diff --git a/tests/cases/fourslash/fourslash.ts b/tests/cases/fourslash/fourslash.ts
index c71f8987bdf..c0372d46063 100644
--- a/tests/cases/fourslash/fourslash.ts
+++ b/tests/cases/fourslash/fourslash.ts
@@ -301,11 +301,11 @@ module FourSlashInterface {
             FourSlash.currentTestState.verifySignatureHelpArgumentCount(expected);
         }
 
-        public currentSignatureParamterCountIs(expected: number) {
+        public currentSignatureParameterCountIs(expected: number) {
             FourSlash.currentTestState.verifyCurrentSignatureHelpParameterCount(expected);
         }
 
-        public currentSignatureTypeParamterCountIs(expected: number) {
+        public currentSignatureTypeParameterCountIs(expected: number) {
             FourSlash.currentTestState.verifyCurrentSignatureHelpTypeParameterCount(expected);
         }
 
diff --git a/tests/cases/fourslash/genericParameterHelp.ts b/tests/cases/fourslash/genericParameterHelp.ts
index 17882485fd7..6bbb957f0f9 100644
--- a/tests/cases/fourslash/genericParameterHelp.ts
+++ b/tests/cases/fourslash/genericParameterHelp.ts
@@ -14,7 +14,7 @@
 ////testFunction<, ,/*5*/>(null, null, null);
 
 // goTo.marker("1");
-//  verify.currentSignatureParamterCountIs(3);
+//  verify.currentSignatureParameterCountIs(3);
 //  verify.currentSignatureHelpIs("testFunction<T extends IFoo, U, M extends IFoo>(a: T, b: U, c: M): M");
 
 //  verify.currentParameterHelpArgumentNameIs("T");
diff --git a/tests/cases/fourslash/signatureHelpAnonymousFunction.ts b/tests/cases/fourslash/signatureHelpAnonymousFunction.ts
index cc723c713d6..ba812a2f8d3 100644
--- a/tests/cases/fourslash/signatureHelpAnonymousFunction.ts
+++ b/tests/cases/fourslash/signatureHelpAnonymousFunction.ts
@@ -7,7 +7,7 @@
 
 goTo.marker('anonymousFunction1');
 verify.signatureHelpCountIs(1);
-verify.currentSignatureParamterCountIs(2);
+verify.currentSignatureParameterCountIs(2);
 verify.currentSignatureHelpIs('(a: number, b: string): string');
 verify.currentParameterHelpArgumentNameIs("a");
 verify.currentParameterSpanIs("a: number");
diff --git a/tests/cases/fourslash/signatureHelpAtEOF.ts b/tests/cases/fourslash/signatureHelpAtEOF.ts
index 64c4aaeeb2c..d2e1fa0418d 100644
--- a/tests/cases/fourslash/signatureHelpAtEOF.ts
+++ b/tests/cases/fourslash/signatureHelpAtEOF.ts
@@ -10,6 +10,6 @@ verify.signatureHelpPresent();
 verify.signatureHelpCountIs(1);
 
 verify.currentSignatureHelpIs("Foo(arg1: string, arg2: string): void");
-verify.currentSignatureParamterCountIs(2);
+verify.currentSignatureParameterCountIs(2);
 verify.currentParameterHelpArgumentNameIs("arg1");
 verify.currentParameterSpanIs("arg1: string");
\ No newline at end of file
diff --git a/tests/cases/fourslash/signatureHelpBeforeSemicolon1.ts b/tests/cases/fourslash/signatureHelpBeforeSemicolon1.ts
index 2b0b07056bf..d3bdd42ef1a 100644
--- a/tests/cases/fourslash/signatureHelpBeforeSemicolon1.ts
+++ b/tests/cases/fourslash/signatureHelpBeforeSemicolon1.ts
@@ -10,6 +10,6 @@ verify.signatureHelpPresent();
 verify.signatureHelpCountIs(1);
 
 verify.currentSignatureHelpIs("Foo(arg1: string, arg2: string): void");
-verify.currentSignatureParamterCountIs(2);
+verify.currentSignatureParameterCountIs(2);
 verify.currentParameterHelpArgumentNameIs("arg1");
 verify.currentParameterSpanIs("arg1: string");
\ No newline at end of file
diff --git a/tests/cases/fourslash/signatureHelpCallExpression.ts b/tests/cases/fourslash/signatureHelpCallExpression.ts
index 50d89aaae4e..fd9758cfa54 100644
--- a/tests/cases/fourslash/signatureHelpCallExpression.ts
+++ b/tests/cases/fourslash/signatureHelpCallExpression.ts
@@ -5,7 +5,7 @@
 
 goTo.marker('1');
 verify.signatureHelpCountIs(1);
-verify.currentSignatureParamterCountIs(2);
+verify.currentSignatureParameterCountIs(2);
 verify.currentSignatureHelpIs('fnTest(str: string, num: number): void');
 
 verify.currentParameterHelpArgumentNameIs('str');
diff --git a/tests/cases/fourslash/signatureHelpConstructExpression.ts b/tests/cases/fourslash/signatureHelpConstructExpression.ts
index a88cb3fce68..00efee0a479 100644
--- a/tests/cases/fourslash/signatureHelpConstructExpression.ts
+++ b/tests/cases/fourslash/signatureHelpConstructExpression.ts
@@ -6,7 +6,7 @@
 goTo.marker('1');
 verify.signatureHelpCountIs(1);
 
-verify.currentSignatureParamterCountIs(2);
+verify.currentSignatureParameterCountIs(2);
 verify.currentSignatureHelpIs('sampleCls(str: string, num: number): sampleCls');
 
 verify.currentParameterHelpArgumentNameIs('str');
diff --git a/tests/cases/fourslash/signatureHelpConstructorInheritance.ts b/tests/cases/fourslash/signatureHelpConstructorInheritance.ts
index b066eab3fd4..a2e683d69bb 100644
--- a/tests/cases/fourslash/signatureHelpConstructorInheritance.ts
+++ b/tests/cases/fourslash/signatureHelpConstructorInheritance.ts
@@ -16,7 +16,7 @@
 
 goTo.marker('indirectSuperCall');
 verify.signatureHelpCountIs(2);
-verify.currentSignatureParamterCountIs(1);
+verify.currentSignatureParameterCountIs(1);
 verify.currentSignatureHelpIs('B2(n: number): B2');
 verify.currentParameterHelpArgumentNameIs("n");
 verify.currentParameterSpanIs("n: number");
diff --git a/tests/cases/fourslash/signatureHelpConstructorOverload.ts b/tests/cases/fourslash/signatureHelpConstructorOverload.ts
index ce276e09d8f..9aab48f71ae 100644
--- a/tests/cases/fourslash/signatureHelpConstructorOverload.ts
+++ b/tests/cases/fourslash/signatureHelpConstructorOverload.ts
@@ -6,11 +6,11 @@
 
 goTo.marker('1');
 verify.signatureHelpCountIs(2);
-verify.currentSignatureParamterCountIs(0);
+verify.currentSignatureParameterCountIs(0);
 verify.currentSignatureHelpIs('clsOverload(): clsOverload');
 
 goTo.marker('2');
-verify.currentSignatureParamterCountIs(1);
+verify.currentSignatureParameterCountIs(1);
 verify.currentSignatureHelpIs('clsOverload(test: string): clsOverload');
 verify.currentParameterHelpArgumentNameIs('test');
 verify.currentParameterSpanIs("test: string");
\ No newline at end of file
diff --git a/tests/cases/fourslash/signatureHelpEmptyList.ts b/tests/cases/fourslash/signatureHelpEmptyList.ts
index 6ea70159dcc..b6318656f4f 100644
--- a/tests/cases/fourslash/signatureHelpEmptyList.ts
+++ b/tests/cases/fourslash/signatureHelpEmptyList.ts
@@ -12,7 +12,7 @@ verify.signatureHelpPresent();
 verify.signatureHelpCountIs(1);
 
 verify.currentSignatureHelpIs("Foo(arg1: string, arg2: string): void");
-verify.currentSignatureParamterCountIs(2);
+verify.currentSignatureParameterCountIs(2);
 verify.currentParameterHelpArgumentNameIs("arg1");
 verify.currentParameterSpanIs("arg1: string");
 
diff --git a/tests/cases/fourslash/signatureHelpFunctionOverload.ts b/tests/cases/fourslash/signatureHelpFunctionOverload.ts
index 2c1cdb51291..cc02ba12570 100644
--- a/tests/cases/fourslash/signatureHelpFunctionOverload.ts
+++ b/tests/cases/fourslash/signatureHelpFunctionOverload.ts
@@ -8,11 +8,11 @@
 
 goTo.marker('functionOverload1');
 verify.signatureHelpCountIs(2);
-verify.currentSignatureParamterCountIs(0);
+verify.currentSignatureParameterCountIs(0);
 verify.currentSignatureHelpIs('functionOverload(): any');
 
 goTo.marker('functionOverload2');
-verify.currentSignatureParamterCountIs(1);
+verify.currentSignatureParameterCountIs(1);
 verify.currentSignatureHelpIs('functionOverload(test: string): any');
 verify.currentParameterHelpArgumentNameIs("test");
 verify.currentParameterSpanIs("test: string");
\ No newline at end of file
diff --git a/tests/cases/fourslash/signatureHelpFunctionParameter.ts b/tests/cases/fourslash/signatureHelpFunctionParameter.ts
index cb2264f2c42..b61e56dedcb 100644
--- a/tests/cases/fourslash/signatureHelpFunctionParameter.ts
+++ b/tests/cases/fourslash/signatureHelpFunctionParameter.ts
@@ -6,7 +6,7 @@
 
 goTo.marker('parameterFunction1');
 verify.signatureHelpCountIs(1);
-verify.currentSignatureParamterCountIs(2);
+verify.currentSignatureParameterCountIs(2);
 verify.currentSignatureHelpIs('callback(a: number, b: string): void');
 verify.currentParameterHelpArgumentNameIs("a");
 verify.currentParameterSpanIs("a: number");
diff --git a/tests/cases/fourslash/signatureHelpImplicitConstructor.ts b/tests/cases/fourslash/signatureHelpImplicitConstructor.ts
index 9e42d25dbe9..4324767d00a 100644
--- a/tests/cases/fourslash/signatureHelpImplicitConstructor.ts
+++ b/tests/cases/fourslash/signatureHelpImplicitConstructor.ts
@@ -7,4 +7,4 @@
 goTo.marker();
 verify.signatureHelpCountIs(1);
 verify.currentSignatureHelpIs("ImplicitConstructor(): ImplicitConstructor");
-verify.currentSignatureParamterCountIs(0);
+verify.currentSignatureParameterCountIs(0);
diff --git a/tests/cases/fourslash/signatureHelpIncompleteCalls.ts b/tests/cases/fourslash/signatureHelpIncompleteCalls.ts
index e73217b1d8c..ec4fcccc0fe 100644
--- a/tests/cases/fourslash/signatureHelpIncompleteCalls.ts
+++ b/tests/cases/fourslash/signatureHelpIncompleteCalls.ts
@@ -17,13 +17,13 @@
 
 goTo.marker('incompleteCalls1');
 verify.currentSignatureHelpIs("f1(): void");
-verify.currentSignatureParamterCountIs(0);
+verify.currentSignatureParameterCountIs(0);
 
 goTo.marker('incompleteCalls2');
-verify.currentSignatureParamterCountIs(1);
+verify.currentSignatureParameterCountIs(1);
 verify.currentSignatureHelpIs("f2(n: number): number");
 goTo.marker('incompleteCalls3');
-verify.currentSignatureParamterCountIs(2);
+verify.currentSignatureParameterCountIs(2);
 verify.currentSignatureHelpIs("f3(n: number, s: string): string");
 
 verify.currentParameterHelpArgumentNameIs("s");
diff --git a/tests/cases/fourslash/signatureHelpObjectLiteral.ts b/tests/cases/fourslash/signatureHelpObjectLiteral.ts
index cbc5df697b9..6853c3fee36 100644
--- a/tests/cases/fourslash/signatureHelpObjectLiteral.ts
+++ b/tests/cases/fourslash/signatureHelpObjectLiteral.ts
@@ -1,17 +1,17 @@
 /// <reference path='fourslash.ts' />
 
 ////var objectLiteral = { n: 5, s: "", f: (a: number, b: string) => "" };
-////objectLiteral.f(/*objectLiteral1*/4, /*objectLiteral2*/"");
-
-goTo.marker('objectLiteral1');
-verify.signatureHelpCountIs(1);
-verify.currentSignatureParamterCountIs(2);
-verify.currentSignatureHelpIs('f(a: number, b: string): string');
-
-verify.currentParameterHelpArgumentNameIs("a");
-verify.currentParameterSpanIs("a: number");
-
-goTo.marker('objectLiteral2');
-verify.currentSignatureHelpIs('f(a: number, b: string): string');
+////objectLiteral.f(/*objectLiteral1*/4, /*objectLiteral2*/"");
+
+goTo.marker('objectLiteral1');
+verify.signatureHelpCountIs(1);
+verify.currentSignatureParameterCountIs(2);
+verify.currentSignatureHelpIs('f(a: number, b: string): string');
+
+verify.currentParameterHelpArgumentNameIs("a");
+verify.currentParameterSpanIs("a: number");
+
+goTo.marker('objectLiteral2');
+verify.currentSignatureHelpIs('f(a: number, b: string): string');
 verify.currentParameterHelpArgumentNameIs("b");
 verify.currentParameterSpanIs("b: string");
\ No newline at end of file
diff --git a/tests/cases/fourslash/signatureHelpOnOverloadsDifferentArity3.ts b/tests/cases/fourslash/signatureHelpOnOverloadsDifferentArity3.ts
index c217a12ef58..f9754c7d1fd 100644
--- a/tests/cases/fourslash/signatureHelpOnOverloadsDifferentArity3.ts
+++ b/tests/cases/fourslash/signatureHelpOnOverloadsDifferentArity3.ts
@@ -10,17 +10,17 @@
 goTo.marker();
 verify.signatureHelpCountIs(4);
 verify.currentSignatureHelpIs("f(): any");
-verify.currentSignatureParamterCountIs(0);
+verify.currentSignatureParameterCountIs(0);
 verify.signatureHelpArgumentCountIs(0);
 
 edit.insert(", ");
 verify.signatureHelpCountIs(4);
 verify.currentSignatureHelpIs("f(s: string, b: boolean): any");
-verify.currentSignatureParamterCountIs(2);
+verify.currentSignatureParameterCountIs(2);
 verify.currentParameterHelpArgumentNameIs("b");
 verify.currentParameterSpanIs("b: boolean");
 
 edit.insert(", ");
 verify.signatureHelpCountIs(4);
 verify.currentSignatureHelpIs("f(s: string, b: boolean): any");
-verify.currentSignatureParamterCountIs(2);
\ No newline at end of file
+verify.currentSignatureParameterCountIs(2);
\ No newline at end of file
diff --git a/tests/cases/fourslash/signatureHelpSuperConstructorOverload.ts b/tests/cases/fourslash/signatureHelpSuperConstructorOverload.ts
index 1be8c3202a1..aa2e3e4856c 100644
--- a/tests/cases/fourslash/signatureHelpSuperConstructorOverload.ts
+++ b/tests/cases/fourslash/signatureHelpSuperConstructorOverload.ts
@@ -20,9 +20,9 @@
 goTo.marker('superOverload1');
 verify.signatureHelpCountIs(2);
 verify.currentSignatureHelpIs("SuperOverloadlBase(): SuperOverloadlBase");
-verify.currentSignatureParamterCountIs(0);
+verify.currentSignatureParameterCountIs(0);
 goTo.marker('superOverload2');
-verify.currentSignatureParamterCountIs(1);
+verify.currentSignatureParameterCountIs(1);
 verify.currentSignatureHelpIs("SuperOverloadlBase(test: string): SuperOverloadlBase");
 verify.currentParameterHelpArgumentNameIs("test");
 verify.currentParameterSpanIs("test: string");
\ No newline at end of file
diff --git a/tests/cases/fourslash/signatureHelpTaggedTemplates1.ts b/tests/cases/fourslash/signatureHelpTaggedTemplates1.ts
index 78b4b586a0c..39644ba8c24 100644
--- a/tests/cases/fourslash/signatureHelpTaggedTemplates1.ts
+++ b/tests/cases/fourslash/signatureHelpTaggedTemplates1.ts
@@ -11,7 +11,7 @@ test.markers().forEach(m => {
     verify.signatureHelpCountIs(1);
     verify.signatureHelpArgumentCountIs(4);
 
-    verify.currentSignatureParamterCountIs(4);
+    verify.currentSignatureParameterCountIs(4);
     verify.currentSignatureHelpIs('f(templateStrings: any, x: any, y: any, z: any): number');
     verify.currentParameterHelpArgumentNameIs("templateStrings");
     verify.currentParameterSpanIs("templateStrings: any");
diff --git a/tests/cases/fourslash/signatureHelpTaggedTemplates2.ts b/tests/cases/fourslash/signatureHelpTaggedTemplates2.ts
index c4b75657be5..123a6cc4c2c 100644
--- a/tests/cases/fourslash/signatureHelpTaggedTemplates2.ts
+++ b/tests/cases/fourslash/signatureHelpTaggedTemplates2.ts
@@ -11,7 +11,7 @@ test.markers().forEach(m => {
     verify.signatureHelpCountIs(1);
     verify.signatureHelpArgumentCountIs(4);
 
-    verify.currentSignatureParamterCountIs(4);
+    verify.currentSignatureParameterCountIs(4);
     verify.currentSignatureHelpIs('f(templateStrings: any, x: any, y: any, z: any): number');
     verify.currentParameterHelpArgumentNameIs("templateStrings");
     verify.currentParameterSpanIs("templateStrings: any");
diff --git a/tests/cases/fourslash/signatureHelpTaggedTemplates3.ts b/tests/cases/fourslash/signatureHelpTaggedTemplates3.ts
index 2616a0797be..f203468ca04 100644
--- a/tests/cases/fourslash/signatureHelpTaggedTemplates3.ts
+++ b/tests/cases/fourslash/signatureHelpTaggedTemplates3.ts
@@ -11,7 +11,7 @@ test.markers().forEach(m => {
     verify.signatureHelpCountIs(1);
     verify.signatureHelpArgumentCountIs(4);
 
-    verify.currentSignatureParamterCountIs(4);
+    verify.currentSignatureParameterCountIs(4);
     verify.currentSignatureHelpIs('f(templateStrings: any, x: any, y: any, z: any): number');
     verify.currentParameterHelpArgumentNameIs("x");
     verify.currentParameterSpanIs("x: any");
diff --git a/tests/cases/fourslash/signatureHelpTaggedTemplates4.ts b/tests/cases/fourslash/signatureHelpTaggedTemplates4.ts
index 995eddf3f65..13ee47a3309 100644
--- a/tests/cases/fourslash/signatureHelpTaggedTemplates4.ts
+++ b/tests/cases/fourslash/signatureHelpTaggedTemplates4.ts
@@ -11,7 +11,7 @@ test.markers().forEach(m => {
     verify.signatureHelpCountIs(1);
     verify.signatureHelpArgumentCountIs(4);
 
-    verify.currentSignatureParamterCountIs(4);
+    verify.currentSignatureParameterCountIs(4);
     verify.currentSignatureHelpIs('f(templateStrings: any, x: any, y: any, z: any): number');
     verify.currentParameterHelpArgumentNameIs("y");
     verify.currentParameterSpanIs("y: any");
diff --git a/tests/cases/fourslash/signatureHelpTaggedTemplates5.ts b/tests/cases/fourslash/signatureHelpTaggedTemplates5.ts
index 01bd606cbf5..7cd2affd675 100644
--- a/tests/cases/fourslash/signatureHelpTaggedTemplates5.ts
+++ b/tests/cases/fourslash/signatureHelpTaggedTemplates5.ts
@@ -11,7 +11,7 @@ test.markers().forEach(m => {
     verify.signatureHelpCountIs(1);
     verify.signatureHelpArgumentCountIs(4);
 
-    verify.currentSignatureParamterCountIs(4);
+    verify.currentSignatureParameterCountIs(4);
     verify.currentSignatureHelpIs('f(templateStrings: any, x: any, y: any, z: any): number');
     verify.currentParameterHelpArgumentNameIs("z");
     verify.currentParameterSpanIs("z: any");
diff --git a/tests/cases/fourslash/signatureHelpTaggedTemplates6.ts b/tests/cases/fourslash/signatureHelpTaggedTemplates6.ts
index 71b85b1821b..7671666bb54 100644
--- a/tests/cases/fourslash/signatureHelpTaggedTemplates6.ts
+++ b/tests/cases/fourslash/signatureHelpTaggedTemplates6.ts
@@ -11,7 +11,7 @@ test.markers().forEach(m => {
     verify.signatureHelpCountIs(1);
     verify.signatureHelpArgumentCountIs(1);
 
-    verify.currentSignatureParamterCountIs(4);
+    verify.currentSignatureParameterCountIs(4);
     verify.currentSignatureHelpIs('g(templateStrings: any, x: any, y: any, z: any): string');
     verify.currentParameterHelpArgumentNameIs("templateStrings");
     verify.currentParameterSpanIs("templateStrings: any");
diff --git a/tests/cases/fourslash/signatureHelpTaggedTemplates7.ts b/tests/cases/fourslash/signatureHelpTaggedTemplates7.ts
index ddb120b4089..35bed336f39 100644
--- a/tests/cases/fourslash/signatureHelpTaggedTemplates7.ts
+++ b/tests/cases/fourslash/signatureHelpTaggedTemplates7.ts
@@ -11,7 +11,7 @@ test.markers().forEach(m => {
     verify.signatureHelpCountIs(1);
     verify.signatureHelpArgumentCountIs(1);
 
-    verify.currentSignatureParamterCountIs(4);
+    verify.currentSignatureParameterCountIs(4);
     verify.currentSignatureHelpIs('f(templateStrings: any, x: any, y: any, z: any): number');
     verify.currentParameterHelpArgumentNameIs("templateStrings");
     verify.currentParameterSpanIs("templateStrings: any");
diff --git a/tests/cases/fourslash/signatureHelpTaggedTemplatesIncomplete1.ts b/tests/cases/fourslash/signatureHelpTaggedTemplatesIncomplete1.ts
index edc6b932e5f..1da96ea5c1b 100644
--- a/tests/cases/fourslash/signatureHelpTaggedTemplatesIncomplete1.ts
+++ b/tests/cases/fourslash/signatureHelpTaggedTemplatesIncomplete1.ts
@@ -11,7 +11,7 @@ test.markers().forEach(m => {
     verify.signatureHelpCountIs(1);
     verify.signatureHelpArgumentCountIs(2);
 
-    verify.currentSignatureParamterCountIs(4);
+    verify.currentSignatureParameterCountIs(4);
     verify.currentSignatureHelpIs('f(templateStrings: any, x: any, y: any, z: any): number');
     verify.currentParameterHelpArgumentNameIs("templateStrings");
     verify.currentParameterSpanIs("templateStrings: any");
diff --git a/tests/cases/fourslash/signatureHelpTaggedTemplatesIncomplete2.ts b/tests/cases/fourslash/signatureHelpTaggedTemplatesIncomplete2.ts
index 51ca619c4be..68ff7202f01 100644
--- a/tests/cases/fourslash/signatureHelpTaggedTemplatesIncomplete2.ts
+++ b/tests/cases/fourslash/signatureHelpTaggedTemplatesIncomplete2.ts
@@ -11,7 +11,7 @@ test.markers().forEach(m => {
     verify.signatureHelpCountIs(1);
     verify.signatureHelpArgumentCountIs(2);
 
-    verify.currentSignatureParamterCountIs(4);
+    verify.currentSignatureParameterCountIs(4);
     verify.currentSignatureHelpIs('f(templateStrings: any, x: any, y: any, z: any): number');
     verify.currentParameterHelpArgumentNameIs("x");
     verify.currentParameterSpanIs("x: any");
diff --git a/tests/cases/fourslash/signatureHelpTaggedTemplatesIncomplete3.ts b/tests/cases/fourslash/signatureHelpTaggedTemplatesIncomplete3.ts
index 05aaef5bc50..8165da7f67b 100644
--- a/tests/cases/fourslash/signatureHelpTaggedTemplatesIncomplete3.ts
+++ b/tests/cases/fourslash/signatureHelpTaggedTemplatesIncomplete3.ts
@@ -11,7 +11,7 @@ test.markers().forEach(m => {
     verify.signatureHelpCountIs(1);
     verify.signatureHelpArgumentCountIs(2);
 
-    verify.currentSignatureParamterCountIs(4);
+    verify.currentSignatureParameterCountIs(4);
     verify.currentSignatureHelpIs('f(templateStrings: any, x: any, y: any, z: any): number');
     verify.currentParameterHelpArgumentNameIs("templateStrings");
     verify.currentParameterSpanIs("templateStrings: any");
diff --git a/tests/cases/fourslash/signatureHelpTaggedTemplatesIncomplete4.ts b/tests/cases/fourslash/signatureHelpTaggedTemplatesIncomplete4.ts
index e615f0156c0..8c970b60c77 100644
--- a/tests/cases/fourslash/signatureHelpTaggedTemplatesIncomplete4.ts
+++ b/tests/cases/fourslash/signatureHelpTaggedTemplatesIncomplete4.ts
@@ -11,7 +11,7 @@ test.markers().forEach(m => {
     verify.signatureHelpCountIs(1);
     verify.signatureHelpArgumentCountIs(3);
 
-    verify.currentSignatureParamterCountIs(4);
+    verify.currentSignatureParameterCountIs(4);
     verify.currentSignatureHelpIs('f(templateStrings: any, x: any, y: any, z: any): number');
     verify.currentParameterHelpArgumentNameIs("y");
     verify.currentParameterSpanIs("y: any");
diff --git a/tests/cases/fourslash/signatureHelpTaggedTemplatesIncomplete5.ts b/tests/cases/fourslash/signatureHelpTaggedTemplatesIncomplete5.ts
index 531ce46b3c8..f93da36ce5c 100644
--- a/tests/cases/fourslash/signatureHelpTaggedTemplatesIncomplete5.ts
+++ b/tests/cases/fourslash/signatureHelpTaggedTemplatesIncomplete5.ts
@@ -11,7 +11,7 @@ test.markers().forEach(m => {
     verify.signatureHelpCountIs(1);
     verify.signatureHelpArgumentCountIs(3);
 
-    verify.currentSignatureParamterCountIs(4);
+    verify.currentSignatureParameterCountIs(4);
     verify.currentSignatureHelpIs('f(templateStrings: any, x: any, y: any, z: any): number');
     verify.currentParameterHelpArgumentNameIs("templateStrings");
     verify.currentParameterSpanIs("templateStrings: any");
diff --git a/tests/cases/fourslash/signatureHelpTaggedTemplatesIncomplete6.ts b/tests/cases/fourslash/signatureHelpTaggedTemplatesIncomplete6.ts
index fcfd569daff..10d81eb80f4 100644
--- a/tests/cases/fourslash/signatureHelpTaggedTemplatesIncomplete6.ts
+++ b/tests/cases/fourslash/signatureHelpTaggedTemplatesIncomplete6.ts
@@ -11,7 +11,7 @@ test.markers().forEach(m => {
     verify.signatureHelpCountIs(1);
     verify.signatureHelpArgumentCountIs(3);
 
-    verify.currentSignatureParamterCountIs(4);
+    verify.currentSignatureParameterCountIs(4);
     verify.currentSignatureHelpIs('f(templateStrings: any, x: any, y: any, z: any): number');
     verify.currentParameterHelpArgumentNameIs("y");
     verify.currentParameterSpanIs("y: any");
diff --git a/tests/cases/fourslash/signatureHelpTaggedTemplatesNested1.ts b/tests/cases/fourslash/signatureHelpTaggedTemplatesNested1.ts
index a20e43b20bc..a3c9f7ccce4 100644
--- a/tests/cases/fourslash/signatureHelpTaggedTemplatesNested1.ts
+++ b/tests/cases/fourslash/signatureHelpTaggedTemplatesNested1.ts
@@ -10,6 +10,6 @@ test.markers().forEach(m => {
 
     verify.signatureHelpCountIs(1);
 
-    verify.currentSignatureParamterCountIs(4);
+    verify.currentSignatureParameterCountIs(4);
     verify.currentSignatureHelpIs('g(templateStrings: any, x: any, y: any, z: any): string');
 });
\ No newline at end of file
diff --git a/tests/cases/fourslash/signatureHelpTaggedTemplatesNested2.ts b/tests/cases/fourslash/signatureHelpTaggedTemplatesNested2.ts
index 488209dfac7..d72fa74d985 100644
--- a/tests/cases/fourslash/signatureHelpTaggedTemplatesNested2.ts
+++ b/tests/cases/fourslash/signatureHelpTaggedTemplatesNested2.ts
@@ -4,13 +4,12 @@
 //// function g(templateStrings, x, y, z) { return ""; }
 //// 
 //// f `/*1*/a $/*2*/{ /*3*/g /*4*/`alpha ${ 123 } beta ${ 456 } gamma`/*5*/ }/*6*/ b $/*7*/{ /*8*/g /*9*/`txt`/*10*/ } /*11*/c ${ /*12*/g /*13*/`aleph ${ 123 } beit`/*14*/ } d/*15*/`;
-debugger;
 
 test.markers().forEach(m => {
     goTo.position(m.position);
 
     verify.signatureHelpCountIs(1);
 
-    verify.currentSignatureParamterCountIs(4);
+    verify.currentSignatureParameterCountIs(4);
     verify.currentSignatureHelpIs('f(templateStrings: any, x: any, y: any, z: any): number');
 });
\ No newline at end of file
diff --git a/tests/cases/fourslash/signatureHelpTaggedTemplatesWithOverloadedTags1.ts b/tests/cases/fourslash/signatureHelpTaggedTemplatesWithOverloadedTags1.ts
index 608af7dbb96..6850b1bc54f 100644
--- a/tests/cases/fourslash/signatureHelpTaggedTemplatesWithOverloadedTags1.ts
+++ b/tests/cases/fourslash/signatureHelpTaggedTemplatesWithOverloadedTags1.ts
@@ -13,7 +13,7 @@ test.markers().forEach(m => {
     verify.signatureHelpCountIs(3);
     verify.signatureHelpArgumentCountIs(2);
 
-    verify.currentSignatureParamterCountIs(2);
+    verify.currentSignatureParameterCountIs(2);
     verify.currentSignatureHelpIs('f(templateStrings: string[], p1_o1: string): number');
     verify.currentParameterHelpArgumentNameIs("templateStrings");
     verify.currentParameterSpanIs("templateStrings: string[]");
diff --git a/tests/cases/fourslash/signatureHelpTaggedTemplatesWithOverloadedTags2.ts b/tests/cases/fourslash/signatureHelpTaggedTemplatesWithOverloadedTags2.ts
index c7908bdb52a..8466c6b05f2 100644
--- a/tests/cases/fourslash/signatureHelpTaggedTemplatesWithOverloadedTags2.ts
+++ b/tests/cases/fourslash/signatureHelpTaggedTemplatesWithOverloadedTags2.ts
@@ -13,7 +13,7 @@ test.markers().forEach(m => {
     verify.signatureHelpCountIs(3);
     verify.signatureHelpArgumentCountIs(2);
 
-    verify.currentSignatureParamterCountIs(2);
+    verify.currentSignatureParameterCountIs(2);
     verify.currentSignatureHelpIs('f(templateStrings: string[], p1_o1: string): number');
     verify.currentParameterHelpArgumentNameIs("p1_o1");
     verify.currentParameterSpanIs("p1_o1: string");
diff --git a/tests/cases/fourslash/signatureHelpTaggedTemplatesWithOverloadedTags3.ts b/tests/cases/fourslash/signatureHelpTaggedTemplatesWithOverloadedTags3.ts
index 22256db1f0e..3843ed34b16 100644
--- a/tests/cases/fourslash/signatureHelpTaggedTemplatesWithOverloadedTags3.ts
+++ b/tests/cases/fourslash/signatureHelpTaggedTemplatesWithOverloadedTags3.ts
@@ -13,7 +13,7 @@ test.markers().forEach(m => {
     verify.signatureHelpCountIs(3);
     verify.signatureHelpArgumentCountIs(3);
 
-    verify.currentSignatureParamterCountIs(4);
+    verify.currentSignatureParameterCountIs(4);
     verify.currentSignatureHelpIs('f(templateStrings: string[], p1_o3: string, p2_o3: boolean, p3_o3: number): boolean');
     verify.currentParameterHelpArgumentNameIs("p1_o3");
     verify.currentParameterSpanIs("p1_o3: string");
diff --git a/tests/cases/fourslash/signatureHelpTaggedTemplatesWithOverloadedTags4.ts b/tests/cases/fourslash/signatureHelpTaggedTemplatesWithOverloadedTags4.ts
index 700cc2194bf..a1072366a98 100644
--- a/tests/cases/fourslash/signatureHelpTaggedTemplatesWithOverloadedTags4.ts
+++ b/tests/cases/fourslash/signatureHelpTaggedTemplatesWithOverloadedTags4.ts
@@ -13,7 +13,7 @@ test.markers().forEach(m => {
     verify.signatureHelpCountIs(3);
     verify.signatureHelpArgumentCountIs(3);
 
-    verify.currentSignatureParamterCountIs(4);
+    verify.currentSignatureParameterCountIs(4);
     verify.currentSignatureHelpIs('f(templateStrings: string[], p1_o2: number, p2_o2: number, p3_o2: number): string');
     verify.currentParameterHelpArgumentNameIs("p1_o2");
     verify.currentParameterSpanIs("p1_o2: number");
diff --git a/tests/cases/fourslash/signatureHelpTaggedTemplatesWithOverloadedTags5.ts b/tests/cases/fourslash/signatureHelpTaggedTemplatesWithOverloadedTags5.ts
index 20701c0e98d..2646e70b39c 100644
--- a/tests/cases/fourslash/signatureHelpTaggedTemplatesWithOverloadedTags5.ts
+++ b/tests/cases/fourslash/signatureHelpTaggedTemplatesWithOverloadedTags5.ts
@@ -13,7 +13,7 @@ test.markers().forEach(m => {
     verify.signatureHelpCountIs(3);
     verify.signatureHelpArgumentCountIs(3);
 
-    verify.currentSignatureParamterCountIs(4);
+    verify.currentSignatureParameterCountIs(4);
     verify.currentSignatureHelpIs('f(templateStrings: string[], p1_o2: number, p2_o2: number, p3_o2: number): string');
     verify.currentParameterHelpArgumentNameIs("p2_o2");
     verify.currentParameterSpanIs("p2_o2: number");
diff --git a/tests/cases/fourslash/signatureHelpTaggedTemplatesWithOverloadedTags6.ts b/tests/cases/fourslash/signatureHelpTaggedTemplatesWithOverloadedTags6.ts
index 7bfd17c254a..62410a5fda3 100644
--- a/tests/cases/fourslash/signatureHelpTaggedTemplatesWithOverloadedTags6.ts
+++ b/tests/cases/fourslash/signatureHelpTaggedTemplatesWithOverloadedTags6.ts
@@ -13,7 +13,7 @@ test.markers().forEach(m => {
     verify.signatureHelpCountIs(3);
     verify.signatureHelpArgumentCountIs(3);
 
-    verify.currentSignatureParamterCountIs(4);
+    verify.currentSignatureParameterCountIs(4);
     verify.currentSignatureHelpIs('f(templateStrings: string[], p1_o2: number, p2_o2: number, p3_o2: number): string');
     verify.currentParameterHelpArgumentNameIs("p2_o2");
     verify.currentParameterSpanIs("p2_o2: number");
diff --git a/tests/cases/fourslash/signatureHelpTaggedTemplatesWithOverloadedTags7.ts b/tests/cases/fourslash/signatureHelpTaggedTemplatesWithOverloadedTags7.ts
index 4f747d3d8eb..9a24aacf86b 100644
--- a/tests/cases/fourslash/signatureHelpTaggedTemplatesWithOverloadedTags7.ts
+++ b/tests/cases/fourslash/signatureHelpTaggedTemplatesWithOverloadedTags7.ts
@@ -13,7 +13,7 @@ test.markers().forEach(m => {
     verify.signatureHelpCountIs(3);
     verify.signatureHelpArgumentCountIs(3);
 
-    verify.currentSignatureParamterCountIs(4);
+    verify.currentSignatureParameterCountIs(4);
     verify.currentSignatureHelpIs('f(templateStrings: string[], p1_o3: string, p2_o3: boolean, p3_o3: number): boolean');
     verify.currentParameterHelpArgumentNameIs("p2_o3");
     verify.currentParameterSpanIs("p2_o3: boolean");
diff --git a/tests/cases/fourslash/signatureHelpTaggedTemplatesWithOverloadedTags8.ts b/tests/cases/fourslash/signatureHelpTaggedTemplatesWithOverloadedTags8.ts
index f97c2569730..8000f15d3c6 100644
--- a/tests/cases/fourslash/signatureHelpTaggedTemplatesWithOverloadedTags8.ts
+++ b/tests/cases/fourslash/signatureHelpTaggedTemplatesWithOverloadedTags8.ts
@@ -13,7 +13,7 @@ test.markers().forEach(m => {
     verify.signatureHelpCountIs(3);
     verify.signatureHelpArgumentCountIs(4);
 
-    verify.currentSignatureParamterCountIs(4);
+    verify.currentSignatureParameterCountIs(4);
     verify.currentSignatureHelpIs('f(templateStrings: string[], p1_o2: number, p2_o2: number, p3_o2: number): string');
     verify.currentParameterHelpArgumentNameIs("p3_o2");
     verify.currentParameterSpanIs("p3_o2: number");