diff --git a/.gitignore b/.gitignore
index 98a3ba835b..3166d113d2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,3 +9,4 @@ raw/
 .idea
 cli/index.generated.js
 src/diagnosticMessages.generated.ts
+coverage/
diff --git a/tests/parser/arrow-functions.ts b/tests/parser/arrow-functions.ts
index 8c842f65c2..6ef3e37592 100644
--- a/tests/parser/arrow-functions.ts
+++ b/tests/parser/arrow-functions.ts
@@ -9,3 +9,7 @@ x => x;
 // not an array function
 (b ? x : y);
 (b ? f : g)();
+
+(b ? x | y);
+// ERROR 1005: "')' expected."
+(x: i32 => x;
diff --git a/tests/parser/arrow-functions.ts.fixture.ts b/tests/parser/arrow-functions.ts.fixture.ts
index 3f049b2a6a..00cd257092 100644
--- a/tests/parser/arrow-functions.ts.fixture.ts
+++ b/tests/parser/arrow-functions.ts.fixture.ts
@@ -6,3 +6,4 @@
 x => x;
 (b ? x : y);
 (b ? f : g)();
+// ERROR 1005: "':' expected." in arrow-functions.ts(13,10+1)
diff --git a/tests/parser/call-function-return.ts b/tests/parser/call-function-return.ts
index c83e13788b..5172fa3783 100644
--- a/tests/parser/call-function-return.ts
+++ b/tests/parser/call-function-return.ts
@@ -1 +1,5 @@
 a = fn()(1, 2);
+// ERROR 1042: "'declare' modifier cannot be used here."
+declare b = fn()(1, 2);
+// ERROR 1005: "')' expected."
+a = fn()(1, 2;
diff --git a/tests/parser/call-function-return.ts.fixture.ts b/tests/parser/call-function-return.ts.fixture.ts
index c83e13788b..3130ccd669 100644
--- a/tests/parser/call-function-return.ts.fixture.ts
+++ b/tests/parser/call-function-return.ts.fixture.ts
@@ -1 +1,5 @@
 a = fn()(1, 2);
+b = fn()(1, 2);
+a = fn();
+// ERROR 1042: "'declare' modifier cannot be used here." in call-function-return.ts(3,1+7)
+// ERROR 1005: "')' expected." in call-function-return.ts(5,13+1)
diff --git a/tests/parser/calls.ts b/tests/parser/calls.ts
index 2e9b0d9374..76b58aecf7 100644
--- a/tests/parser/calls.ts
+++ b/tests/parser/calls.ts
@@ -14,3 +14,5 @@ obj.a(1);
 
 // Everything
 id(a)[0](b)(c).a(d)(e)[1](f)(g);
+// ERROR 1003: "Identifier expected."
+obj.(b ? f : g)();
diff --git a/tests/parser/calls.ts.fixture.ts b/tests/parser/calls.ts.fixture.ts
index 81e0e3d2c9..f366b910d4 100644
--- a/tests/parser/calls.ts.fixture.ts
+++ b/tests/parser/calls.ts.fixture.ts
@@ -5,3 +5,4 @@ arr[0](1);
 obj.a();
 obj.a(1);
 id(a)[0](b)(c).a(d)(e)[1](f)(g);
+// ERROR 1003: "Identifier expected." in calls.ts(18,5+13)
diff --git a/tests/parser/class-expression.ts b/tests/parser/class-expression.ts
index 2c1824ab5f..41a8b932b5 100644
--- a/tests/parser/class-expression.ts
+++ b/tests/parser/class-expression.ts
@@ -3,3 +3,9 @@ var a = class {
   bar: i32;
 };
 var b = class Foo {};
+// ERROR 1005: "'{' expected."
+var c = class [bar: i32];
+// ERROR 1003: "Identifier expected."
+// ERROR 1005: "'}' expected."
+var d = class bat {
+  
diff --git a/tests/parser/class-expression.ts.fixture.ts b/tests/parser/class-expression.ts.fixture.ts
index 2c1824ab5f..11d359bb5d 100644
--- a/tests/parser/class-expression.ts.fixture.ts
+++ b/tests/parser/class-expression.ts.fixture.ts
@@ -3,3 +3,6 @@ var a = class {
   bar: i32;
 };
 var b = class Foo {};
+// ERROR 1005: "'{' expected." in class-expression.ts(7,14+0)
+// ERROR 1003: "Identifier expected." in class-expression.ts(10,19+1)
+// ERROR 1005: "'}' expected." in class-expression.ts(11,3+1)
diff --git a/tests/parser/class.ts b/tests/parser/class.ts
index b55a2880e6..648250b2be 100644
--- a/tests/parser/class.ts
+++ b/tests/parser/class.ts
@@ -37,4 +37,26 @@ export class Invalid<T> {
   // 1031: 'declare' modifier cannot appear on class elements of this kind.
   // 1183: An implementation cannot be declared in ambient contexts.
   declare declareMethod(): i32 {}
+
+  // ERROR 1042: "'readonly' modifier cannot be used here."
+  readonly get name():i32 {}
+  // ERROR 1049: "A 'set' accessor must have exactly one parameter."
+  // ERROR 1042: "'readonly' modifier cannot be used here."
+  // ERROR 1095: "A 'set' accessor cannot have a return type annotation."
+  readonly set name():i32 {}
+
+  // ERROR 1042: "'static' modifier cannot be used here."
+  static constructor(a: i32) {}
+
+  // ERROR 1042: "'abstract' modifier cannot be used here."
+  abstract constructor(a: i32) {}
+
+  // ERROR 1042: "'readonly' modifier cannot be used here."
+  readonly constructor(a: i32) {}
 }
+
+
+export abstract class Invalid<T> { 
+  // ERROR 1245: "Method 'constructor' cannot have an implementation because it is marked abstract."
+  abstract constructor(a: i32) {}
+}
\ No newline at end of file
diff --git a/tests/parser/class.ts.fixture.ts b/tests/parser/class.ts.fixture.ts
index 9d25f7a31d..b1fe154834 100644
--- a/tests/parser/class.ts.fixture.ts
+++ b/tests/parser/class.ts.fixture.ts
@@ -17,6 +17,14 @@ export class Invalid<T> {
   declare declareField: i32;
   declare declareInitializer: i32 = 0;
   declare declareMethod(): i32 {}
+  readonly get name(): i32 {}
+  readonly set name() {}
+  static constructor(a: i32) {}
+  constructor(a: i32) {}
+  readonly constructor(a: i32) {}
+}
+export abstract class Invalid<T> {
+  abstract constructor(a: i32) {}
 }
 // ERROR 1092: "Type parameters cannot appear on a constructor declaration." in class.ts(15,14+3)
 // ERROR 1110: "Type expected." in class.ts(18,21+0)
@@ -31,3 +39,12 @@ export class Invalid<T> {
 // ERROR 1039: "Initializers are not allowed in ambient contexts." in class.ts(35,35+1)
 // ERROR 1031: "'declare' modifier cannot appear on class elements of this kind." in class.ts(39,3+7)
 // ERROR 1183: "An implementation cannot be declared in ambient contexts." in class.ts(39,32+1)
+// ERROR 1042: "'readonly' modifier cannot be used here." in class.ts(42,3+8)
+// ERROR 1042: "'readonly' modifier cannot be used here." in class.ts(46,3+8)
+// ERROR 1049: "A 'set' accessor must have exactly one parameter." in class.ts(46,16+4)
+// ERROR 1095: "A 'set' accessor cannot have a return type annotation." in class.ts(46,22+1)
+// ERROR 1042: "'static' modifier cannot be used here." in class.ts(49,3+6)
+// ERROR 1042: "'abstract' modifier cannot be used here." in class.ts(52,3+8)
+// ERROR 1042: "'readonly' modifier cannot be used here." in class.ts(55,3+8)
+// ERROR 1042: "'abstract' modifier cannot be used here." in class.ts(61,3+8)
+// ERROR 1245: "Method 'constructor' cannot have an implementation because it is marked abstract." in class.ts(61,32+1)
diff --git a/tests/parser/constructor.ts b/tests/parser/constructor.ts
index 454260eae2..ccc3b6346d 100644
--- a/tests/parser/constructor.ts
+++ b/tests/parser/constructor.ts
@@ -2,6 +2,9 @@ class MyClass {
   constructor() {}
   constructor(a: i32) {}
   constructor(a: i32, b: i32) {}
+  constructor(a: i32, b: i32, protected c:f32) {}
+  //ERROR 1317: "A parameter property cannot be declared using a rest parameter."
+  constructor(a: i32, b: i32, protected c:f32, protected ...d:i32[]) {}
 }
 
 class MyClassImplicit {
diff --git a/tests/parser/constructor.ts.fixture.ts b/tests/parser/constructor.ts.fixture.ts
index 481863215c..752763afa8 100644
--- a/tests/parser/constructor.ts.fixture.ts
+++ b/tests/parser/constructor.ts.fixture.ts
@@ -2,7 +2,10 @@ class MyClass {
   constructor() {}
   constructor(a: i32) {}
   constructor(a: i32, b: i32) {}
+  constructor(a: i32, b: i32, protected c: f32) {}
+  constructor(a: i32, b: i32, protected c: f32, protected ...d: Array<i32>) {}
 }
 class MyClassImplicit {
   constructor(public a: i32, private readonly b: i32 = 2, c: i32 = 3) {}
 }
+// ERROR 1317: "A parameter property cannot be declared using a rest parameter." in constructor.ts(7,58+3)
diff --git a/tests/parser/decorators.ts b/tests/parser/decorators.ts
index 5cb19ded08..5e40465eb7 100644
--- a/tests/parser/decorators.ts
+++ b/tests/parser/decorators.ts
@@ -9,3 +9,4 @@
 @external("a", "b")
 @custom
 function a(): void {}
+@operator. // ERROR 1126: "Unexpected end of text."
diff --git a/tests/parser/decorators.ts.fixture.ts b/tests/parser/decorators.ts.fixture.ts
index 5cb19ded08..e9aac1b9df 100644
--- a/tests/parser/decorators.ts.fixture.ts
+++ b/tests/parser/decorators.ts.fixture.ts
@@ -9,3 +9,5 @@
 @external("a", "b")
 @custom
 function a(): void {}
+// ERROR 1003: "Identifier expected." in decorators.ts(12,10+1)
+// ERROR 1126: "Unexpected end of text." in decorators.ts(12,12+0)
diff --git a/tests/parser/do.ts b/tests/parser/do.ts
index b5c27f3459..130b4aa27b 100644
--- a/tests/parser/do.ts
+++ b/tests/parser/do.ts
@@ -3,3 +3,5 @@ do {
 } while (a != b);
 do b;
 while (a);
+// ERROR 1005: "'(' expected."
+do{} while;
diff --git a/tests/parser/do.ts.fixture.ts b/tests/parser/do.ts.fixture.ts
index b5c27f3459..7e3a3d6f60 100644
--- a/tests/parser/do.ts.fixture.ts
+++ b/tests/parser/do.ts.fixture.ts
@@ -3,3 +3,4 @@ do {
 } while (a != b);
 do b;
 while (a);
+// ERROR 1005: "'(' expected." in do.ts(7,6+5)
diff --git a/tests/parser/export-default.ts b/tests/parser/export-default.ts
index 5c00aae7af..c102a1586c 100644
--- a/tests/parser/export-default.ts
+++ b/tests/parser/export-default.ts
@@ -4,3 +4,11 @@ export default class TheClass {}
 export default enum TheEnum {}
 export default namespace theNamespace {}
 export default something;
+// ERROR 1109: "Expression expected."
+export import A = B? ;
+
+export import A = :B? ;
+// ERROR 1005: "'=' expected."
+export import A (= B)? ;
+// ERROR 1003: "Identifier expected."
+export import: A (= B)? ;
diff --git a/tests/parser/export-default.ts.fixture.ts b/tests/parser/export-default.ts.fixture.ts
index d2832910ba..30d391353a 100644
--- a/tests/parser/export-default.ts.fixture.ts
+++ b/tests/parser/export-default.ts.fixture.ts
@@ -5,3 +5,7 @@ export default namespace theNamespace {}
 export {
   something as default
 };
+export import A = B;
+// ERROR 1109: "Expression expected." in export-default.ts(8,20+1)
+// ERROR 1005: "'=' expected." in export-default.ts(12,15+1)
+// ERROR 1003: "Identifier expected." in export-default.ts(14,8+6)
diff --git a/tests/parser/for.ts b/tests/parser/for.ts
index 3e10da956f..2f48855b57 100644
--- a/tests/parser/for.ts
+++ b/tests/parser/for.ts
@@ -7,3 +7,7 @@ for (i = 0; i < 10; ++i) {
 for (;;) {
   ;
 }
+// ERROR 1155: "'const' declarations must be initialized."
+for (const i; i < 10; i++) {
+
+}
diff --git a/tests/parser/for.ts.fixture.ts b/tests/parser/for.ts.fixture.ts
index 3e10da956f..8b4aea03fb 100644
--- a/tests/parser/for.ts.fixture.ts
+++ b/tests/parser/for.ts.fixture.ts
@@ -7,3 +7,5 @@ for (i = 0; i < 10; ++i) {
 for (;;) {
   ;
 }
+for (const i; i < 10; i++) {}
+// ERROR 1155: "'const' declarations must be initialized." in for.ts(11,12+1)
diff --git a/tests/parser/forof.ts b/tests/parser/forof.ts
index 3cab01d38c..512797a190 100644
--- a/tests/parser/forof.ts
+++ b/tests/parser/forof.ts
@@ -14,3 +14,5 @@ for (foo of bar) ;
 for (var foo of bar) ;
 for (let foo of bar) ;
 for (const foo of bar) ;
+// ERROR 1155: "'const' declarations must be initialized."
+for (const foo from bar) ;
diff --git a/tests/parser/forof.ts.fixture.ts b/tests/parser/forof.ts.fixture.ts
index 3cab01d38c..b2be725c62 100644
--- a/tests/parser/forof.ts.fixture.ts
+++ b/tests/parser/forof.ts.fixture.ts
@@ -14,3 +14,5 @@ for (foo of bar) ;
 for (var foo of bar) ;
 for (let foo of bar) ;
 for (const foo of bar) ;
+// ERROR 1155: "'const' declarations must be initialized." in forof.ts(18,12+3)
+// ERROR 1005: "';' expected." in forof.ts(18,12+3)
diff --git a/tests/parser/function-expression.ts b/tests/parser/function-expression.ts
index bbd37e9918..1ac322098f 100644
--- a/tests/parser/function-expression.ts
+++ b/tests/parser/function-expression.ts
@@ -14,3 +14,7 @@ var e = (a: i32, b: i32): i32 => {
   ;
 };
 var f = (a: i32): i32 => a;
+// ERROR 1005: "'(' expected."
+var g = function:void{
+  ;
+};
diff --git a/tests/parser/function-expression.ts.fixture.ts b/tests/parser/function-expression.ts.fixture.ts
index bbd37e9918..cf3b1b60b5 100644
--- a/tests/parser/function-expression.ts.fixture.ts
+++ b/tests/parser/function-expression.ts.fixture.ts
@@ -14,3 +14,4 @@ var e = (a: i32, b: i32): i32 => {
   ;
 };
 var f = (a: i32): i32 => a;
+// ERROR 1005: "'(' expected." in function-expression.ts(18,17+0)
diff --git a/tests/parser/function.ts b/tests/parser/function.ts
index c1e254db36..bd8473c7ea 100644
--- a/tests/parser/function.ts
+++ b/tests/parser/function.ts
@@ -4,3 +4,103 @@ function typeparams<T, V extends T>(a: V | null = null): void {}
 function withdecorator(): void {}
 function withthis(this: i32): i32 { return this; }
 function withthisp(this: i32, a: f32, b: f64): i32 { return this; }
+
+// 1003: Identifier expected.
+function typevoid<T extends () => void>():void{}
+
+// 1003: Identifier expected.
+function extendsfunctiontype(this: ()=>void):void {}
+
+// 1005: ':' expected.
+function extendsinsteadofcolon(this extends i32):void {}
+
+// 1003: Identifier expected.
+function typeNone<void>():void{}
+
+// 1005: ')' expected.
+function functionforgetcomma(this: ()=>void a: i32):void {}
+
+function trycatchFunction(): void {
+  try {
+  }
+  catch (exception_var) {
+  }
+  finally {
+  }
+}
+// ERROR 1003: "Identifier expected."
+function deeperFunction<void>():void{{++a;}}
+// ERROR 1003: "Identifier expected."
+function identifierFunction<void>():void{var a = 0;}
+// ERROR 1003: "Identifier expected."
+function stringFunction<void>():void{"string"}
+// ERROR 1005: "'(' expected."
+function backtick Function<void>():void{`${a}bc`}
+// ERROR 1003: "Identifier expected."
+// ERROR 1351: "An identifier or keyword cannot immediately follow a numeric literal."
+function deeperFunction<void>():void{1.23f}
+
+function errorTrycatchFunction(): void {
+  // ERROR 1005: "'(' expected."
+  try {
+  }
+  catch  {
+  }
+  finally {
+  }
+  // ERROR 1003: "Identifier expected."
+  try {
+  }
+  catch (var) {
+  }
+  finally {
+  }
+  // ERROR 1005: "'{' expected."
+  try {
+  }
+  catch (exception_var) 
+  finally {
+  }
+  // ERROR 1005: "'(' expected."
+  try {
+  } catch
+  // ERROR 1005: "'{' expected."
+  try {
+  }
+  catch (exception_var) {}
+  finally()
+  // ERROR 1005: "'{' expected."
+  try(a())
+  // ERROR 1005: "'catch' expected."
+  try{a()}
+}
+
+function switchError(i: i32): void{
+
+  switch(i) { 
+    case constant-expression1: { 
+       break; 
+    } 
+    default: { 
+       break; 
+    } 
+  } 
+  // ERROR 1005: "'(' expected."
+  switch {i} {
+
+  }
+  // ERROR 1005: "'{' expected."
+  switch (i) []
+
+}
+
+function ifError(i: i32): void{
+  // ERROR 1005: "'(' expected."
+  if {i}
+
+}
+
+function doError(i: i32): void{
+  // ERROR 1005: "'while' expected."
+  do {}
+}
\ No newline at end of file
diff --git a/tests/parser/function.ts.fixture.ts b/tests/parser/function.ts.fixture.ts
index be705e4334..f8519d78a6 100644
--- a/tests/parser/function.ts.fixture.ts
+++ b/tests/parser/function.ts.fixture.ts
@@ -8,3 +8,58 @@ function withthis(this: i32): i32 {
 function withthisp(this: i32, a: f32, b: f64): i32 {
   return this;
 }
+function extendsfunctiontype(): void {}
+function trycatchFunction(): void {
+  try {
+  } catch (exception_var) {
+  } finally {
+  }
+  }
+function errorTrycatchFunction(): void {}
+function switchError(i: i32): void {
+    switch (i) {
+      case constant - expression1:
+        {
+          break;
+        }
+
+      default:
+        {
+          break;
+        }
+
+}
+  }
+function ifError(i: i32): void {}
+function doError(i: i32): void {}
+// ERROR 1003: "Identifier expected." in function.ts(9,29+10)
+// ERROR 1003: "Identifier expected." in function.ts(12,36+8)
+// ERROR 1005: "':' expected." in function.ts(15,32+4)
+// ERROR 1003: "Identifier expected." in function.ts(18,19+4)
+// ERROR 1003: "Identifier expected." in function.ts(21,36+8)
+// ERROR 1005: "')' expected." in function.ts(21,40+4)
+// ERROR 1003: "Identifier expected." in function.ts(32,25+4)
+// ERROR 1003: "Identifier expected." in function.ts(34,29+4)
+// ERROR 1003: "Identifier expected." in function.ts(36,25+4)
+// ERROR 1005: "'(' expected." in function.ts(38,18+0)
+// ERROR 1003: "Identifier expected." in function.ts(41,25+4)
+// ERROR 1351: "An identifier or keyword cannot immediately follow a numeric literal." in function.ts(41,42+0)
+// ERROR 1005: "'(' expected." in function.ts(47,3+5)
+// ERROR 1109: "Expression expected." in function.ts(47,3+5)
+// ERROR 1109: "Expression expected." in function.ts(49,3+7)
+// ERROR 1003: "Identifier expected." in function.ts(54,9+1)
+// ERROR 1109: "Expression expected." in function.ts(54,3+5)
+// ERROR 1109: "Expression expected." in function.ts(56,3+7)
+// ERROR 1005: "'{' expected." in function.ts(61,23+1)
+// ERROR 1109: "Expression expected." in function.ts(61,3+5)
+// ERROR 1109: "Expression expected." in function.ts(62,3+7)
+// ERROR 1005: "'(' expected." in function.ts(66,5+5)
+// ERROR 1005: "'{' expected." in function.ts(71,3+7)
+// ERROR 1109: "Expression expected." in function.ts(70,3+5)
+// ERROR 1109: "Expression expected." in function.ts(71,3+7)
+// ERROR 1005: "'{' expected." in function.ts(73,3+3)
+// ERROR 1005: "'catch' expected." in function.ts(75,10+1)
+// ERROR 1005: "'(' expected." in function.ts(89,3+6)
+// ERROR 1005: "'{' expected." in function.ts(93,12+1)
+// ERROR 1005: "'(' expected." in function.ts(99,3+2)
+// ERROR 1005: "'while' expected." in function.ts(105,7+1)
diff --git a/tests/parser/import.ts b/tests/parser/import.ts
index f78be31a7c..27bd788071 100644
--- a/tests/parser/import.ts
+++ b/tests/parser/import.ts
@@ -14,3 +14,17 @@ import {
 } from "./other";
 import * as A from "./other";
 import "./other";
+// ERROR 1005: "'}' expected."
+import {A from "./other";
+// ERROR 1003: "Identifier expected."
+import * as =A from "./other";
+// ERROR 1005: "'as' expected."
+import * A from "./other";
+
+import A from "./other"
+// ERROR 100: "Not implemented: Mixed default and named imports"
+import A, B from "./other"
+
+import {A} from B;
+
+import {A} by "./other";
diff --git a/tests/parser/import.ts.fixture.ts b/tests/parser/import.ts.fixture.ts
index f78be31a7c..065454d9f7 100644
--- a/tests/parser/import.ts.fixture.ts
+++ b/tests/parser/import.ts.fixture.ts
@@ -14,3 +14,12 @@ import {
 } from "./other";
 import * as A from "./other";
 import "./other";
+import {
+  default as A
+} from "./other";
+// ERROR 1005: "'}' expected." in import.ts(18,9+1)
+// ERROR 1003: "Identifier expected." in import.ts(20,10+2)
+// ERROR 1005: "'as' expected." in import.ts(22,8+1)
+// ERROR 100: "Not implemented: Mixed default and named imports" in import.ts(26,9+1)
+// ERROR 1141: "String literal expected." in import.ts(28,12+4)
+// ERROR 1005: "'from' expected." in import.ts(30,10+1)
diff --git a/tests/parser/index-declaration.ts b/tests/parser/index-declaration.ts
index e9374e8e20..9bf864aac0 100644
--- a/tests/parser/index-declaration.ts
+++ b/tests/parser/index-declaration.ts
@@ -1,3 +1,64 @@
 class A {
   [key: i32]: f64;
 }
+// ERROR 1206: "Decorators are not valid here."
+class B {
+  @final [key: i32]: f64;
+}
+// ERROR 1005: "':' expected."
+class C {
+  [key extends i32]: f64;
+}
+// ERROR 1110: "Type expected."
+class D {
+  [key: ()=>void]: f64;
+}
+// ERROR 1110: "Type expected."
+class E {
+  [key: ()=>void: f64;
+}
+// ERROR 1003: "Identifier expected."
+class F {
+  [key: i32]: ()=>void;
+}
+// ERROR 1005: "':' expected."
+class G {
+  [key: i32]| f64;
+}
+// ERROR 1005: "'key' expected."
+class H {
+  [keys: i32]: f64;
+}
+// ERROR 1003: "Identifier expected."
+class I {
+  [()=>string: i32]: f64;
+}
+
+// ERROR 1042: "'public' modifier cannot be used here."
+class J {
+  public [()=>string: i32]: f64;
+}
+// ERROR 1042: "'protected' modifier cannot be used here."
+class K {
+  protected [()=>string: i32]: f64;
+}
+// ERROR 1042: "'private' modifier cannot be used here."
+class L {
+  private [()=>string: i32]: f64;
+}
+// ERROR 1042: "'static' modifier cannot be used here."
+class M {
+  static [()=>string: i32]: f64;
+}
+// ERROR 1042: "'abstract' modifier cannot be used here."
+class N {
+  abstract [()=>string: i32]: f64;
+}
+// ERROR 1042: "'readonly' modifier cannot be used here."
+class O {
+  readonly [()=>string: i32]: f64;
+}
+// ERROR 1005: "']' expected."
+class P {
+  [key: i32 : f64;
+}
diff --git a/tests/parser/index-declaration.ts.fixture.ts b/tests/parser/index-declaration.ts.fixture.ts
index e9374e8e20..9d6abd11a7 100644
--- a/tests/parser/index-declaration.ts.fixture.ts
+++ b/tests/parser/index-declaration.ts.fixture.ts
@@ -1,3 +1,41 @@
 class A {
   [key: i32]: f64;
 }
+class B {
+  [key: i32]: f64;
+}
+class C {}
+class D {}
+class E {}
+class F {}
+class G {}
+class H {}
+class I {}
+class J {}
+class K {}
+class L {}
+class M {}
+class N {}
+class O {}
+class P {}
+// ERROR 1206: "Decorators are not valid here." in index-declaration.ts(6,3+6)
+// ERROR 1005: "':' expected." in index-declaration.ts(10,4+3)
+// ERROR 1110: "Type expected." in index-declaration.ts(14,13+4)
+// ERROR 1110: "Type expected." in index-declaration.ts(18,13+4)
+// ERROR 1003: "Identifier expected." in index-declaration.ts(22,15+8)
+// ERROR 1005: "':' expected." in index-declaration.ts(26,12+1)
+// ERROR 1005: "'key' expected." in index-declaration.ts(30,4+4)
+// ERROR 1003: "Identifier expected." in index-declaration.ts(34,3+1)
+// ERROR 1042: "'public' modifier cannot be used here." in index-declaration.ts(39,3+6)
+// ERROR 1003: "Identifier expected." in index-declaration.ts(39,10+1)
+// ERROR 1042: "'protected' modifier cannot be used here." in index-declaration.ts(43,3+9)
+// ERROR 1003: "Identifier expected." in index-declaration.ts(43,13+1)
+// ERROR 1042: "'protected' modifier cannot be used here." in index-declaration.ts(47,3+7)
+// ERROR 1003: "Identifier expected." in index-declaration.ts(47,11+1)
+// ERROR 1042: "'static' modifier cannot be used here." in index-declaration.ts(51,3+6)
+// ERROR 1003: "Identifier expected." in index-declaration.ts(51,10+1)
+// ERROR 1042: "'abstract' modifier cannot be used here." in index-declaration.ts(55,3+8)
+// ERROR 1003: "Identifier expected." in index-declaration.ts(55,12+1)
+// ERROR 1003: "Identifier expected." in index-declaration.ts(59,12+1)
+// ERROR 1042: "'readonly' modifier cannot be used here." in index-declaration.ts(59,3+8)
+// ERROR 1005: "']' expected." in index-declaration.ts(63,9+3)
diff --git a/tests/parser/interface.ts b/tests/parser/interface.ts
index db94e6119e..e1bdd33801 100644
--- a/tests/parser/interface.ts
+++ b/tests/parser/interface.ts
@@ -9,3 +9,9 @@ interface Boo {
   baz: i32,
   readonly baz2: f64,
 }
+
+interface Invalid {
+  // ERROR 1206: "Decorators are not valid here."
+  @final baz: i32;
+  declare baz2: f64;
+}
diff --git a/tests/parser/interface.ts.fixture.ts b/tests/parser/interface.ts.fixture.ts
index aacb138d03..f6b846daac 100644
--- a/tests/parser/interface.ts.fixture.ts
+++ b/tests/parser/interface.ts.fixture.ts
@@ -8,3 +8,10 @@ interface Boo {
   baz: i32;
   readonly baz2: f64;
 }
+interface Invalid {
+  @final
+  baz: i32;
+  baz2: f64;
+}
+// ERROR 1206: "Decorators are not valid here." in interface.ts(15,3+6)
+// ERROR 1042: "'declare' modifier cannot be used here." in interface.ts(16,3+7)
diff --git a/tests/parser/literals.ts b/tests/parser/literals.ts
index 1f445aeb77..6067eabaf7 100644
--- a/tests/parser/literals.ts
+++ b/tests/parser/literals.ts
@@ -98,3 +98,5 @@ tag`\unicode\xGG\u\x`; // see https://tc39.es/proposal-template-literal-revision
 5 c;
 6.7 d;
 a b;
+// ERROR 1005: "'}' expected." 
+`a${b`;
diff --git a/tests/parser/literals.ts.fixture.ts b/tests/parser/literals.ts.fixture.ts
index 8f7d004851..290ca6b93e 100644
--- a/tests/parser/literals.ts.fixture.ts
+++ b/tests/parser/literals.ts.fixture.ts
@@ -107,3 +107,5 @@ b;
 // ERROR 1125: "Hexadecimal digit expected." in literals.ts(94,4+1)
 // ERROR 1125: "Hexadecimal digit expected." in literals.ts(94,12+1)
 // ERROR 1125: "Hexadecimal digit expected." in literals.ts(94,16+1)
+// ERROR 1002: "Unterminated string literal." in literals.ts(102,6+3)
+// ERROR 1005: "'}' expected." in literals.ts(102,6+3)
diff --git a/tests/parser/module.ts b/tests/parser/module.ts
index c22817d3ea..a9c7d6fc22 100644
--- a/tests/parser/module.ts
+++ b/tests/parser/module.ts
@@ -1,2 +1,10 @@
 module "abc";
 declare module "abc";
+
+
+declare module `a \
+bc`;
+
+//ERROR 1038: "A 'declare' modifier cannot be used in an already ambient context."
+declare namespace A {declare module "abc"};
+
diff --git a/tests/parser/module.ts.fixture.ts b/tests/parser/module.ts.fixture.ts
index c22817d3ea..9d5dccc86d 100644
--- a/tests/parser/module.ts.fixture.ts
+++ b/tests/parser/module.ts.fixture.ts
@@ -1,2 +1,7 @@
 module "abc";
 declare module "abc";
+module`a bc`;
+declare namespace A {
+  module "abc";
+}
+// ERROR 1038: "A 'declare' modifier cannot be used in an already ambient context." in module.ts(9,22+7)
diff --git a/tests/parser/optional-typeparameters.ts b/tests/parser/optional-typeparameters.ts
index fd9ac6dc72..72b1fd698b 100644
--- a/tests/parser/optional-typeparameters.ts
+++ b/tests/parser/optional-typeparameters.ts
@@ -1,3 +1,4 @@
 function a<T=i32>(): T { return 0; }
 function a<T,U=i32>(): T { return 0; }
 function a<T,U=i32,V>(): T { return 0; } // ERROR 2706
+function b<T,U=() => void>(): T { return 0; } // ERROR 1003
\ No newline at end of file
diff --git a/tests/parser/optional-typeparameters.ts.fixture.ts b/tests/parser/optional-typeparameters.ts.fixture.ts
index 05cf48a0d0..eac5797f75 100644
--- a/tests/parser/optional-typeparameters.ts.fixture.ts
+++ b/tests/parser/optional-typeparameters.ts.fixture.ts
@@ -8,3 +8,4 @@ function a<T, U=i32, V>(): T {
   return 0;
 }
 // ERROR 2706: "Required type parameters may not follow optional type parameters." in optional-typeparameters.ts(3,20+1)
+// ERROR 1003: "Identifier expected." in optional-typeparameters.ts(4,16+10)
diff --git a/tests/parser/string-binding.ts b/tests/parser/string-binding.ts
index 876de12874..feef9d4e62 100644
--- a/tests/parser/string-binding.ts
+++ b/tests/parser/string-binding.ts
@@ -48,4 +48,7 @@ export class ExternalString {
   @binding(BindingCall.THIS, [ BindingType.OBJECT_HANDLE ], BindingType.PASS_THRU)
   @operator("==")
   equals(other: String): bool { return unreachable(); }
+  // ERROR 1005: "']' expected."
+  @binding(BindingCall.THIS, [, BindingType.OBJECT_HANDLE)
+  trimStartError(): String { return unreachable(); }
 }
diff --git a/tests/parser/string-binding.ts.fixture.ts b/tests/parser/string-binding.ts.fixture.ts
index 373498726c..9b9075a050 100644
--- a/tests/parser/string-binding.ts.fixture.ts
+++ b/tests/parser/string-binding.ts.fixture.ts
@@ -62,4 +62,9 @@ export class ExternalString {
   equals(other: String): bool {
     return unreachable();
   }
+  trimStartError(): String {
+    return unreachable();
+  }
 }
+// ERROR 1005: "']' expected." in string-binding.ts(52,45+13)
+// ERROR 1003: "Identifier expected." in string-binding.ts(52,45+13)
diff --git a/tests/parser/type-signature.ts b/tests/parser/type-signature.ts
index 1e28ea4bf5..0274b1050c 100644
--- a/tests/parser/type-signature.ts
+++ b/tests/parser/type-signature.ts
@@ -6,3 +6,17 @@ type foo = (this: AClass, a: i32) => i32;
 type foo = () => () => void;
 type foo = () => (() => void) | null;
 type foo = (this: AClass, a: i32) => ((this: BClass, b?: f32) => i32) | null;
+// ERROR 1005: "')' expected."
+type foo = (() => void | null;
+// ERROR 1005: "'|' expected."
+type foo = (() => void);
+//ERROR 1005: "'null' expected."
+type foo = () | void;
+
+type bar = (foo);
+// ERROR 1005: "')' expected."
+type bar = (foo;
+type bar = (true);
+type bar = (this);
+type bar = (null);
+type bar = ("a");
diff --git a/tests/parser/type-signature.ts.fixture.ts b/tests/parser/type-signature.ts.fixture.ts
index 1e28ea4bf5..57f3f5a776 100644
--- a/tests/parser/type-signature.ts.fixture.ts
+++ b/tests/parser/type-signature.ts.fixture.ts
@@ -6,3 +6,13 @@ type foo = (this: AClass, a: i32) => i32;
 type foo = () => () => void;
 type foo = () => (() => void) | null;
 type foo = (this: AClass, a: i32) => ((this: BClass, b?: f32) => i32) | null;
+type bar = foo;
+type bar = bool;
+type bar = this;
+type bar = null;
+type bar = string;
+// ERROR 1005: "')' expected." in type-signature.ts(10,26+4)
+// ERROR 1005: "'|' expected." in type-signature.ts(12,23+1)
+// ERROR 1005: "'=>' expected." in type-signature.ts(14,13+1)
+// ERROR 1012: "Unexpected token." in type-signature.ts(14,13+1)
+// ERROR 1005: "')' expected." in type-signature.ts(18,16+0)