diff --git a/src/compiler/commandLineParser.ts b/src/compiler/commandLineParser.ts
index 1698ee97a72..2c41ba05ffd 100644
--- a/src/compiler/commandLineParser.ts
+++ b/src/compiler/commandLineParser.ts
@@ -803,6 +803,8 @@ namespace ts {
         {
             name: "jsxImportSource",
             type: "string",
+            affectsSemanticDiagnostics: true,
+            affectsEmit: true,
             affectsModuleResolution: true,
             category: Diagnostics.Advanced_Options,
             description: Diagnostics.Specify_the_module_specifier_to_be_used_to_import_the_jsx_and_jsxs_factory_functions_from_eg_react
diff --git a/src/testRunner/unittests/tscWatch/incremental.ts b/src/testRunner/unittests/tscWatch/incremental.ts
index f4b7fa13ed4..5aca68f749d 100644
--- a/src/testRunner/unittests/tscWatch/incremental.ts
+++ b/src/testRunner/unittests/tscWatch/incremental.ts
@@ -276,5 +276,33 @@ export interface A {
             ],
             modifyFs: host => host.deleteFile(`${project}/globals.d.ts`)
         });
+
+        const jsxImportSourceOptions = { module: "commonjs", jsx: "react-jsx", incremental: true, jsxImportSource: "react" };
+        const jsxLibraryContent = `export namespace JSX {
+    interface Element {}
+    interface IntrinsicElements {
+        div: {
+            propA?: boolean;
+        };
+    }
+}
+export function jsx(...args: any[]): void;
+export function jsxs(...args: any[]): void;
+export const Fragment: unique symbol;
+`;
+
+        verifyIncrementalWatchEmit({
+            subScenario: "jsxImportSource option changed",
+            files: () => [
+                { path: libFile.path, content: libContent },
+                { path: `${project}/node_modules/react/jsx-runtime/index.d.ts`, content: jsxLibraryContent },
+                { path: `${project}/node_modules/react/package.json`, content: JSON.stringify({ name: "react", version: "0.0.1" }) },
+                { path: `${project}/node_modules/preact/jsx-runtime/index.d.ts`, content: jsxLibraryContent.replace("propA", "propB") },
+                { path: `${project}/node_modules/preact/package.json`, content: JSON.stringify({ name: "preact", version: "0.0.1" }) },
+                { path: `${project}/index.tsx`, content: `export const App = () => <div propA={true}></div>;` },
+                { path: configFile.path, content: JSON.stringify({ compilerOptions: jsxImportSourceOptions }) }
+            ],
+            modifyFs: host => host.writeFile(configFile.path, JSON.stringify({ compilerOptions: { ...jsxImportSourceOptions, jsxImportSource: "preact" } }))
+        });
     });
 }
diff --git a/tests/baselines/reference/tscWatch/incremental/jsxImportSource-option-changed-incremental.js b/tests/baselines/reference/tscWatch/incremental/jsxImportSource-option-changed-incremental.js
new file mode 100644
index 00000000000..e75b1813ec9
--- /dev/null
+++ b/tests/baselines/reference/tscWatch/incremental/jsxImportSource-option-changed-incremental.js
@@ -0,0 +1,248 @@
+Input::
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+interface ReadonlyArray<T> {}
+declare const console: { log(msg: any): void; };
+
+//// [/users/username/projects/project/node_modules/react/jsx-runtime/index.d.ts]
+export namespace JSX {
+    interface Element {}
+    interface IntrinsicElements {
+        div: {
+            propA?: boolean;
+        };
+    }
+}
+export function jsx(...args: any[]): void;
+export function jsxs(...args: any[]): void;
+export const Fragment: unique symbol;
+
+
+//// [/users/username/projects/project/node_modules/react/package.json]
+{"name":"react","version":"0.0.1"}
+
+//// [/users/username/projects/project/node_modules/preact/jsx-runtime/index.d.ts]
+export namespace JSX {
+    interface Element {}
+    interface IntrinsicElements {
+        div: {
+            propB?: boolean;
+        };
+    }
+}
+export function jsx(...args: any[]): void;
+export function jsxs(...args: any[]): void;
+export const Fragment: unique symbol;
+
+
+//// [/users/username/projects/project/node_modules/preact/package.json]
+{"name":"preact","version":"0.0.1"}
+
+//// [/users/username/projects/project/index.tsx]
+export const App = () => <div propA={true}></div>;
+
+//// [/users/username/projects/project/tsconfig.json]
+{"compilerOptions":{"module":"commonjs","jsx":"react-jsx","incremental":true,"jsxImportSource":"react"}}
+
+
+/a/lib/tsc.js -i
+Output::
+
+
+Program root files: ["/users/username/projects/project/index.tsx"]
+Program options: {"module":1,"jsx":4,"incremental":true,"jsxImportSource":"react","configFilePath":"/users/username/projects/project/tsconfig.json"}
+Program structureReused: Not
+Program files::
+/a/lib/lib.d.ts
+/users/username/projects/project/index.tsx
+/users/username/projects/project/node_modules/react/jsx-runtime/index.d.ts
+
+Semantic diagnostics in builder refreshed for::
+/a/lib/lib.d.ts
+/users/username/projects/project/index.tsx
+/users/username/projects/project/node_modules/react/jsx-runtime/index.d.ts
+
+WatchedFiles::
+
+FsWatches::
+
+FsWatchesRecursive::
+
+exitCode:: ExitStatus.Success
+
+//// [/users/username/projects/project/index.js]
+"use strict";
+exports.__esModule = true;
+exports.App = void 0;
+var jsx_runtime_1 = require("react/jsx-runtime");
+var App = function () { return jsx_runtime_1.jsx("div", { propA: true }, void 0); };
+exports.App = App;
+
+
+//// [/users/username/projects/project/tsconfig.tsbuildinfo]
+{
+  "program": {
+    "fileInfos": {
+      "../../../../a/lib/lib.d.ts": {
+        "version": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+        "signature": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+        "affectsGlobalScope": true
+      },
+      "./index.tsx": {
+        "version": "-14760199789-export const App = () => <div propA={true}></div>;",
+        "signature": "-17269688391-export declare const App: () => import(\"react/jsx-runtime\").JSX.Element;\n",
+        "affectsGlobalScope": false
+      },
+      "./node_modules/react/jsx-runtime/index.d.ts": {
+        "version": "-35656056833-export namespace JSX {\n    interface Element {}\n    interface IntrinsicElements {\n        div: {\n            propA?: boolean;\n        };\n    }\n}\nexport function jsx(...args: any[]): void;\nexport function jsxs(...args: any[]): void;\nexport const Fragment: unique symbol;\n",
+        "signature": "-35656056833-export namespace JSX {\n    interface Element {}\n    interface IntrinsicElements {\n        div: {\n            propA?: boolean;\n        };\n    }\n}\nexport function jsx(...args: any[]): void;\nexport function jsxs(...args: any[]): void;\nexport const Fragment: unique symbol;\n",
+        "affectsGlobalScope": false
+      }
+    },
+    "options": {
+      "module": 1,
+      "jsx": 4,
+      "incremental": true,
+      "jsxImportSource": "react",
+      "configFilePath": "./tsconfig.json"
+    },
+    "referencedMap": {},
+    "exportedModulesMap": {
+      "./index.tsx": [
+        "./node_modules/react/jsx-runtime/index.d.ts"
+      ]
+    },
+    "semanticDiagnosticsPerFile": [
+      "../../../../a/lib/lib.d.ts",
+      "./index.tsx",
+      "./node_modules/react/jsx-runtime/index.d.ts"
+    ]
+  },
+  "version": "FakeTSVersion"
+}
+
+
+Change::
+
+Input::
+//// [/users/username/projects/project/tsconfig.json]
+{"compilerOptions":{"module":"commonjs","jsx":"react-jsx","incremental":true,"jsxImportSource":"preact"}}
+
+
+Output::
+index.tsx:1:31 - error TS2322: Type '{ propA: boolean; }' is not assignable to type '{ propB?: boolean; }'.
+  Property 'propA' does not exist on type '{ propB?: boolean; }'. Did you mean 'propB'?
+
+1 export const App = () => <div propA={true}></div>;
+                                ~~~~~
+
+
+Found 1 error.
+
+
+
+Program root files: ["/users/username/projects/project/index.tsx"]
+Program options: {"module":1,"jsx":4,"incremental":true,"jsxImportSource":"preact","configFilePath":"/users/username/projects/project/tsconfig.json"}
+Program structureReused: Not
+Program files::
+/a/lib/lib.d.ts
+/users/username/projects/project/index.tsx
+/users/username/projects/project/node_modules/preact/jsx-runtime/index.d.ts
+
+Semantic diagnostics in builder refreshed for::
+/a/lib/lib.d.ts
+/users/username/projects/project/index.tsx
+/users/username/projects/project/node_modules/preact/jsx-runtime/index.d.ts
+
+WatchedFiles::
+
+FsWatches::
+
+FsWatchesRecursive::
+
+exitCode:: ExitStatus.DiagnosticsPresent_OutputsGenerated
+
+//// [/users/username/projects/project/index.js]
+"use strict";
+exports.__esModule = true;
+exports.App = void 0;
+var jsx_runtime_1 = require("preact/jsx-runtime");
+var App = function () { return jsx_runtime_1.jsx("div", { propA: true }, void 0); };
+exports.App = App;
+
+
+//// [/users/username/projects/project/tsconfig.tsbuildinfo]
+{
+  "program": {
+    "fileInfos": {
+      "../../../../a/lib/lib.d.ts": {
+        "version": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+        "signature": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+        "affectsGlobalScope": true
+      },
+      "./index.tsx": {
+        "version": "-14760199789-export const App = () => <div propA={true}></div>;",
+        "signature": "-17269688391-export declare const App: () => import(\"react/jsx-runtime\").JSX.Element;\n",
+        "affectsGlobalScope": false
+      },
+      "./node_modules/preact/jsx-runtime/index.d.ts": {
+        "version": "-17896129664-export namespace JSX {\n    interface Element {}\n    interface IntrinsicElements {\n        div: {\n            propB?: boolean;\n        };\n    }\n}\nexport function jsx(...args: any[]): void;\nexport function jsxs(...args: any[]): void;\nexport const Fragment: unique symbol;\n",
+        "signature": "-17896129664-export namespace JSX {\n    interface Element {}\n    interface IntrinsicElements {\n        div: {\n            propB?: boolean;\n        };\n    }\n}\nexport function jsx(...args: any[]): void;\nexport function jsxs(...args: any[]): void;\nexport const Fragment: unique symbol;\n",
+        "affectsGlobalScope": false
+      }
+    },
+    "options": {
+      "module": 1,
+      "jsx": 4,
+      "incremental": true,
+      "jsxImportSource": "preact",
+      "configFilePath": "./tsconfig.json"
+    },
+    "referencedMap": {},
+    "exportedModulesMap": {
+      "./index.tsx": [
+        "./node_modules/react/jsx-runtime/index.d.ts"
+      ]
+    },
+    "semanticDiagnosticsPerFile": [
+      "../../../../a/lib/lib.d.ts",
+      [
+        "./index.tsx",
+        [
+          {
+            "file": "./index.tsx",
+            "start": 30,
+            "length": 5,
+            "code": 2322,
+            "category": 1,
+            "messageText": {
+              "messageText": "Type '{ propA: boolean; }' is not assignable to type '{ propB?: boolean; }'.",
+              "category": 1,
+              "code": 2322,
+              "next": [
+                {
+                  "messageText": "Property 'propA' does not exist on type '{ propB?: boolean; }'. Did you mean 'propB'?",
+                  "category": 1,
+                  "code": 2551
+                }
+              ]
+            }
+          }
+        ]
+      ],
+      "./node_modules/preact/jsx-runtime/index.d.ts"
+    ]
+  },
+  "version": "FakeTSVersion"
+}
+
diff --git a/tests/baselines/reference/tscWatch/incremental/jsxImportSource-option-changed-watch.js b/tests/baselines/reference/tscWatch/incremental/jsxImportSource-option-changed-watch.js
new file mode 100644
index 00000000000..49bd165b3b1
--- /dev/null
+++ b/tests/baselines/reference/tscWatch/incremental/jsxImportSource-option-changed-watch.js
@@ -0,0 +1,285 @@
+Input::
+//// [/a/lib/lib.d.ts]
+/// <reference no-default-lib="true"/>
+interface Boolean {}
+interface Function {}
+interface CallableFunction {}
+interface NewableFunction {}
+interface IArguments {}
+interface Number { toExponential: any; }
+interface Object {}
+interface RegExp {}
+interface String { charAt: any; }
+interface Array<T> { length: number; [n: number]: T; }
+interface ReadonlyArray<T> {}
+declare const console: { log(msg: any): void; };
+
+//// [/users/username/projects/project/node_modules/react/jsx-runtime/index.d.ts]
+export namespace JSX {
+    interface Element {}
+    interface IntrinsicElements {
+        div: {
+            propA?: boolean;
+        };
+    }
+}
+export function jsx(...args: any[]): void;
+export function jsxs(...args: any[]): void;
+export const Fragment: unique symbol;
+
+
+//// [/users/username/projects/project/node_modules/react/package.json]
+{"name":"react","version":"0.0.1"}
+
+//// [/users/username/projects/project/node_modules/preact/jsx-runtime/index.d.ts]
+export namespace JSX {
+    interface Element {}
+    interface IntrinsicElements {
+        div: {
+            propB?: boolean;
+        };
+    }
+}
+export function jsx(...args: any[]): void;
+export function jsxs(...args: any[]): void;
+export const Fragment: unique symbol;
+
+
+//// [/users/username/projects/project/node_modules/preact/package.json]
+{"name":"preact","version":"0.0.1"}
+
+//// [/users/username/projects/project/index.tsx]
+export const App = () => <div propA={true}></div>;
+
+//// [/users/username/projects/project/tsconfig.json]
+{"compilerOptions":{"module":"commonjs","jsx":"react-jsx","incremental":true,"jsxImportSource":"react"}}
+
+
+/a/lib/tsc.js -w
+Output::
+>> Screen clear
+[12:00:39 AM] Starting compilation in watch mode...
+
+[12:00:44 AM] Found 0 errors. Watching for file changes.
+
+
+
+Program root files: ["/users/username/projects/project/index.tsx"]
+Program options: {"module":1,"jsx":4,"incremental":true,"jsxImportSource":"react","watch":true,"configFilePath":"/users/username/projects/project/tsconfig.json"}
+Program structureReused: Not
+Program files::
+/a/lib/lib.d.ts
+/users/username/projects/project/index.tsx
+/users/username/projects/project/node_modules/react/jsx-runtime/index.d.ts
+
+Semantic diagnostics in builder refreshed for::
+/a/lib/lib.d.ts
+/users/username/projects/project/index.tsx
+/users/username/projects/project/node_modules/react/jsx-runtime/index.d.ts
+
+WatchedFiles::
+/users/username/projects/project/tsconfig.json:
+  {"fileName":"/users/username/projects/project/tsconfig.json","pollingInterval":250}
+/users/username/projects/project/index.tsx:
+  {"fileName":"/users/username/projects/project/index.tsx","pollingInterval":250}
+/users/username/projects/project/node_modules/react/jsx-runtime/index.d.ts:
+  {"fileName":"/users/username/projects/project/node_modules/react/jsx-runtime/index.d.ts","pollingInterval":250}
+/a/lib/lib.d.ts:
+  {"fileName":"/a/lib/lib.d.ts","pollingInterval":250}
+
+FsWatches::
+
+FsWatchesRecursive::
+/users/username/projects/project/node_modules:
+  {"directoryName":"/users/username/projects/project/node_modules","fallbackPollingInterval":500,"fallbackOptions":{"watchFile":"PriorityPollingInterval"}}
+/users/username/projects/project/node_modules/@types:
+  {"directoryName":"/users/username/projects/project/node_modules/@types","fallbackPollingInterval":500,"fallbackOptions":{"watchFile":"PriorityPollingInterval"}}
+/users/username/projects/project:
+  {"directoryName":"/users/username/projects/project","fallbackPollingInterval":500,"fallbackOptions":{"watchFile":"PriorityPollingInterval"}}
+
+exitCode:: ExitStatus.undefined
+
+//// [/users/username/projects/project/index.js]
+"use strict";
+exports.__esModule = true;
+exports.App = void 0;
+var jsx_runtime_1 = require("react/jsx-runtime");
+var App = function () { return jsx_runtime_1.jsx("div", { propA: true }, void 0); };
+exports.App = App;
+
+
+//// [/users/username/projects/project/tsconfig.tsbuildinfo]
+{
+  "program": {
+    "fileInfos": {
+      "../../../../a/lib/lib.d.ts": {
+        "version": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+        "signature": "3858781397-/// <reference no-default-lib=\"true\"/>\ninterface Boolean {}\ninterface Function {}\ninterface CallableFunction {}\ninterface NewableFunction {}\ninterface IArguments {}\ninterface Number { toExponential: any; }\ninterface Object {}\ninterface RegExp {}\ninterface String { charAt: any; }\ninterface Array<T> { length: number; [n: number]: T; }\ninterface ReadonlyArray<T> {}\ndeclare const console: { log(msg: any): void; };",
+        "affectsGlobalScope": true
+      },
+      "./index.tsx": {
+        "version": "-14760199789-export const App = () => <div propA={true}></div>;",
+        "signature": "-17269688391-export declare const App: () => import(\"react/jsx-runtime\").JSX.Element;\n",
+        "affectsGlobalScope": false
+      },
+      "./node_modules/react/jsx-runtime/index.d.ts": {
+        "version": "-35656056833-export namespace JSX {\n    interface Element {}\n    interface IntrinsicElements {\n        div: {\n            propA?: boolean;\n        };\n    }\n}\nexport function jsx(...args: any[]): void;\nexport function jsxs(...args: any[]): void;\nexport const Fragment: unique symbol;\n",
+        "signature": "-35656056833-export namespace JSX {\n    interface Element {}\n    interface IntrinsicElements {\n        div: {\n            propA?: boolean;\n        };\n    }\n}\nexport function jsx(...args: any[]): void;\nexport function jsxs(...args: any[]): void;\nexport const Fragment: unique symbol;\n",
+        "affectsGlobalScope": false
+      }
+    },
+    "options": {
+      "module": 1,
+      "jsx": 4,
+      "incremental": true,
+      "jsxImportSource": "react",
+      "watch": true,
+      "configFilePath": "./tsconfig.json"
+    },
+    "referencedMap": {},
+    "exportedModulesMap": {
+      "./index.tsx": [
+        "./node_modules/react/jsx-runtime/index.d.ts"
+      ]
+    },
+    "semanticDiagnosticsPerFile": [
+      "../../../../a/lib/lib.d.ts",
+      "./index.tsx",
+      "./node_modules/react/jsx-runtime/index.d.ts"
+    ]
+  },
+  "version": "FakeTSVersion"
+}
+
+
+Change::
+
+Input::
+//// [/users/username/projects/project/tsconfig.json]
+{"compilerOptions":{"module":"commonjs","jsx":"react-jsx","incremental":true,"jsxImportSource":"preact"}}
+
+
+Output::
+>> Screen clear
+[12:00:48 AM] Starting compilation in watch mode...
+
+index.tsx:1:31 - error TS2322: Type '{ propA: boolean; }' is not assignable to type '{ propB?: boolean; }'.
+  Property 'propA' does not exist on type '{ propB?: boolean; }'. Did you mean 'propB'?
+
+1 export const App = () => <div propA={true}></div>;
+                                ~~~~~
+
+[12:00:55 AM] Found 1 error. Watching for file changes.
+
+
+
+Program root files: ["/users/username/projects/project/index.tsx"]
+Program options: {"module":1,"jsx":4,"incremental":true,"jsxImportSource":"preact","watch":true,"configFilePath":"/users/username/projects/project/tsconfig.json"}
+Program structureReused: Not
+Program files::
+/a/lib/lib.d.ts
+/users/username/projects/project/index.tsx
+/users/username/projects/project/node_modules/preact/jsx-runtime/index.d.ts
+
+Semantic diagnostics in builder refreshed for::
+/a/lib/lib.d.ts
+/users/username/projects/project/index.tsx
+/users/username/projects/project/node_modules/preact/jsx-runtime/index.d.ts
+
+WatchedFiles::
+/users/username/projects/project/tsconfig.json:
+  {"fileName":"/users/username/projects/project/tsconfig.json","pollingInterval":250}
+/users/username/projects/project/index.tsx:
+  {"fileName":"/users/username/projects/project/index.tsx","pollingInterval":250}
+/users/username/projects/project/node_modules/preact/jsx-runtime/index.d.ts:
+  {"fileName":"/users/username/projects/project/node_modules/preact/jsx-runtime/index.d.ts","pollingInterval":250}
+/a/lib/lib.d.ts:
+  {"fileName":"/a/lib/lib.d.ts","pollingInterval":250}
+
+FsWatches::
+
+FsWatchesRecursive::
+/users/username/projects/project/node_modules:
+  {"directoryName":"/users/username/projects/project/node_modules","fallbackPollingInterval":500,"fallbackOptions":{"watchFile":"PriorityPollingInterval"}}
+/users/username/projects/project/node_modules/@types:
+  {"directoryName":"/users/username/projects/project/node_modules/@types","fallbackPollingInterval":500,"fallbackOptions":{"watchFile":"PriorityPollingInterval"}}
+/users/username/projects/project:
+  {"directoryName":"/users/username/projects/project","fallbackPollingInterval":500,"fallbackOptions":{"watchFile":"PriorityPollingInterval"}}
+
+exitCode:: ExitStatus.undefined
+
+//// [/users/username/projects/project/index.js]
+"use strict";
+exports.__esModule = true;
+exports.App = void 0;
+var jsx_runtime_1 = require("preact/jsx-runtime");
+var App = function () { return jsx_runtime_1.jsx("div", { propA: true }, void 0); };
+exports.App = App;
+
+
+//// [/users/username/projects/project/tsconfig.tsbuildinfo]
+{
+  "program": {
+    "fileInfos": {
+      "../../../../a/lib/lib.d.ts": {
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+}
+