diff --git a/src/compiler/builder.ts b/src/compiler/builder.ts
index 62dd670fbc5..06615b3a97f 100644
--- a/src/compiler/builder.ts
+++ b/src/compiler/builder.ts
@@ -78,7 +78,8 @@ namespace ts {
         if (useOldState) {
             // Verify the sanity of old state
             if (!oldState!.currentChangedFilePath) {
-                Debug.assert(!oldState!.affectedFiles && (!oldState!.currentAffectedFilesSignatures || !oldState!.currentAffectedFilesSignatures!.size), "Cannot reuse if only few affected files of currentChangedFile were iterated");
+                const affectedSignatures = oldState!.currentAffectedFilesSignatures;
+                Debug.assert(!oldState!.affectedFiles && (!affectedSignatures || !affectedSignatures.size), "Cannot reuse if only few affected files of currentChangedFile were iterated");
             }
             if (canCopySemanticDiagnostics) {
                 Debug.assert(!forEachKey(oldState!.changedFilesSet, path => oldState!.semanticDiagnosticsPerFile!.has(path)), "Semantic diagnostics shouldnt be available for changed files");
diff --git a/src/compiler/diagnosticMessages.json b/src/compiler/diagnosticMessages.json
index 9a918507dc4..5bcaf448599 100644
--- a/src/compiler/diagnosticMessages.json
+++ b/src/compiler/diagnosticMessages.json
@@ -4811,5 +4811,9 @@
     "Add names to all parameters without names": {
         "category": "Message",
         "code": 95073
+    },
+    "Enable the 'experimentalDecorators' option in your configuration file": {
+        "category": "Message",
+        "code": 95074
     }
 }
diff --git a/src/compiler/emitter.ts b/src/compiler/emitter.ts
index 0afd8ee761c..395f6448890 100644
--- a/src/compiler/emitter.ts
+++ b/src/compiler/emitter.ts
@@ -2561,6 +2561,7 @@ namespace ts {
         function emitJsxSelfClosingElement(node: JsxSelfClosingElement) {
             writePunctuation("<");
             emitJsxTagName(node.tagName);
+            emitTypeArguments(node, node.typeArguments);
             writeSpace();
             emit(node.attributes);
             writePunctuation("/>");
@@ -2577,6 +2578,7 @@ namespace ts {
 
             if (isJsxOpeningElement(node)) {
                 emitJsxTagName(node.tagName);
+                emitTypeArguments(node, node.typeArguments);
                 if (node.attributes.properties && node.attributes.properties.length > 0) {
                     writeSpace();
                 }
diff --git a/src/compiler/parser.ts b/src/compiler/parser.ts
index f976f77ea98..53e45505014 100644
--- a/src/compiler/parser.ts
+++ b/src/compiler/parser.ts
@@ -7774,17 +7774,18 @@ namespace ts {
                     const libReferenceDirectives = context.libReferenceDirectives;
                     forEach(toArray(entryOrList), (arg: PragmaPseudoMap["reference"]) => {
                         // TODO: GH#18217
+                        const { types, lib, path } = arg!.arguments;
                         if (arg!.arguments["no-default-lib"]) {
                             context.hasNoDefaultLib = true;
                         }
-                        else if (arg!.arguments.types) {
-                            typeReferenceDirectives.push({ pos: arg!.arguments.types!.pos, end: arg!.arguments.types!.end, fileName: arg!.arguments.types!.value });
+                        else if (types) {
+                            typeReferenceDirectives.push({ pos: types.pos, end: types.end, fileName: types.value });
                         }
-                        else if (arg!.arguments.lib) {
-                            libReferenceDirectives.push({ pos: arg!.arguments.lib!.pos, end: arg!.arguments.lib!.end, fileName: arg!.arguments.lib!.value });
+                        else if (lib) {
+                            libReferenceDirectives.push({ pos: lib.pos, end: lib.end, fileName: lib.value });
                         }
-                        else if (arg!.arguments.path) {
-                            referencedFiles.push({ pos: arg!.arguments.path!.pos, end: arg!.arguments.path!.end, fileName: arg!.arguments.path!.value });
+                        else if (path) {
+                            referencedFiles.push({ pos: path.pos, end: path.end, fileName: path.value });
                         }
                         else {
                             reportDiagnostic(arg!.range.pos, arg!.range.end - arg!.range.pos, Diagnostics.Invalid_reference_directive_syntax);
diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index 080b17b8cbe..271bdab976e 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -2227,8 +2227,9 @@ namespace ts {
                         processReferencedFiles(file, isDefaultLib);
                         processTypeReferenceDirectives(file);
                     }
-
-                    processLibReferenceDirectives(file);
+                    if (!options.noLib) {
+                        processLibReferenceDirectives(file);
+                    }
 
                     modulesWithElidedImports.set(file.path, false);
                     processImportedModules(file);
@@ -2315,8 +2316,10 @@ namespace ts {
                     processReferencedFiles(file, isDefaultLib);
                     processTypeReferenceDirectives(file);
                 }
+                if (!options.noLib) {
+                    processLibReferenceDirectives(file);
+                }
 
-                processLibReferenceDirectives(file);
 
                 // always process imported modules to record module name resolutions
                 processImportedModules(file);
diff --git a/src/harness/compiler.ts b/src/harness/compiler.ts
index 532a2d65578..70bda90ef32 100644
--- a/src/harness/compiler.ts
+++ b/src/harness/compiler.ts
@@ -183,8 +183,9 @@ namespace compiler {
         }
 
         public getSourceMapRecord(): string | undefined {
-            if (this.result!.sourceMaps && this.result!.sourceMaps!.length > 0) {
-                return Harness.SourceMapRecorder.getSourceMapRecord(this.result!.sourceMaps!, this.program!, Array.from(this.js.values()).filter(d => !ts.fileExtensionIs(d.file, ts.Extension.Json)), Array.from(this.dts.values()));
+            const maps = this.result!.sourceMaps;
+            if (maps && maps.length > 0) {
+                return Harness.SourceMapRecorder.getSourceMapRecord(maps, this.program!, Array.from(this.js.values()).filter(d => !ts.fileExtensionIs(d.file, ts.Extension.Json)), Array.from(this.dts.values()));
             }
         }
 
diff --git a/src/services/codefixes/fixCannotFindModule.ts b/src/services/codefixes/fixCannotFindModule.ts
index 1c7070c74bf..1baaa9714f2 100644
--- a/src/services/codefixes/fixCannotFindModule.ts
+++ b/src/services/codefixes/fixCannotFindModule.ts
@@ -74,7 +74,7 @@ namespace ts.codefix {
         const tsconfigObjectLiteral = getTsConfigObjectLiteralExpression(configFile);
         if (!tsconfigObjectLiteral) return undefined;
 
-        const compilerOptionsProperty = findProperty(tsconfigObjectLiteral, "compilerOptions");
+        const compilerOptionsProperty = findJsonProperty(tsconfigObjectLiteral, "compilerOptions");
         if (!compilerOptionsProperty) {
             const newCompilerOptions = createObjectLiteral([makeDefaultBaseUrl(), makeDefaultPaths()]);
             changes.insertNodeAtObjectStart(configFile, tsconfigObjectLiteral, createJsonPropertyAssignment("compilerOptions", newCompilerOptions));
@@ -94,7 +94,7 @@ namespace ts.codefix {
         return createJsonPropertyAssignment("baseUrl", createStringLiteral(defaultBaseUrl));
     }
     function getOrAddBaseUrl(changes: textChanges.ChangeTracker, tsconfig: TsConfigSourceFile, compilerOptions: ObjectLiteralExpression): string {
-        const baseUrlProp = findProperty(compilerOptions, "baseUrl");
+        const baseUrlProp = findJsonProperty(compilerOptions, "baseUrl");
         if (baseUrlProp) {
             return isStringLiteral(baseUrlProp.initializer) ? baseUrlProp.initializer.text : defaultBaseUrl;
         }
@@ -112,7 +112,7 @@ namespace ts.codefix {
         return createJsonPropertyAssignment("paths", createObjectLiteral([makeDefaultPathMapping()]));
     }
     function getOrAddPathMapping(changes: textChanges.ChangeTracker, tsconfig: TsConfigSourceFile, compilerOptions: ObjectLiteralExpression) {
-        const paths = findProperty(compilerOptions, "paths");
+        const paths = findJsonProperty(compilerOptions, "paths");
         if (!paths || !isObjectLiteralExpression(paths.initializer)) {
             changes.insertNodeAtObjectStart(tsconfig, compilerOptions, makeDefaultPaths());
             return defaultTypesDirectoryName;
@@ -129,14 +129,6 @@ namespace ts.codefix {
         return defaultTypesDirectoryName;
     }
 
-    function createJsonPropertyAssignment(name: string, initializer: Expression) {
-        return createPropertyAssignment(createStringLiteral(name), initializer);
-    }
-
-    function findProperty(obj: ObjectLiteralExpression, name: string): PropertyAssignment | undefined {
-        return find(obj.properties, (p): p is PropertyAssignment => isPropertyAssignment(p) && !!p.name && isStringLiteral(p.name) && p.name.text === name);
-    }
-
     function getInstallCommand(fileName: string, packageName: string): InstallPackageAction {
         return { type: "install package", file: fileName, packageName };
     }
diff --git a/src/services/codefixes/fixEnableExperimentalDecorators.ts b/src/services/codefixes/fixEnableExperimentalDecorators.ts
new file mode 100644
index 00000000000..8aeefe48a47
--- /dev/null
+++ b/src/services/codefixes/fixEnableExperimentalDecorators.ts
@@ -0,0 +1,24 @@
+/* @internal */
+namespace ts.codefix {
+    const fixId = "enableExperimentalDecorators";
+    const errorCodes = [
+        Diagnostics.Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning.code
+    ];
+    registerCodeFix({
+        errorCodes,
+        getCodeActions: (context) => {
+            const { configFile } = context.program.getCompilerOptions();
+            if (configFile === undefined) {
+                return undefined;
+            }
+
+            const changes = textChanges.ChangeTracker.with(context, changeTracker => makeChange(changeTracker, configFile));
+            return [createCodeFixActionNoFixId(fixId, changes, Diagnostics.Enable_the_experimentalDecorators_option_in_your_configuration_file)];
+        },
+        fixIds: [fixId],
+    });
+
+    function makeChange(changeTracker: textChanges.ChangeTracker, configFile: TsConfigSourceFile) {
+        setJsonCompilerOptionValue(changeTracker, configFile, "experimentalDecorators", createTrue());
+    }
+}
diff --git a/src/services/codefixes/helpers.ts b/src/services/codefixes/helpers.ts
index 461771c0b5e..66488d5d697 100644
--- a/src/services/codefixes/helpers.ts
+++ b/src/services/codefixes/helpers.ts
@@ -249,4 +249,46 @@ namespace ts.codefix {
         }
         return undefined;
     }
+
+    export function setJsonCompilerOptionValue(
+        changeTracker: textChanges.ChangeTracker,
+        configFile: TsConfigSourceFile,
+        optionName: string,
+        optionValue: Expression,
+    ) {
+        const tsconfigObjectLiteral = getTsConfigObjectLiteralExpression(configFile);
+        if (!tsconfigObjectLiteral) return undefined;
+
+        const compilerOptionsProperty = findJsonProperty(tsconfigObjectLiteral, "compilerOptions");
+        if (compilerOptionsProperty === undefined) {
+            changeTracker.insertNodeAtObjectStart(configFile, tsconfigObjectLiteral, createJsonPropertyAssignment(
+                "compilerOptions",
+                createObjectLiteral([
+                    createJsonPropertyAssignment(optionName, optionValue),
+                ])));
+            return;
+        }
+
+        const compilerOptions = compilerOptionsProperty.initializer;
+        if (!isObjectLiteralExpression(compilerOptions)) {
+            return;
+        }
+
+        const optionProperty = findJsonProperty(compilerOptions, optionName);
+
+        if (optionProperty === undefined) {
+            changeTracker.insertNodeAtObjectStart(configFile, compilerOptions, createJsonPropertyAssignment(optionName, optionValue));
+        }
+        else {
+            changeTracker.replaceNode(configFile, optionProperty.initializer, optionValue);
+        }
+    }
+
+    export function createJsonPropertyAssignment(name: string, initializer: Expression) {
+        return createPropertyAssignment(createStringLiteral(name), initializer);
+    }
+
+    export function findJsonProperty(obj: ObjectLiteralExpression, name: string): PropertyAssignment | undefined {
+        return find(obj.properties, (p): p is PropertyAssignment => isPropertyAssignment(p) && !!p.name && isStringLiteral(p.name) && p.name.text === name);
+    }
 }
diff --git a/src/services/tsconfig.json b/src/services/tsconfig.json
index 15044416f84..21be663055a 100644
--- a/src/services/tsconfig.json
+++ b/src/services/tsconfig.json
@@ -61,6 +61,7 @@
         "codefixes/fixClassDoesntImplementInheritedAbstractMember.ts",
         "codefixes/fixClassSuperMustPrecedeThisAccess.ts",
         "codefixes/fixConstructorForDerivedNeedSuperCall.ts",
+        "codefixes/fixEnableExperimentalDecorators.ts",
         "codefixes/fixExtendsInterfaceBecomesImplements.ts",
         "codefixes/fixForgottenThisPropertyAccess.ts",
         "codefixes/fixUnusedIdentifier.ts",
diff --git a/tests/baselines/reference/libReferenceNoLib.js b/tests/baselines/reference/libReferenceNoLib.js
new file mode 100644
index 00000000000..21d1cbbe177
--- /dev/null
+++ b/tests/baselines/reference/libReferenceNoLib.js
@@ -0,0 +1,51 @@
+//// [tests/cases/conformance/declarationEmit/libReferenceNoLib.ts] ////
+
+//// [fakelib.ts]
+// Test that passing noLib disables <reference lib> resolution.
+
+interface Object { }
+interface Array<T> { }
+interface String { }
+interface Boolean { }
+interface Number { }
+interface Function { }
+interface RegExp { }
+interface IArguments { }
+
+
+//// [file1.ts]
+/// <reference lib="dom" />
+export declare interface HTMLElement { field: string; }
+export const elem: HTMLElement = { field: 'a' };
+
+
+//// [fakelib.js]
+// Test that passing noLib disables <reference lib> resolution.
+//// [file1.js]
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.elem = { field: 'a' };
+
+
+//// [fakelib.d.ts]
+interface Object {
+}
+interface Array<T> {
+}
+interface String {
+}
+interface Boolean {
+}
+interface Number {
+}
+interface Function {
+}
+interface RegExp {
+}
+interface IArguments {
+}
+//// [file1.d.ts]
+export declare interface HTMLElement {
+    field: string;
+}
+export declare const elem: HTMLElement;
diff --git a/tests/baselines/reference/libReferenceNoLib.symbols b/tests/baselines/reference/libReferenceNoLib.symbols
new file mode 100644
index 00000000000..5f180fd1eed
--- /dev/null
+++ b/tests/baselines/reference/libReferenceNoLib.symbols
@@ -0,0 +1,40 @@
+=== tests/cases/conformance/declarationEmit/fakelib.ts ===
+// Test that passing noLib disables <reference lib> resolution.
+
+interface Object { }
+>Object : Symbol(Object, Decl(fakelib.ts, 0, 0))
+
+interface Array<T> { }
+>Array : Symbol(Array, Decl(fakelib.ts, 2, 20))
+>T : Symbol(T, Decl(fakelib.ts, 3, 16))
+
+interface String { }
+>String : Symbol(String, Decl(fakelib.ts, 3, 22))
+
+interface Boolean { }
+>Boolean : Symbol(Boolean, Decl(fakelib.ts, 4, 20))
+
+interface Number { }
+>Number : Symbol(Number, Decl(fakelib.ts, 5, 21))
+
+interface Function { }
+>Function : Symbol(Function, Decl(fakelib.ts, 6, 20))
+
+interface RegExp { }
+>RegExp : Symbol(RegExp, Decl(fakelib.ts, 7, 22))
+
+interface IArguments { }
+>IArguments : Symbol(IArguments, Decl(fakelib.ts, 8, 20))
+
+
+=== tests/cases/conformance/declarationEmit/file1.ts ===
+/// <reference lib="dom" />
+export declare interface HTMLElement { field: string; }
+>HTMLElement : Symbol(HTMLElement, Decl(file1.ts, 0, 0))
+>field : Symbol(HTMLElement.field, Decl(file1.ts, 1, 38))
+
+export const elem: HTMLElement = { field: 'a' };
+>elem : Symbol(elem, Decl(file1.ts, 2, 12))
+>HTMLElement : Symbol(HTMLElement, Decl(file1.ts, 0, 0))
+>field : Symbol(field, Decl(file1.ts, 2, 34))
+
diff --git a/tests/baselines/reference/libReferenceNoLib.types b/tests/baselines/reference/libReferenceNoLib.types
new file mode 100644
index 00000000000..0b2733c2265
--- /dev/null
+++ b/tests/baselines/reference/libReferenceNoLib.types
@@ -0,0 +1,24 @@
+=== tests/cases/conformance/declarationEmit/fakelib.ts ===
+// Test that passing noLib disables <reference lib> resolution.
+No type information for this code.
+No type information for this code.interface Object { }
+No type information for this code.interface Array<T> { }
+No type information for this code.interface String { }
+No type information for this code.interface Boolean { }
+No type information for this code.interface Number { }
+No type information for this code.interface Function { }
+No type information for this code.interface RegExp { }
+No type information for this code.interface IArguments { }
+No type information for this code.
+No type information for this code.
+No type information for this code.=== tests/cases/conformance/declarationEmit/file1.ts ===
+/// <reference lib="dom" />
+export declare interface HTMLElement { field: string; }
+>field : string
+
+export const elem: HTMLElement = { field: 'a' };
+>elem : HTMLElement
+>{ field: 'a' } : { field: string; }
+>field : string
+>'a' : "a"
+
diff --git a/tests/baselines/reference/libReferenceNoLibBundle.js b/tests/baselines/reference/libReferenceNoLibBundle.js
new file mode 100644
index 00000000000..a881f11a8a1
--- /dev/null
+++ b/tests/baselines/reference/libReferenceNoLibBundle.js
@@ -0,0 +1,53 @@
+//// [tests/cases/conformance/declarationEmit/libReferenceNoLibBundle.ts] ////
+
+//// [fakelib.ts]
+// Test that passing noLib disables <reference lib> resolution.
+
+interface Object { }
+interface Array<T> { }
+interface String { }
+interface Boolean { }
+interface Number { }
+interface Function { }
+interface RegExp { }
+interface IArguments { }
+
+
+//// [file1.ts]
+/// <reference lib="dom" />
+export declare interface HTMLElement { field: string; }
+export const elem: HTMLElement = { field: 'a' };
+
+
+//// [bundle.js]
+// Test that passing noLib disables <reference lib> resolution.
+define("file1", ["require", "exports"], function (require, exports) {
+    "use strict";
+    Object.defineProperty(exports, "__esModule", { value: true });
+    exports.elem = { field: 'a' };
+});
+
+
+//// [bundle.d.ts]
+interface Object {
+}
+interface Array<T> {
+}
+interface String {
+}
+interface Boolean {
+}
+interface Number {
+}
+interface Function {
+}
+interface RegExp {
+}
+interface IArguments {
+}
+declare module "file1" {
+    export interface HTMLElement {
+        field: string;
+    }
+    export const elem: HTMLElement;
+}
diff --git a/tests/baselines/reference/libReferenceNoLibBundle.symbols b/tests/baselines/reference/libReferenceNoLibBundle.symbols
new file mode 100644
index 00000000000..5f180fd1eed
--- /dev/null
+++ b/tests/baselines/reference/libReferenceNoLibBundle.symbols
@@ -0,0 +1,40 @@
+=== tests/cases/conformance/declarationEmit/fakelib.ts ===
+// Test that passing noLib disables <reference lib> resolution.
+
+interface Object { }
+>Object : Symbol(Object, Decl(fakelib.ts, 0, 0))
+
+interface Array<T> { }
+>Array : Symbol(Array, Decl(fakelib.ts, 2, 20))
+>T : Symbol(T, Decl(fakelib.ts, 3, 16))
+
+interface String { }
+>String : Symbol(String, Decl(fakelib.ts, 3, 22))
+
+interface Boolean { }
+>Boolean : Symbol(Boolean, Decl(fakelib.ts, 4, 20))
+
+interface Number { }
+>Number : Symbol(Number, Decl(fakelib.ts, 5, 21))
+
+interface Function { }
+>Function : Symbol(Function, Decl(fakelib.ts, 6, 20))
+
+interface RegExp { }
+>RegExp : Symbol(RegExp, Decl(fakelib.ts, 7, 22))
+
+interface IArguments { }
+>IArguments : Symbol(IArguments, Decl(fakelib.ts, 8, 20))
+
+
+=== tests/cases/conformance/declarationEmit/file1.ts ===
+/// <reference lib="dom" />
+export declare interface HTMLElement { field: string; }
+>HTMLElement : Symbol(HTMLElement, Decl(file1.ts, 0, 0))
+>field : Symbol(HTMLElement.field, Decl(file1.ts, 1, 38))
+
+export const elem: HTMLElement = { field: 'a' };
+>elem : Symbol(elem, Decl(file1.ts, 2, 12))
+>HTMLElement : Symbol(HTMLElement, Decl(file1.ts, 0, 0))
+>field : Symbol(field, Decl(file1.ts, 2, 34))
+
diff --git a/tests/baselines/reference/libReferenceNoLibBundle.types b/tests/baselines/reference/libReferenceNoLibBundle.types
new file mode 100644
index 00000000000..0b2733c2265
--- /dev/null
+++ b/tests/baselines/reference/libReferenceNoLibBundle.types
@@ -0,0 +1,24 @@
+=== tests/cases/conformance/declarationEmit/fakelib.ts ===
+// Test that passing noLib disables <reference lib> resolution.
+No type information for this code.
+No type information for this code.interface Object { }
+No type information for this code.interface Array<T> { }
+No type information for this code.interface String { }
+No type information for this code.interface Boolean { }
+No type information for this code.interface Number { }
+No type information for this code.interface Function { }
+No type information for this code.interface RegExp { }
+No type information for this code.interface IArguments { }
+No type information for this code.
+No type information for this code.
+No type information for this code.=== tests/cases/conformance/declarationEmit/file1.ts ===
+/// <reference lib="dom" />
+export declare interface HTMLElement { field: string; }
+>field : string
+
+export const elem: HTMLElement = { field: 'a' };
+>elem : HTMLElement
+>{ field: 'a' } : { field: string; }
+>field : string
+>'a' : "a"
+
diff --git a/tests/cases/conformance/declarationEmit/libReferenceNoLib.ts b/tests/cases/conformance/declarationEmit/libReferenceNoLib.ts
new file mode 100644
index 00000000000..d29da9a5bc5
--- /dev/null
+++ b/tests/cases/conformance/declarationEmit/libReferenceNoLib.ts
@@ -0,0 +1,21 @@
+// @target: esnext
+// @module: commonjs
+// @noLib: true
+// @declaration: true
+// Test that passing noLib disables <reference lib> resolution.
+
+// @filename: fakelib.ts
+interface Object { }
+interface Array<T> { }
+interface String { }
+interface Boolean { }
+interface Number { }
+interface Function { }
+interface RegExp { }
+interface IArguments { }
+
+
+// @filename: file1.ts
+/// <reference lib="dom" />
+export declare interface HTMLElement { field: string; }
+export const elem: HTMLElement = { field: 'a' };
diff --git a/tests/cases/conformance/declarationEmit/libReferenceNoLibBundle.ts b/tests/cases/conformance/declarationEmit/libReferenceNoLibBundle.ts
new file mode 100644
index 00000000000..18f0b5387c5
--- /dev/null
+++ b/tests/cases/conformance/declarationEmit/libReferenceNoLibBundle.ts
@@ -0,0 +1,23 @@
+// @target: esnext
+// @module: amd
+// @noLib: true
+// @declaration: true
+// @outFile: bundle.js
+
+// Test that passing noLib disables <reference lib> resolution.
+
+// @filename: fakelib.ts
+interface Object { }
+interface Array<T> { }
+interface String { }
+interface Boolean { }
+interface Number { }
+interface Function { }
+interface RegExp { }
+interface IArguments { }
+
+
+// @filename: file1.ts
+/// <reference lib="dom" />
+export declare interface HTMLElement { field: string; }
+export const elem: HTMLElement = { field: 'a' };
diff --git a/tests/cases/fourslash/codefixEnableExperimentalDecorators_blankCompilerOptions.ts b/tests/cases/fourslash/codefixEnableExperimentalDecorators_blankCompilerOptions.ts
new file mode 100644
index 00000000000..0e19b42d921
--- /dev/null
+++ b/tests/cases/fourslash/codefixEnableExperimentalDecorators_blankCompilerOptions.ts
@@ -0,0 +1,26 @@
+/// <reference path='fourslash.ts' />
+
+// @Filename: /dir/a.ts
+////declare const decorator: any;
+////class A {
+//// @decorator method() {};
+////};
+
+// @Filename: /dir/tsconfig.json
+////{
+////    "compilerOptions": {
+////    }
+////}
+
+goTo.file("/dir/a.ts");
+verify.codeFix({
+    description: "Enable the 'experimentalDecorators' option in your configuration file",
+    newFileContent: {
+        "/dir/tsconfig.json":
+`{
+    "compilerOptions": {
+        "experimentalDecorators": true,
+    }
+}`,
+    },
+});
diff --git a/tests/cases/fourslash/codefixEnableExperimentalDecorators_disabledInCompilerOptions.ts b/tests/cases/fourslash/codefixEnableExperimentalDecorators_disabledInCompilerOptions.ts
new file mode 100644
index 00000000000..056e7e15a48
--- /dev/null
+++ b/tests/cases/fourslash/codefixEnableExperimentalDecorators_disabledInCompilerOptions.ts
@@ -0,0 +1,27 @@
+/// <reference path='fourslash.ts' />
+
+// @Filename: /dir/a.ts
+////declare const decorator: any;
+////class A {
+//// @decorator method() {};
+////};
+
+// @Filename: /dir/tsconfig.json
+////{
+////    "compilerOptions": {
+////        "experimentalDecorators": false,
+////    }
+////}
+
+goTo.file("/dir/a.ts");
+verify.codeFix({
+    description: "Enable the 'experimentalDecorators' option in your configuration file",
+    newFileContent: {
+        "/dir/tsconfig.json":
+`{
+    "compilerOptions": {
+        "experimentalDecorators": true,
+    }
+}`,
+    },
+});
diff --git a/tests/cases/fourslash/codefixEnableExperimentalDecorators_missingCompilerOptions.ts b/tests/cases/fourslash/codefixEnableExperimentalDecorators_missingCompilerOptions.ts
new file mode 100644
index 00000000000..6d7006f3ce1
--- /dev/null
+++ b/tests/cases/fourslash/codefixEnableExperimentalDecorators_missingCompilerOptions.ts
@@ -0,0 +1,22 @@
+/// <reference path='fourslash.ts' />
+
+// @Filename: /dir/a.ts
+////declare const decorator: any;
+////class A {
+//// @decorator method() {};
+////};
+
+// @Filename: /dir/tsconfig.json
+////{
+////}
+
+goTo.file("/dir/a.ts");
+verify.codeFix({
+    description: "Enable the 'experimentalDecorators' option in your configuration file",
+    newFileContent: {
+        "/dir/tsconfig.json":
+`{
+    "compilerOptions": { "experimentalDecorators": true },
+}`,
+    },
+});
diff --git a/tests/cases/fourslash/codefixEnableExperimentalDecorators_noTsconfig.ts b/tests/cases/fourslash/codefixEnableExperimentalDecorators_noTsconfig.ts
new file mode 100644
index 00000000000..8430fd0734b
--- /dev/null
+++ b/tests/cases/fourslash/codefixEnableExperimentalDecorators_noTsconfig.ts
@@ -0,0 +1,10 @@
+/// <reference path='fourslash.ts' />
+
+// @Filename: /dir/a.ts
+////declare const decorator: any;
+////class A {
+//// @decorator method() {};
+////};
+
+goTo.file("/dir/a.ts");
+verify.not.codeFixAvailable();