diff --git a/src/harness/fourslash.ts b/src/harness/fourslash.ts
index 74ed3e307dd..d5c1e179c67 100644
--- a/src/harness/fourslash.ts
+++ b/src/harness/fourslash.ts
@@ -529,24 +529,35 @@ namespace FourSlash {
             this.verifyGoToDefinitionWorker(endMarker instanceof Array ? endMarker : [endMarker]);
         }
 
-        public verifyGoToDefinition(startsAndEnds: (string | string[])[]) {
-            if (startsAndEnds.length % 2) {
-                throw new Error("verify.goToDefinition needs an even number of arguments.");
+        public verifyGoToDefinition(arg0: any, endMarkerNames?: string | string[]) {
+            if (endMarkerNames) {
+                this.verifyGoToDefinitionPlain(arg0, endMarkerNames);
             }
-
-            for (let i = 0; i < startsAndEnds.length; i += 2) {
-                const start = startsAndEnds[i];
-                const end = startsAndEnds[i + 1];
-
-                if (start instanceof Array) {
-                    for (const s of start) {
-                        this.verifyGoToDefinitionSingle(s, end);
+            else if (arg0 instanceof Array) {
+                const pairs: [string | string[], string | string[]][] = arg0;
+                for (const [start, end] of pairs) {
+                    this.verifyGoToDefinitionPlain(start, end);
+                }
+            }
+            else {
+                const obj: { [startMarkerName: string]: string | string[] } = arg0;
+                for (const startMarkerName in obj) {
+                    if (ts.hasProperty(obj, startMarkerName)) {
+                        this.verifyGoToDefinitionPlain(startMarkerName, obj[startMarkerName]);
                     }
                 }
-                else {
-                    this.verifyGoToDefinitionSingle(start, end);
+            }
+        }
+
+        private verifyGoToDefinitionPlain(startMarkerNames: string | string[], endMarkerNames: string | string[]) {
+            if (startMarkerNames instanceof Array) {
+                for (const start of startMarkerNames) {
+                    this.verifyGoToDefinitionSingle(start, endMarkerNames);
                 }
             }
+            else {
+                this.verifyGoToDefinitionSingle(startMarkerNames, endMarkerNames);
+            }
         }
 
         public verifyGoToDefinitionForMarkers(markerNames: string[]) {
@@ -555,9 +566,9 @@ namespace FourSlash {
             }
         }
 
-        private verifyGoToDefinitionSingle(start: string, end: string | string[]) {
-            this.goToMarker(start);
-            this.verifyGoToDefinitionWorker(end instanceof Array ? end : [end]);
+        private verifyGoToDefinitionSingle(startMarkerName: string, endMarkerNames: string | string[]) {
+            this.goToMarker(startMarkerName);
+            this.verifyGoToDefinitionWorker(endMarkerNames instanceof Array ? endMarkerNames : [endMarkerNames]);
         }
 
         private verifyGoToDefinitionWorker(endMarkers: string[]) {
@@ -2947,8 +2958,11 @@ namespace FourSlashInterface {
             this.state.verifyGoToDefinitionIs(endMarkers);
         }
 
-        public goToDefinition(...startsAndEnds: (string | string[])[]) {
-            this.state.verifyGoToDefinition(startsAndEnds);
+        public goToDefinition(startMarkerName: string | string[], endMarkerName: string | string[]): void;
+        public goToDefinition(startsAndEnds: [string | string[], string | string[]][]): void;
+        public goToDefinition(startsAndEnds: { [startMarkerName: string]: string | string[] }): void;
+        public goToDefinition(arg0: any, endMarkerName?: string | string[]) {
+            this.state.verifyGoToDefinition(arg0, endMarkerName);
         }
 
         public goToDefinitionForMarkers(...markerNames: string[]) {
diff --git a/tests/cases/fourslash/ambientShorthandGotoDefinition.ts b/tests/cases/fourslash/ambientShorthandGotoDefinition.ts
index bf109ce8ef4..f7fcbe9f053 100644
--- a/tests/cases/fourslash/ambientShorthandGotoDefinition.ts
+++ b/tests/cases/fourslash/ambientShorthandGotoDefinition.ts
@@ -12,9 +12,10 @@
 
 goTo.marker("useFoo");
 verify.quickInfoIs("import foo");
-verify.goToDefinition(
-    "useFoo", "importFoo",
-    "importFoo", "module");
+verify.goToDefinition({
+    useFoo: "importFoo",
+    importFoo: "module"
+});
 
 goTo.marker("useBar");
 verify.quickInfoIs("import bar");
@@ -22,12 +23,14 @@ verify.goToDefinition("useBar", "module");
 
 goTo.marker("useBaz");
 verify.quickInfoIs("import baz");
-verify.goToDefinition(
-    "useBaz", "importBaz",
-    "idBaz", "module");
+verify.goToDefinition({
+    useBaz: "importBaz",
+    idBaz: "module"
+});
 
 goTo.marker("useBang");
 verify.quickInfoIs("import bang = require(\"jquery\")");
-verify.goToDefinition(
-    "useBang", "importBang",
-    "idBang", "module");
+verify.goToDefinition({
+    useBang: "importBang",
+    idBang: "module"
+});
diff --git a/tests/cases/fourslash/fourslash.ts b/tests/cases/fourslash/fourslash.ts
index 834bf1fd2da..1c400ff5f97 100644
--- a/tests/cases/fourslash/fourslash.ts
+++ b/tests/cases/fourslash/fourslash.ts
@@ -156,9 +156,12 @@ declare namespace FourSlashInterface {
          * `verify.goToDefinition("a", "b");` verifies that go-to-definition at marker "a" takes you to marker "b".
          * `verify.goToDefinition(["a", "aa"], "b");` verifies that markers "a" and "aa" have the same definition "b".
          * `verify.goToDefinition("a", ["b", "bb"]);` verifies that "a" has multiple definitions available.
-         * Finally, `verify.goToDefinition("a", "b", "c", "d");` is just `verify.goToDefinition("a", "b"); verify.goToDefinition("c", "d");`.
          */
-        goToDefinition(...startsAndEnds: (string | string[])[]): void;
+        goToDefinition(startMarkerNames: string | string[], endMarkerNames: string | string[]): void;
+        /** Performs `goToDefinition` for each pair. */
+        goToDefinition(startsAndEnds: [string | string[], string | string[]][]): void;
+        /** Performs `goToDefinition` on each key and value. */
+        goToDefinition(startsAndEnds: { [startMarkerName: string]: string | string[] }): void;
         /** Verifies goToDefinition for each `${markerName}Reference` -> `${markerName}Definition` */
         goToDefinitionForMarkers(...markerNames: string[]): void;
         verifyGetEmitOutputForCurrentFile(expected: string): void;
diff --git a/tests/cases/fourslash/goToDeclarationDecoratorOverloads.ts b/tests/cases/fourslash/goToDeclarationDecoratorOverloads.ts
index ae9d5fa86b6..c107f7f6803 100644
--- a/tests/cases/fourslash/goToDeclarationDecoratorOverloads.ts
+++ b/tests/cases/fourslash/goToDeclarationDecoratorOverloads.ts
@@ -13,6 +13,7 @@
 ////    @/*useDecSymbol*/dec [s]() {}
 ////}
 
-verify.goToDefinition(
-    "useDecString", "defDecString",
-    "useDecSymbol", "defDecSymbol");
+verify.goToDefinition({
+    useDecString: "defDecString",
+    useDecSymbol: "defDecSymbol"
+});
diff --git a/tests/cases/fourslash/goToDefinitionAlias.ts b/tests/cases/fourslash/goToDefinitionAlias.ts
index 2e73d834d42..23cf849f101 100644
--- a/tests/cases/fourslash/goToDefinitionAlias.ts
+++ b/tests/cases/fourslash/goToDefinitionAlias.ts
@@ -23,6 +23,7 @@
 ////    x;
 ////}
 
-verify.goToDefinition(
-    ["alias1Type", "alias1Value"], "alias1Definition",
-    ["alias2Type", "alias2Value"], "alias2Definition");
+verify.goToDefinition([
+    [["alias1Type", "alias1Value"], "alias1Definition"],
+    [["alias2Type", "alias2Value"], "alias2Definition"]
+]);
diff --git a/tests/cases/fourslash/goToDefinitionConstructorOverloads.ts b/tests/cases/fourslash/goToDefinitionConstructorOverloads.ts
index 2899ad76dbc..a3a5e3286b2 100644
--- a/tests/cases/fourslash/goToDefinitionConstructorOverloads.ts
+++ b/tests/cases/fourslash/goToDefinitionConstructorOverloads.ts
@@ -9,7 +9,8 @@
 ////var constructorOverload = new /*constructorOverloadReference1*/ConstructorOverload();
 ////var constructorOverload = new /*constructorOverloadReference2*/ConstructorOverload("foo");
 
-verify.goToDefinition(
-    "constructorOverloadReference1", "constructorOverload1",
-    "constructorOverloadReference2", "constructorOverload2",
-    "constructorOverload1", "constructorDefinition");
+verify.goToDefinition({
+    constructorOverloadReference1: "constructorOverload1",
+    constructorOverloadReference2: "constructorOverload2",
+    constructorOverload1: "constructorDefinition"
+});
diff --git a/tests/cases/fourslash/goToDefinitionDecorator.ts b/tests/cases/fourslash/goToDefinitionDecorator.ts
index 6511e87a57e..c86b02ab820 100644
--- a/tests/cases/fourslash/goToDefinitionDecorator.ts
+++ b/tests/cases/fourslash/goToDefinitionDecorator.ts
@@ -16,6 +16,7 @@
 ////    return target => target;
 ////}
 
-verify.goToDefinition(
-    "decoratorUse", "decoratorDefinition",
-    "decoratorFactoryUse", "decoratorFactoryDefinition");
+verify.goToDefinition({
+    decoratorUse: "decoratorDefinition",
+    decoratorFactoryUse: "decoratorFactoryDefinition"
+});
diff --git a/tests/cases/fourslash/goToDefinitionFunctionOverloads.ts b/tests/cases/fourslash/goToDefinitionFunctionOverloads.ts
index 012689c984d..e30150a1f45 100644
--- a/tests/cases/fourslash/goToDefinitionFunctionOverloads.ts
+++ b/tests/cases/fourslash/goToDefinitionFunctionOverloads.ts
@@ -8,8 +8,9 @@
 /////*functionOverloadReference2*/functionOverload("123");
 /////*brokenOverload*/functionOverload({});
 
-verify.goToDefinition(
-    "functionOverloadReference1", "functionOverload1",
-    "functionOverloadReference2", "functionOverload2",
-    "brokenOverload", "functionOverload1",
-    "functionOverload", "functionOverloadDefinition");
+verify.goToDefinition({
+    functionOverloadReference1: "functionOverload1",
+    functionOverloadReference2: "functionOverload2",
+    brokenOverload: "functionOverload1",
+    functionOverload: "functionOverloadDefinition"
+});
diff --git a/tests/cases/fourslash/goToDefinitionFunctionOverloadsInClass.ts b/tests/cases/fourslash/goToDefinitionFunctionOverloadsInClass.ts
index bd8c0260622..3426a4d5e1e 100644
--- a/tests/cases/fourslash/goToDefinitionFunctionOverloadsInClass.ts
+++ b/tests/cases/fourslash/goToDefinitionFunctionOverloadsInClass.ts
@@ -11,6 +11,7 @@
 ////    constructor() { }
 ////}
 
-verify.goToDefinition(
-    "staticFunctionOverload", "staticFunctionOverloadDefinition",
-    "functionOverload", "functionOverloadDefinition");
+verify.goToDefinition({
+    staticFunctionOverload: "staticFunctionOverloadDefinition",
+    functionOverload: "functionOverloadDefinition"
+});
diff --git a/tests/cases/fourslash/goToDefinitionInMemberDeclaration.ts b/tests/cases/fourslash/goToDefinitionInMemberDeclaration.ts
index 307a6813e33..66719bb621b 100644
--- a/tests/cases/fourslash/goToDefinitionInMemberDeclaration.ts
+++ b/tests/cases/fourslash/goToDefinitionInMemberDeclaration.ts
@@ -19,8 +19,9 @@
 ////    }
 ////}
 
-verify.goToDefinition(
-    ["interfaceReference", "interfaceReferenceInList", "interfaceReferenceInConstructor"], "interfaceDefinition",
-    ["classReference", "classReferenceInInitializer"], "classDefinition",
-    ["enumReference", "enumReferenceInInitializer"], "enumDefinition",
-    "selfReference", "selfDefinition");
+verify.goToDefinition([
+    [["interfaceReference", "interfaceReferenceInList", "interfaceReferenceInConstructor"], "interfaceDefinition"],
+    [["classReference", "classReferenceInInitializer"], "classDefinition"],
+    [["enumReference", "enumReferenceInInitializer"], "enumDefinition"],
+    ["selfReference", "selfDefinition"]
+]);
diff --git a/tests/cases/fourslash/goToDefinitionLabels.ts b/tests/cases/fourslash/goToDefinitionLabels.ts
index 212c313e023..5cbf3ac8f2f 100644
--- a/tests/cases/fourslash/goToDefinitionLabels.ts
+++ b/tests/cases/fourslash/goToDefinitionLabels.ts
@@ -9,10 +9,11 @@
 ////    }
 ////}
 
-verify.goToDefinition(
-    "1", "label1Definition",
-    "2", "label2Definition",
+verify.goToDefinition({
+    1: "label1Definition",
+    2: "label2Definition",
     // labels accross function boundaries
-    "3", "label1Definition",
+    3: "label1Definition",
     // undefined label
-    "4", []);
+    4: []
+});
diff --git a/tests/cases/fourslash/goToDefinitionMethodOverloads.ts b/tests/cases/fourslash/goToDefinitionMethodOverloads.ts
index 4b326b38a6c..199b5aee226 100644
--- a/tests/cases/fourslash/goToDefinitionMethodOverloads.ts
+++ b/tests/cases/fourslash/goToDefinitionMethodOverloads.ts
@@ -18,10 +18,11 @@
 ////methodOverload./*instanceMethodReference1*/method();
 ////methodOverload./*instanceMethodReference2*/method("456");
 
-verify.goToDefinition(
-    "staticMethodReference1", "staticMethodOverload1",
-    "staticMethodReference2", "staticMethodOverload2",
-    "instanceMethodReference1", "instanceMethodOverload1",
-    "instanceMethodReference2", "instanceMethodOverload2",
-    "staticMethodOverload1Name", "staticMethodDefinition",
-    "instanceMethodOverload1Name", "instanceMethodDefinition");
+verify.goToDefinition({
+    staticMethodReference1: "staticMethodOverload1",
+    staticMethodReference2: "staticMethodOverload2",
+    instanceMethodReference1: "instanceMethodOverload1",
+    instanceMethodReference2: "instanceMethodOverload2",
+    staticMethodOverload1Name: "staticMethodDefinition",
+    instanceMethodOverload1Name: "instanceMethodDefinition"
+});
diff --git a/tests/cases/fourslash/goToDefinitionShorthandProperty01.ts b/tests/cases/fourslash/goToDefinitionShorthandProperty01.ts
index 54ebceec007..4107049286c 100644
--- a/tests/cases/fourslash/goToDefinitionShorthandProperty01.ts
+++ b/tests/cases/fourslash/goToDefinitionShorthandProperty01.ts
@@ -7,8 +7,9 @@
 //// obj./*valueReference1*/name;
 //// obj./*valueReference2*/id;
 
-verify.goToDefinition(
-    "valueDefinition1", "valueDeclaration1",
-    "valueDefinition2", ["valueDeclaration2", "valueDeclaration3"],
-    "valueReference1", "valueDefinition1",
-    "valueReference2", "valueDefinition2");
+verify.goToDefinition({
+    valueDefinition1: "valueDeclaration1",
+    valueDefinition2: ["valueDeclaration2", "valueDeclaration3"],
+    valueReference1: "valueDefinition1",
+    valueReference2: "valueDefinition2"
+});
diff --git a/tests/cases/fourslash/goToDefinitionShorthandProperty03.ts b/tests/cases/fourslash/goToDefinitionShorthandProperty03.ts
index 7a0a93934e3..42a9ee0a4d6 100644
--- a/tests/cases/fourslash/goToDefinitionShorthandProperty03.ts
+++ b/tests/cases/fourslash/goToDefinitionShorthandProperty03.ts
@@ -7,6 +7,7 @@
 ////    /*letProp*/y
 ////}
 
-verify.goToDefinition(
-    "varProp", "varDef",
-    "letProp", "letDef");
+verify.goToDefinition({
+    varProp: "varDef",
+    letProp: "letDef"
+});
diff --git a/tests/cases/fourslash/goToDefinitionSourceUnit.ts b/tests/cases/fourslash/goToDefinitionSourceUnit.ts
index b96a992aac1..e66b5ef7960 100644
--- a/tests/cases/fourslash/goToDefinitionSourceUnit.ts
+++ b/tests/cases/fourslash/goToDefinitionSourceUnit.ts
@@ -16,6 +16,7 @@
 // @Filename: b.ts
 /////*fileB*/
 
-verify.goToDefinition(
-    "unknownFile", [],
-    "knownFile", "fileB");
+verify.goToDefinition({
+    unknownFile: [],
+    knownFile: "fileB"
+});
diff --git a/tests/cases/fourslash/goToDefinitionTaggedTemplateOverloads.ts b/tests/cases/fourslash/goToDefinitionTaggedTemplateOverloads.ts
index a7725bbcda7..fad27cabbb6 100644
--- a/tests/cases/fourslash/goToDefinitionTaggedTemplateOverloads.ts
+++ b/tests/cases/fourslash/goToDefinitionTaggedTemplateOverloads.ts
@@ -7,6 +7,7 @@
 /////*useFNumber*/f`${0}`;
 /////*useFBool*/f`${false}`;
 
-verify.goToDefinition(
-    "useFNumber", "defFNumber",
-    "useFBool", "defFBool");
+verify.goToDefinition({
+    useFNumber: "defFNumber",
+    useFBool: "defFBool"
+});
diff --git a/tests/cases/fourslash/goToDefinitionThis.ts b/tests/cases/fourslash/goToDefinitionThis.ts
index 6f03cb77284..5cb94ef35c7 100644
--- a/tests/cases/fourslash/goToDefinitionThis.ts
+++ b/tests/cases/fourslash/goToDefinitionThis.ts
@@ -8,7 +8,8 @@
 ////    get self(/*getterDecl*/this: number) { return /*getterUse*/this; }
 ////}
 
-verify.goToDefinition(
-    "fnUse", "fnDecl",
-    "clsUse", "cls",
-    "getterUse", "getterDecl");
+verify.goToDefinition({
+    "fnUse": "fnDecl",
+    "clsUse": "cls",
+    "getterUse": "getterDecl"
+});
diff --git a/tests/cases/fourslash/goToDefinitionTypePredicate.ts b/tests/cases/fourslash/goToDefinitionTypePredicate.ts
index 0fb211c5057..dd2b69f37e8 100644
--- a/tests/cases/fourslash/goToDefinitionTypePredicate.ts
+++ b/tests/cases/fourslash/goToDefinitionTypePredicate.ts
@@ -5,6 +5,7 @@
 ////     return typeof parameter === "string";
 //// }
 
-verify.goToDefinition(
-    "parameterName", "parameterDeclaration",
-    "typeReference", "classDeclaration");
+verify.goToDefinition({
+    parameterName: "parameterDeclaration",
+    typeReference: "classDeclaration"
+});
diff --git a/tests/cases/fourslash/goToDefinition_super.ts b/tests/cases/fourslash/goToDefinition_super.ts
index 09996fcc2e9..7a7008ba07f 100644
--- a/tests/cases/fourslash/goToDefinition_super.ts
+++ b/tests/cases/fourslash/goToDefinition_super.ts
@@ -20,9 +20,10 @@
 ////}
 
 
-verify.goToDefinition(
+verify.goToDefinition({
     // Super in call position goes to constructor.
-    "super", "ctr",
+    super: "ctr",
     // Super in any other position goes to the superclass.
-    "superExpression", "B",
-    "superBroken", []);
+    superExpression: "B",
+    superBroken: []
+});
diff --git a/tests/cases/fourslash/goToModuleAliasDefinition.ts b/tests/cases/fourslash/goToModuleAliasDefinition.ts
index 96e6f5b0c40..cdec82fd0d4 100644
--- a/tests/cases/fourslash/goToModuleAliasDefinition.ts
+++ b/tests/cases/fourslash/goToModuleAliasDefinition.ts
@@ -9,4 +9,3 @@
 
 // Won't-fixed: Should go to '2' instead
 verify.goToDefinition("1", "3");
-goTo.marker('1');
diff --git a/tests/cases/fourslash/javaScriptClass3.ts b/tests/cases/fourslash/javaScriptClass3.ts
index 2a504d49036..41ce79b35eb 100644
--- a/tests/cases/fourslash/javaScriptClass3.ts
+++ b/tests/cases/fourslash/javaScriptClass3.ts
@@ -15,6 +15,7 @@
 //// x.alpha/*src1*/;
 //// x.beta/*src2*/;
 
-verify.goToDefinition(
-    "src1", "dst1",
-    "src2", "dst2");
+verify.goToDefinition({
+    src1: "dst1",
+    src2: "dst2"
+});
diff --git a/tests/cases/fourslash/server/jsdocTypedefTagGoToDefinition.ts b/tests/cases/fourslash/server/jsdocTypedefTagGoToDefinition.ts
index 1074e206559..2183c8d5471 100644
--- a/tests/cases/fourslash/server/jsdocTypedefTagGoToDefinition.ts
+++ b/tests/cases/fourslash/server/jsdocTypedefTagGoToDefinition.ts
@@ -19,6 +19,7 @@
 //// /** @type {Animal} */
 //// var animal; animal.animalName/*4*/
 
-verify.goToDefinition(
-    "3", "1",
-    "4", "2");
+verify.goToDefinition({
+    3: "1",
+    4: "2"
+});
diff --git a/tests/cases/fourslash/tsxGoToDefinitionClasses.ts b/tests/cases/fourslash/tsxGoToDefinitionClasses.ts
index b6ee9ef484f..9c54834534d 100644
--- a/tests/cases/fourslash/tsxGoToDefinitionClasses.ts
+++ b/tests/cases/fourslash/tsxGoToDefinitionClasses.ts
@@ -14,6 +14,7 @@
 //// var x = <My/*c*/Class />;
 //// var y = <MyClass f/*p*/oo= 'hello' />;
 
-verify.goToDefinition(
-    "c", "ct",
-    "p", "pt");
+verify.goToDefinition({
+    c: "ct",
+    p: "pt"
+});
diff --git a/tests/cases/fourslash/tsxGoToDefinitionIntrinsics.ts b/tests/cases/fourslash/tsxGoToDefinitionIntrinsics.ts
index e268de2b026..a82e813baa7 100644
--- a/tests/cases/fourslash/tsxGoToDefinitionIntrinsics.ts
+++ b/tests/cases/fourslash/tsxGoToDefinitionIntrinsics.ts
@@ -15,7 +15,8 @@
 //// var y = <s/*ss*/pan />;
 //// var z = <div na/*ps*/me='hello' />;
 
-verify.goToDefinition(
-    "ds", "dt",
-    "ss", "st",
-    "ps", "pt");
+verify.goToDefinition({
+    ds: "dt",
+    ss: "st",
+    ps: "pt"
+});