
+        "Messages/multiple-parameters",
+        "Messages/ternary-operator-argument",
+
+        "Misc/regex-simple-char-classes"
+                ];
+
+@implementation OutputTest : OJTestCase
+{
+}
+
++ (void)initialize
+{
+    var index = 0,
+        count = FILENAMES.length;
+
+    for (; index < count; ++index)
+    {
+        (function ()
+        {
+            var filename = FILENAMES[index],
+                testSelector = sel_getUid("test" + FILENAMES[index]);
+
+            class_addMethod(self, testSelector, function(self, _cmd)
+            {
+                var filePath = FILE.join(FILE.dirname(module.path), filename + ".j"),
+                    unpreprocessed = FILE.read(filePath, { charset:"UTF-8" }),
+                    preprocessed,
+                    correct = FILE.read(FILE.join(FILE.dirname(module.path), filename + ".js"));
+
+                [self assertNoThrow:function() {
+                    preprocessed = ObjectiveJ.preprocess(unpreprocessed).code(),
+                    preprocessed = compressor.compress(preprocessed, { charset : "UTF-8", useServer : true });
+                    correct = compressor.compress(correct, { charset : "UTF-8", useServer : true });
+                }];
+
+                [self assert:preprocessed equals:correct];
+            });
+        })();
+    }
+}
+
+@end
+
+[OutputTest alloc];
diff --git a/Tests/Objective-J/Preprocessor/PreprocessorTest.j b/Tests/Objective-J/Preprocessor/PreprocessorTest.j
deleted file mode 100644
index 946ec50c8..000000000
--- a/Tests/Objective-J/Preprocessor/PreprocessorTest.j
+++ /dev/null
@@ -1,47 +0,0 @@
-
-var FILE = require("file"),
-    compressor = require("minify/shrinksafe");
-
-var FILENAMES = [
-        "Class/root-class",
-        "Class/root-class-one-ivar",
-        "Class/root-class-multiple-ivars",
-
-        "Messages/no-parameter",
-        "Messages/one-parameter",
-        "Messages/multiple-parameters",
-        "Messages/ternary-operator-argument"
-                ];
-
-@implementation PreprocessorTest : OJTestCase
-{
-}
-
-+ (void)initialize
-{
-    var index = 0,
-        count = FILENAMES.length;
-
-    for (; index < count; ++index)
-    {
-        var filename = FILENAMES[index],
-            testSelector = sel_getUid("test" + FILENAMES[index])
-
-        class_addMethod(self, testSelector, function(self, _cmd)
-        {
-            var filePath = FILE.join(FILE.dirname(module.path), filename + ".j"),
-                unpreprocessed = FILE.read(filePath, { charset:"UTF-8" });
-                preprocessed = ObjectiveJ.preprocess(unpreprocessed).code(),
-                correct = FILE.read(FILE.join(FILE.dirname(module.path), filename + ".js"));
-
-            preprocessed = compressor.compress(preprocessed, { charset : "UTF-8", useServer : true });
-            correct = compressor.compress(correct, { charset : "UTF-8", useServer : true });
-
-            [self assert:preprocessed equals:correct];
-        });
-    }
-}
-
-@end
-
-[PreprocessorTest alloc];
\ No newline at end of file