diff --git a/tests/baselines/reference/classAbstractGeneric.errors.txt b/tests/baselines/reference/classAbstractGeneric.errors.txt
new file mode 100644
index 00000000000..fb5a4c32a39
--- /dev/null
+++ b/tests/baselines/reference/classAbstractGeneric.errors.txt
@@ -0,0 +1,46 @@
+tests/cases/conformance/classes/classDeclarations/classAbstractKeyword/classAbstractGeneric.ts(10,7): error TS2515: Non-abstract class 'C<T>' does not implement inherited abstract member 'bar' from class 'A<T>'.
+tests/cases/conformance/classes/classDeclarations/classAbstractKeyword/classAbstractGeneric.ts(10,7): error TS2515: Non-abstract class 'C<T>' does not implement inherited abstract member 'foo' from class 'A<T>'.
+tests/cases/conformance/classes/classDeclarations/classAbstractKeyword/classAbstractGeneric.ts(12,7): error TS2515: Non-abstract class 'D' does not implement inherited abstract member 'bar' from class 'A<number>'.
+tests/cases/conformance/classes/classDeclarations/classAbstractKeyword/classAbstractGeneric.ts(12,7): error TS2515: Non-abstract class 'D' does not implement inherited abstract member 'foo' from class 'A<number>'.
+tests/cases/conformance/classes/classDeclarations/classAbstractKeyword/classAbstractGeneric.ts(14,7): error TS2515: Non-abstract class 'E<T>' does not implement inherited abstract member 'bar' from class 'A<T>'.
+tests/cases/conformance/classes/classDeclarations/classAbstractKeyword/classAbstractGeneric.ts(18,7): error TS2515: Non-abstract class 'F<T>' does not implement inherited abstract member 'foo' from class 'A<T>'.
+
+
+==== tests/cases/conformance/classes/classDeclarations/classAbstractKeyword/classAbstractGeneric.ts (6 errors) ====
+    abstract class A<T> {
+        t: T;
+        
+        abstract foo(): T;
+        abstract bar(t: T);
+    }
+    
+    abstract class B<T> extends A<T> {}
+    
+    class C<T> extends A<T> {} // error -- inherits abstract methods
+          ~
+!!! error TS2515: Non-abstract class 'C<T>' does not implement inherited abstract member 'bar' from class 'A<T>'.
+          ~
+!!! error TS2515: Non-abstract class 'C<T>' does not implement inherited abstract member 'foo' from class 'A<T>'.
+    
+    class D extends A<number> {} // error -- inherits abstract methods
+          ~
+!!! error TS2515: Non-abstract class 'D' does not implement inherited abstract member 'bar' from class 'A<number>'.
+          ~
+!!! error TS2515: Non-abstract class 'D' does not implement inherited abstract member 'foo' from class 'A<number>'.
+    
+    class E<T> extends A<T> { // error -- doesn't implement bar
+          ~
+!!! error TS2515: Non-abstract class 'E<T>' does not implement inherited abstract member 'bar' from class 'A<T>'.
+        foo() { return this.t; }
+    }
+    
+    class F<T> extends A<T> { // error -- doesn't implement foo
+          ~
+!!! error TS2515: Non-abstract class 'F<T>' does not implement inherited abstract member 'foo' from class 'A<T>'.
+        bar(t : T) {}
+    }
+    
+    class G<T> extends A<T> {
+        foo() { return this.t; }
+        bar(t: T) { }
+    }
\ No newline at end of file
diff --git a/tests/baselines/reference/classAbstractGeneric.js b/tests/baselines/reference/classAbstractGeneric.js
new file mode 100644
index 00000000000..5af7da1601a
--- /dev/null
+++ b/tests/baselines/reference/classAbstractGeneric.js
@@ -0,0 +1,84 @@
+//// [classAbstractGeneric.ts]
+abstract class A<T> {
+    t: T;
+    
+    abstract foo(): T;
+    abstract bar(t: T);
+}
+
+abstract class B<T> extends A<T> {}
+
+class C<T> extends A<T> {} // error -- inherits abstract methods
+
+class D extends A<number> {} // error -- inherits abstract methods
+
+class E<T> extends A<T> { // error -- doesn't implement bar
+    foo() { return this.t; }
+}
+
+class F<T> extends A<T> { // error -- doesn't implement foo
+    bar(t : T) {}
+}
+
+class G<T> extends A<T> {
+    foo() { return this.t; }
+    bar(t: T) { }
+}
+
+//// [classAbstractGeneric.js]
+var __extends = (this && this.__extends) || function (d, b) {
+    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
+    function __() { this.constructor = d; }
+    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+};
+var A = (function () {
+    function A() {
+    }
+    return A;
+})();
+var B = (function (_super) {
+    __extends(B, _super);
+    function B() {
+        _super.apply(this, arguments);
+    }
+    return B;
+})(A);
+var C = (function (_super) {
+    __extends(C, _super);
+    function C() {
+        _super.apply(this, arguments);
+    }
+    return C;
+})(A); // error -- inherits abstract methods
+var D = (function (_super) {
+    __extends(D, _super);
+    function D() {
+        _super.apply(this, arguments);
+    }
+    return D;
+})(A); // error -- inherits abstract methods
+var E = (function (_super) {
+    __extends(E, _super);
+    function E() {
+        _super.apply(this, arguments);
+    }
+    E.prototype.foo = function () { return this.t; };
+    return E;
+})(A);
+var F = (function (_super) {
+    __extends(F, _super);
+    function F() {
+        _super.apply(this, arguments);
+    }
+    F.prototype.bar = function (t) { };
+    return F;
+})(A);
+var G = (function (_super) {
+    __extends(G, _super);
+    function G() {
+        _super.apply(this, arguments);
+    }
+    G.prototype.foo = function () { return this.t; };
+    G.prototype.bar = function (t) { };
+    return G;
+})(A);
diff --git a/tests/baselines/reference/classAbstractMergedDeclaration.errors.txt b/tests/baselines/reference/classAbstractMergedDeclaration.errors.txt
new file mode 100644
index 00000000000..ca2cc3b8c2d
--- /dev/null
+++ b/tests/baselines/reference/classAbstractMergedDeclaration.errors.txt
@@ -0,0 +1,66 @@
+tests/cases/conformance/classes/classDeclarations/classAbstractKeyword/classAbstractMergedDeclaration.ts(7,16): error TS2300: Duplicate identifier 'CI'.
+tests/cases/conformance/classes/classDeclarations/classAbstractKeyword/classAbstractMergedDeclaration.ts(8,11): error TS2300: Duplicate identifier 'CI'.
+tests/cases/conformance/classes/classDeclarations/classAbstractKeyword/classAbstractMergedDeclaration.ts(10,11): error TS2300: Duplicate identifier 'IC'.
+tests/cases/conformance/classes/classDeclarations/classAbstractKeyword/classAbstractMergedDeclaration.ts(11,16): error TS2300: Duplicate identifier 'IC'.
+tests/cases/conformance/classes/classDeclarations/classAbstractKeyword/classAbstractMergedDeclaration.ts(13,16): error TS2300: Duplicate identifier 'CC1'.
+tests/cases/conformance/classes/classDeclarations/classAbstractKeyword/classAbstractMergedDeclaration.ts(14,7): error TS2300: Duplicate identifier 'CC1'.
+tests/cases/conformance/classes/classDeclarations/classAbstractKeyword/classAbstractMergedDeclaration.ts(16,7): error TS2300: Duplicate identifier 'CC2'.
+tests/cases/conformance/classes/classDeclarations/classAbstractKeyword/classAbstractMergedDeclaration.ts(17,16): error TS2300: Duplicate identifier 'CC2'.
+tests/cases/conformance/classes/classDeclarations/classAbstractKeyword/classAbstractMergedDeclaration.ts(19,1): error TS2511: Cannot create an instance of the abstract class 'CM'.
+tests/cases/conformance/classes/classDeclarations/classAbstractKeyword/classAbstractMergedDeclaration.ts(20,1): error TS2511: Cannot create an instance of the abstract class 'MC'.
+tests/cases/conformance/classes/classDeclarations/classAbstractKeyword/classAbstractMergedDeclaration.ts(21,1): error TS2511: Cannot create an instance of the abstract class 'CI'.
+tests/cases/conformance/classes/classDeclarations/classAbstractKeyword/classAbstractMergedDeclaration.ts(22,5): error TS2304: Cannot find name 'IC'.
+tests/cases/conformance/classes/classDeclarations/classAbstractKeyword/classAbstractMergedDeclaration.ts(23,1): error TS2511: Cannot create an instance of the abstract class 'CC1'.
+
+
+==== tests/cases/conformance/classes/classDeclarations/classAbstractKeyword/classAbstractMergedDeclaration.ts (13 errors) ====
+    abstract class CM {}
+    module CM {}
+    
+    module MC {}
+    abstract class MC {}
+    
+    abstract class CI {}
+                   ~~
+!!! error TS2300: Duplicate identifier 'CI'.
+    interface CI {}
+              ~~
+!!! error TS2300: Duplicate identifier 'CI'.
+    
+    interface IC {}
+              ~~
+!!! error TS2300: Duplicate identifier 'IC'.
+    abstract class IC {}
+                   ~~
+!!! error TS2300: Duplicate identifier 'IC'.
+    
+    abstract class CC1 {}
+                   ~~~
+!!! error TS2300: Duplicate identifier 'CC1'.
+    class CC1 {}
+          ~~~
+!!! error TS2300: Duplicate identifier 'CC1'.
+    
+    class CC2 {}
+          ~~~
+!!! error TS2300: Duplicate identifier 'CC2'.
+    abstract class CC2 {}
+                   ~~~
+!!! error TS2300: Duplicate identifier 'CC2'.
+    
+    new CM;
+    ~~~~~~
+!!! error TS2511: Cannot create an instance of the abstract class 'CM'.
+    new MC;
+    ~~~~~~
+!!! error TS2511: Cannot create an instance of the abstract class 'MC'.
+    new CI;
+    ~~~~~~
+!!! error TS2511: Cannot create an instance of the abstract class 'CI'.
+    new IC;
+        ~~
+!!! error TS2304: Cannot find name 'IC'.
+    new CC1;
+    ~~~~~~~
+!!! error TS2511: Cannot create an instance of the abstract class 'CC1'.
+    new CC2;
\ No newline at end of file
diff --git a/tests/baselines/reference/classAbstractMergedDeclaration.js b/tests/baselines/reference/classAbstractMergedDeclaration.js
new file mode 100644
index 00000000000..1b4d6fea342
--- /dev/null
+++ b/tests/baselines/reference/classAbstractMergedDeclaration.js
@@ -0,0 +1,73 @@
+//// [classAbstractMergedDeclaration.ts]
+abstract class CM {}
+module CM {}
+
+module MC {}
+abstract class MC {}
+
+abstract class CI {}
+interface CI {}
+
+interface IC {}
+abstract class IC {}
+
+abstract class CC1 {}
+class CC1 {}
+
+class CC2 {}
+abstract class CC2 {}
+
+new CM;
+new MC;
+new CI;
+new IC;
+new CC1;
+new CC2;
+
+//// [classAbstractMergedDeclaration.js]
+var CM = (function () {
+    function CM() {
+    }
+    return CM;
+})();
+var MC = (function () {
+    function MC() {
+    }
+    return MC;
+})();
+var CI = (function () {
+    function CI() {
+    }
+    return CI;
+})();
+var IC = (function () {
+    function IC() {
+    }
+    return IC;
+})();
+var CC1 = (function () {
+    function CC1() {
+    }
+    return CC1;
+})();
+var CC1 = (function () {
+    function CC1() {
+    }
+    return CC1;
+})();
+var CC2 = (function () {
+    function CC2() {
+    }
+    return CC2;
+})();
+var CC2 = (function () {
+    function CC2() {
+    }
+    return CC2;
+})();
+new CM;
+new MC;
+new CI;
+new IC;
+new CC1;
+new CC2;