diff --git a/src/harness/vfs.ts b/src/harness/vfs.ts
index 5ef5851433a..25da3149834 100644
--- a/src/harness/vfs.ts
+++ b/src/harness/vfs.ts
@@ -33,6 +33,10 @@ namespace vfs {
     let devCount = 0; // A monotonically increasing count of device ids
     let inoCount = 0; // A monotonically increasing count of inodes
 
+    export interface DiffOptions {
+        includeChangedFileWithSameContent?: boolean;
+    }
+
     /**
      * Represents a virtual POSIX-like file system.
      */
@@ -693,21 +697,25 @@ namespace vfs {
          * Generates a `FileSet` patch containing all the entries in this `FileSystem` that are not in `base`.
          * @param base The base file system. If not provided, this file system's `shadowRoot` is used (if present).
          */
-        public diff(base = this.shadowRoot) {
+        public diff(base = this.shadowRoot, options: DiffOptions = {}) {
             const differences: FileSet = {};
-            const hasDifferences = base ? FileSystem.rootDiff(differences, this, base) : FileSystem.trackCreatedInodes(differences, this, this._getRootLinks());
+            const hasDifferences = base ?
+                FileSystem.rootDiff(differences, this, base, options) :
+                FileSystem.trackCreatedInodes(differences, this, this._getRootLinks());
             return hasDifferences ? differences : undefined;
         }
 
         /**
          * Generates a `FileSet` patch containing all the entries in `chagned` that are not in `base`.
          */
-        public static diff(changed: FileSystem, base: FileSystem) {
+        public static diff(changed: FileSystem, base: FileSystem, options: DiffOptions = {}) {
             const differences: FileSet = {};
-            return FileSystem.rootDiff(differences, changed, base) ? differences : undefined;
+            return FileSystem.rootDiff(differences, changed, base, options) ?
+                differences :
+                undefined;
         }
 
-        private static diffWorker(container: FileSet, changed: FileSystem, changedLinks: ReadonlyMap<string, Inode> | undefined, base: FileSystem, baseLinks: ReadonlyMap<string, Inode> | undefined) {
+        private static diffWorker(container: FileSet, changed: FileSystem, changedLinks: ReadonlyMap<string, Inode> | undefined, base: FileSystem, baseLinks: ReadonlyMap<string, Inode> | undefined, options: DiffOptions) {
             if (changedLinks && !baseLinks) return FileSystem.trackCreatedInodes(container, changed, changedLinks);
             if (baseLinks && !changedLinks) return FileSystem.trackDeletedInodes(container, baseLinks);
             if (changedLinks && baseLinks) {
@@ -724,10 +732,10 @@ namespace vfs {
                     const baseNode = baseLinks.get(basename);
                     if (baseNode) {
                         if (isDirectory(changedNode) && isDirectory(baseNode)) {
-                            return hasChanges = FileSystem.directoryDiff(container, basename, changed, changedNode, base, baseNode) || hasChanges;
+                            return hasChanges = FileSystem.directoryDiff(container, basename, changed, changedNode, base, baseNode, options) || hasChanges;
                         }
                         if (isFile(changedNode) && isFile(baseNode)) {
-                            return hasChanges = FileSystem.fileDiff(container, basename, changed, changedNode, base, baseNode) || hasChanges;
+                            return hasChanges = FileSystem.fileDiff(container, basename, changed, changedNode, base, baseNode, options) || hasChanges;
                         }
                         if (isSymlink(changedNode) && isSymlink(baseNode)) {
                             return hasChanges = FileSystem.symlinkDiff(container, basename, changedNode, baseNode) || hasChanges;
@@ -740,7 +748,7 @@ namespace vfs {
             return false;
         }
 
-        private static rootDiff(container: FileSet, changed: FileSystem, base: FileSystem) {
+        private static rootDiff(container: FileSet, changed: FileSystem, base: FileSystem, options: DiffOptions) {
             while (!changed._lazy.links && changed._shadowRoot) changed = changed._shadowRoot;
             while (!base._lazy.links && base._shadowRoot) base = base._shadowRoot;
 
@@ -750,10 +758,10 @@ namespace vfs {
             // no difference if the root links are empty and unshadowed
             if (!changed._lazy.links && !changed._shadowRoot && !base._lazy.links && !base._shadowRoot) return false;
 
-            return FileSystem.diffWorker(container, changed, changed._getRootLinks(), base, base._getRootLinks());
+            return FileSystem.diffWorker(container, changed, changed._getRootLinks(), base, base._getRootLinks(), options);
         }
 
-        private static directoryDiff(container: FileSet, basename: string, changed: FileSystem, changedNode: DirectoryInode, base: FileSystem, baseNode: DirectoryInode) {
+        private static directoryDiff(container: FileSet, basename: string, changed: FileSystem, changedNode: DirectoryInode, base: FileSystem, baseNode: DirectoryInode, options: DiffOptions) {
             while (!changedNode.links && changedNode.shadowRoot) changedNode = changedNode.shadowRoot;
             while (!baseNode.links && baseNode.shadowRoot) baseNode = baseNode.shadowRoot;
 
@@ -770,7 +778,7 @@ namespace vfs {
 
             // no difference if both nodes have identical children
             const children: FileSet = {};
-            if (!FileSystem.diffWorker(children, changed, changed._getLinks(changedNode), base, base._getLinks(baseNode))) {
+            if (!FileSystem.diffWorker(children, changed, changed._getLinks(changedNode), base, base._getLinks(baseNode), options)) {
                 return false;
             }
 
@@ -778,7 +786,7 @@ namespace vfs {
             return true;
         }
 
-        private static fileDiff(container: FileSet, basename: string, changed: FileSystem, changedNode: FileInode, base: FileSystem, baseNode: FileInode) {
+        private static fileDiff(container: FileSet, basename: string, changed: FileSystem, changedNode: FileInode, base: FileSystem, baseNode: FileInode, options: DiffOptions) {
             while (!changedNode.buffer && changedNode.shadowRoot) changedNode = changedNode.shadowRoot;
             while (!baseNode.buffer && baseNode.shadowRoot) baseNode = baseNode.shadowRoot;
 
@@ -800,7 +808,11 @@ namespace vfs {
             if (changedBuffer === baseBuffer) return false;
 
             // no difference if both buffers are identical
-            if (Buffer.compare(changedBuffer, baseBuffer) === 0) return false;
+            if (Buffer.compare(changedBuffer, baseBuffer) === 0) {
+                if (!options.includeChangedFileWithSameContent) return false;
+                container[basename] = new SameFileContentFile(changedBuffer);
+                return true;
+            }
 
             container[basename] = new File(changedBuffer);
             return true;
@@ -1360,6 +1372,12 @@ namespace vfs {
         }
     }
 
+    export class SameFileContentFile extends File {
+        constructor(data: Buffer | string, metaAndEncoding?: { encoding?: string, meta?: Record<string, any> }) {
+            super(data, metaAndEncoding);
+        }
+    }
+
     /** Extended options for a hard link in a `FileSet` */
     export class Link {
         public readonly path: string;
@@ -1546,6 +1564,9 @@ namespace vfs {
             else if (entry instanceof Directory) {
                 text += formatPatchWorker(file, entry.files);
             }
+            else if (entry instanceof SameFileContentFile) {
+                text += `//// [${file}] file written with same contents\r\n`;
+            }
             else if (entry instanceof File) {
                 const content = typeof entry.data === "string" ? entry.data : entry.data.toString("utf8");
                 text += `//// [${file}]\r\n${content}\r\n\r\n`;
@@ -1582,4 +1603,4 @@ namespace vfs {
         }
     }
 }
-// tslint:enable:no-null-keyword
\ No newline at end of file
+// tslint:enable:no-null-keyword
diff --git a/src/testRunner/unittests/tsbuild/helpers.ts b/src/testRunner/unittests/tsbuild/helpers.ts
index c20cdeb7f94..ab8461a14e6 100644
--- a/src/testRunner/unittests/tsbuild/helpers.ts
+++ b/src/testRunner/unittests/tsbuild/helpers.ts
@@ -285,7 +285,7 @@ interface Symbol {
     }
 
     function generateBaseline(fs: vfs.FileSystem, proj: string, scenario: string, subScenario: string, baseFs: vfs.FileSystem) {
-        const patch = fs.diff(baseFs);
+        const patch = fs.diff(baseFs, { includeChangedFileWithSameContent: true });
         // tslint:disable-next-line:no-null-keyword
         Harness.Baseline.runBaseline(`tsbuild/${proj}/${subScenario.split(" ").join("-")}/${scenario.split(" ").join("-")}.js`, patch ? vfs.formatPatch(patch) : null);
     }
diff --git a/tests/baselines/reference/tsbuild/amdModulesWithOut/incremental-declaration-doesnt-change/modules-and-globals-mixed-in-amd.js b/tests/baselines/reference/tsbuild/amdModulesWithOut/incremental-declaration-doesnt-change/modules-and-globals-mixed-in-amd.js
index e30eed1615a..87ace04e448 100644
--- a/tests/baselines/reference/tsbuild/amdModulesWithOut/incremental-declaration-doesnt-change/modules-and-globals-mixed-in-amd.js
+++ b/tests/baselines/reference/tsbuild/amdModulesWithOut/incremental-declaration-doesnt-change/modules-and-globals-mixed-in-amd.js
@@ -332,6 +332,9 @@ declare const myVar = 30;
 //// [/src/lib/file1.ts]
 export const x = 10;console.log(x);
 
+//// [/src/lib/module.d.ts] file written with same contents
+//// [/src/lib/module.d.ts.map] file written with same contents
+//// [/src/lib/module.d.ts.map.baseline.txt] file written with same contents
 //// [/src/lib/module.js]
 var myGlob = 20;
 define("file1", ["require", "exports"], function (require, exports) {
diff --git a/tests/baselines/reference/tsbuild/amdModulesWithOut/incremental-declaration-doesnt-change/multiple-emitHelpers-in-all-projects.js b/tests/baselines/reference/tsbuild/amdModulesWithOut/incremental-declaration-doesnt-change/multiple-emitHelpers-in-all-projects.js
index 6297215f3ca..2b4e0a0a838 100644
--- a/tests/baselines/reference/tsbuild/amdModulesWithOut/incremental-declaration-doesnt-change/multiple-emitHelpers-in-all-projects.js
+++ b/tests/baselines/reference/tsbuild/amdModulesWithOut/incremental-declaration-doesnt-change/multiple-emitHelpers-in-all-projects.js
@@ -790,6 +790,9 @@ export const x = 10;function forlibfile1Rest() {
 const { b, ...rest } = { a: 10, b: 30, yy: 30 };
 }console.log(x);
 
+//// [/src/lib/module.d.ts] file written with same contents
+//// [/src/lib/module.d.ts.map] file written with same contents
+//// [/src/lib/module.d.ts.map.baseline.txt] file written with same contents
 //// [/src/lib/module.js]
 var __read = (this && this.__read) || function (o, n) {
     var m = typeof Symbol === "function" && o[Symbol.iterator];
diff --git a/tests/baselines/reference/tsbuild/amdModulesWithOut/incremental-declaration-doesnt-change/multiple-prologues-in-all-projects.js b/tests/baselines/reference/tsbuild/amdModulesWithOut/incremental-declaration-doesnt-change/multiple-prologues-in-all-projects.js
index 689dc08570f..f7252e6dcbc 100644
--- a/tests/baselines/reference/tsbuild/amdModulesWithOut/incremental-declaration-doesnt-change/multiple-prologues-in-all-projects.js
+++ b/tests/baselines/reference/tsbuild/amdModulesWithOut/incremental-declaration-doesnt-change/multiple-prologues-in-all-projects.js
@@ -482,6 +482,9 @@ declare const myVar = 30;
 //// [/src/lib/file1.ts]
 export const x = 10;console.log(x);
 
+//// [/src/lib/module.d.ts] file written with same contents
+//// [/src/lib/module.d.ts.map] file written with same contents
+//// [/src/lib/module.d.ts.map.baseline.txt] file written with same contents
 //// [/src/lib/module.js]
 "use strict";
 "myPrologue";
diff --git a/tests/baselines/reference/tsbuild/amdModulesWithOut/incremental-declaration-doesnt-change/shebang-in-all-projects.js b/tests/baselines/reference/tsbuild/amdModulesWithOut/incremental-declaration-doesnt-change/shebang-in-all-projects.js
index d55f61ae925..3cf10ffbe19 100644
--- a/tests/baselines/reference/tsbuild/amdModulesWithOut/incremental-declaration-doesnt-change/shebang-in-all-projects.js
+++ b/tests/baselines/reference/tsbuild/amdModulesWithOut/incremental-declaration-doesnt-change/shebang-in-all-projects.js
@@ -338,6 +338,9 @@ declare const myVar = 30;
 #!someshebang lib file1
 export const x = 10;console.log(x);
 
+//// [/src/lib/module.d.ts] file written with same contents
+//// [/src/lib/module.d.ts.map] file written with same contents
+//// [/src/lib/module.d.ts.map.baseline.txt] file written with same contents
 //// [/src/lib/module.js]
 #!someshebang lib file0
 var myGlob = 20;
diff --git a/tests/baselines/reference/tsbuild/amdModulesWithOut/incremental-declaration-doesnt-change/stripInternal.js b/tests/baselines/reference/tsbuild/amdModulesWithOut/incremental-declaration-doesnt-change/stripInternal.js
index 16f1d50a224..4de45c6d0ec 100644
--- a/tests/baselines/reference/tsbuild/amdModulesWithOut/incremental-declaration-doesnt-change/stripInternal.js
+++ b/tests/baselines/reference/tsbuild/amdModulesWithOut/incremental-declaration-doesnt-change/stripInternal.js
@@ -1893,6 +1893,9 @@ export namespace normalN {
 /*@internal*/ export const internalConst = 10;
 /*@internal*/ export enum internalEnum { a, b, c }console.log(x);
 
+//// [/src/lib/module.d.ts] file written with same contents
+//// [/src/lib/module.d.ts.map] file written with same contents
+//// [/src/lib/module.d.ts.map.baseline.txt] file written with same contents
 //// [/src/lib/module.js]
 /*@internal*/ var myGlob = 20;
 define("file1", ["require", "exports"], function (require, exports) {
diff --git a/tests/baselines/reference/tsbuild/amdModulesWithOut/incremental-declaration-doesnt-change/triple-slash-refs-in-all-projects.js b/tests/baselines/reference/tsbuild/amdModulesWithOut/incremental-declaration-doesnt-change/triple-slash-refs-in-all-projects.js
index ece0a5fc25a..479ea723921 100644
--- a/tests/baselines/reference/tsbuild/amdModulesWithOut/incremental-declaration-doesnt-change/triple-slash-refs-in-all-projects.js
+++ b/tests/baselines/reference/tsbuild/amdModulesWithOut/incremental-declaration-doesnt-change/triple-slash-refs-in-all-projects.js
@@ -432,6 +432,9 @@ declare const myVar = 30;
 //// [/src/lib/file1.ts]
 export const x = 10;console.log(x);
 
+//// [/src/lib/module.d.ts] file written with same contents
+//// [/src/lib/module.d.ts.map] file written with same contents
+//// [/src/lib/module.d.ts.map.baseline.txt] file written with same contents
 //// [/src/lib/module.js]
 ///<reference path="./tripleRef.d.ts"/>
 var file0Const = new libfile0();
diff --git a/tests/baselines/reference/tsbuild/amdModulesWithOut/incremental-headers-change-without-dts-changes/multiple-emitHelpers-in-all-projects.js b/tests/baselines/reference/tsbuild/amdModulesWithOut/incremental-headers-change-without-dts-changes/multiple-emitHelpers-in-all-projects.js
index 6c9be3154a5..54c0b8fe21e 100644
--- a/tests/baselines/reference/tsbuild/amdModulesWithOut/incremental-headers-change-without-dts-changes/multiple-emitHelpers-in-all-projects.js
+++ b/tests/baselines/reference/tsbuild/amdModulesWithOut/incremental-headers-change-without-dts-changes/multiple-emitHelpers-in-all-projects.js
@@ -724,6 +724,9 @@ declare function appfile4Spread(...b: number[]): void;
 //// [/src/lib/file1.ts]
 export const x = 10;function forlibfile1Rest() { }
 
+//// [/src/lib/module.d.ts] file written with same contents
+//// [/src/lib/module.d.ts.map] file written with same contents
+//// [/src/lib/module.d.ts.map.baseline.txt] file written with same contents
 //// [/src/lib/module.js]
 var __read = (this && this.__read) || function (o, n) {
     var m = typeof Symbol === "function" && o[Symbol.iterator];
diff --git a/tests/baselines/reference/tsbuild/amdModulesWithOut/incremental-headers-change-without-dts-changes/multiple-prologues-in-all-projects.js b/tests/baselines/reference/tsbuild/amdModulesWithOut/incremental-headers-change-without-dts-changes/multiple-prologues-in-all-projects.js
index df3412c267c..ad401641be8 100644
--- a/tests/baselines/reference/tsbuild/amdModulesWithOut/incremental-headers-change-without-dts-changes/multiple-prologues-in-all-projects.js
+++ b/tests/baselines/reference/tsbuild/amdModulesWithOut/incremental-headers-change-without-dts-changes/multiple-prologues-in-all-projects.js
@@ -647,6 +647,7 @@ declare const myVar = 30;
 "myPrologue5"
 export const x = 10;
 
+//// [/src/lib/module.d.ts] file written with same contents
 //// [/src/lib/module.d.ts.map]
 {"version":3,"file":"module.d.ts","sourceRoot":"","sources":["file0.ts","file1.ts","file2.ts","global.ts"],"names":[],"mappings":"AACA,QAAA,MAAM,MAAM,KAAK,CAAC;;ICAlB,MAAM,CAAC,MAAM,CAAC,KAAK,CAAC;;;ICApB,MAAM,CAAC,MAAM,CAAC,KAAK,CAAC;;ACApB,QAAA,MAAM,WAAW,KAAK,CAAC"}
 
diff --git a/tests/baselines/reference/tsbuild/amdModulesWithOut/incremental-headers-change-without-dts-changes/stripInternal.js b/tests/baselines/reference/tsbuild/amdModulesWithOut/incremental-headers-change-without-dts-changes/stripInternal.js
index 1c8bad6c40a..218681bea8f 100644
--- a/tests/baselines/reference/tsbuild/amdModulesWithOut/incremental-headers-change-without-dts-changes/stripInternal.js
+++ b/tests/baselines/reference/tsbuild/amdModulesWithOut/incremental-headers-change-without-dts-changes/stripInternal.js
@@ -2071,6 +2071,7 @@ export namespace normalN {
 /*@internal*/ export const internalConst = 10;
 /*@internal*/ export enum internalEnum { a, b, c }
 
+//// [/src/lib/module.d.ts] file written with same contents
 //// [/src/lib/module.d.ts.map]
 {"version":3,"file":"module.d.ts","sourceRoot":"","sources":["file0.ts","file1.ts","file2.ts","global.ts"],"names":[],"mappings":"AAAc,QAAA,MAAM,MAAM,KAAK,CAAC;;ICAlB,MAAM,CAAC,MAAM,CAAC,KAAK,CAAC;IAClC,MAAM,OAAO,OAAO;;QAEF,IAAI,EAAE,MAAM,CAAC;QACb,MAAM;sBACF,CAAC,EACM,MAAM;KAClC;IACD,MAAM,WAAW,OAAO,CAAC;QACP,MAAa,CAAC;SAAI;QAClB,SAAgB,GAAG,SAAK;QACxB,UAAiB,aAAa,CAAC;YAAE,MAAa,CAAC;aAAG;SAAE;QACpD,UAAiB,SAAS,CAAC,SAAS,CAAC;YAAE,MAAa,SAAS;aAAG;SAAE;QAClE,MAAM,QAAQ,UAAU,GAAG,aAAa,CAAC,CAAC,CAAC;QAC3C,KAAY,YAAY,GAAG,SAAS,CAAC;QAC9B,MAAM,aAAa,KAAK,CAAC;QAChC,KAAY,YAAY;YAAG,CAAC,IAAA;YAAE,CAAC,IAAA;YAAE,CAAC,IAAA;SAAE;KACrD;IACa,MAAM,OAAO,SAAS;KAAG;IACzB,MAAM,UAAU,WAAW,SAAK;IAChC,MAAM,WAAW,iBAAiB,CAAC;QAAE,MAAa,SAAS;SAAG;KAAE;IAChE,MAAM,WAAW,aAAa,CAAC,SAAS,CAAC;QAAE,MAAa,SAAS;SAAG;KAAE;IACtE,MAAM,QAAQ,cAAc,GAAG,iBAAiB,CAAC,SAAS,CAAC;IAC3D,MAAM,MAAM,YAAY,GAAG,SAAS,CAAC;IACrC,MAAM,CAAC,MAAM,aAAa,KAAK,CAAC;IAChC,MAAM,MAAM,YAAY;QAAG,CAAC,IAAA;QAAE,CAAC,IAAA;QAAE,CAAC,IAAA;KAAE;;;ICzBlD,MAAM,CAAC,MAAM,CAAC,KAAK,CAAC;;ACApB,QAAA,MAAM,WAAW,KAAK,CAAC"}
 
diff --git a/tests/baselines/reference/tsbuild/emitDeclarationOnly/incremental-declaration-changes/only-dts-output-in-circular-import-project-with-emitDeclarationOnly-and-declarationMap.js b/tests/baselines/reference/tsbuild/emitDeclarationOnly/incremental-declaration-changes/only-dts-output-in-circular-import-project-with-emitDeclarationOnly-and-declarationMap.js
index 9a793388ac0..f4675cfcd15 100644
--- a/tests/baselines/reference/tsbuild/emitDeclarationOnly/incremental-declaration-changes/only-dts-output-in-circular-import-project-with-emitDeclarationOnly-and-declarationMap.js
+++ b/tests/baselines/reference/tsbuild/emitDeclarationOnly/incremental-declaration-changes/only-dts-output-in-circular-import-project-with-emitDeclarationOnly-and-declarationMap.js
@@ -9,6 +9,12 @@ export interface A {
 //// [/src/lib/a.d.ts.map]
 {"version":3,"file":"a.d.ts","sourceRoot":"","sources":["../src/a.ts"],"names":[],"mappings":"AAAA,OAAO,EAAE,CAAC,EAAE,MAAM,KAAK,CAAC;AAExB,MAAM,WAAW,CAAC;IAChB,CAAC,EAAE,CAAC,CAAC;IAAC,GAAG,EAAE,GAAG,CAAC;CAChB"}
 
+//// [/src/lib/b.d.ts] file written with same contents
+//// [/src/lib/b.d.ts.map] file written with same contents
+//// [/src/lib/c.d.ts] file written with same contents
+//// [/src/lib/c.d.ts.map] file written with same contents
+//// [/src/lib/index.d.ts] file written with same contents
+//// [/src/lib/index.d.ts.map] file written with same contents
 //// [/src/src/a.ts]
 import { B } from "./b";
 
diff --git a/tests/baselines/reference/tsbuild/emitDeclarationOnly/incremental-declaration-changes/only-dts-output-in-circular-import-project-with-emitDeclarationOnly.js b/tests/baselines/reference/tsbuild/emitDeclarationOnly/incremental-declaration-changes/only-dts-output-in-circular-import-project-with-emitDeclarationOnly.js
index a86656dbed5..a1297732a88 100644
--- a/tests/baselines/reference/tsbuild/emitDeclarationOnly/incremental-declaration-changes/only-dts-output-in-circular-import-project-with-emitDeclarationOnly.js
+++ b/tests/baselines/reference/tsbuild/emitDeclarationOnly/incremental-declaration-changes/only-dts-output-in-circular-import-project-with-emitDeclarationOnly.js
@@ -6,6 +6,9 @@ export interface A {
 }
 
 
+//// [/src/lib/b.d.ts] file written with same contents
+//// [/src/lib/c.d.ts] file written with same contents
+//// [/src/lib/index.d.ts] file written with same contents
 //// [/src/src/a.ts]
 import { B } from "./b";
 
diff --git a/tests/baselines/reference/tsbuild/emitDeclarationOnly/incremental-declaration-changes/only-dts-output-in-non-circular-imports-project-with-emitDeclarationOnly.js b/tests/baselines/reference/tsbuild/emitDeclarationOnly/incremental-declaration-changes/only-dts-output-in-non-circular-imports-project-with-emitDeclarationOnly.js
index 8a70278d315..c5eb746e843 100644
--- a/tests/baselines/reference/tsbuild/emitDeclarationOnly/incremental-declaration-changes/only-dts-output-in-non-circular-imports-project-with-emitDeclarationOnly.js
+++ b/tests/baselines/reference/tsbuild/emitDeclarationOnly/incremental-declaration-changes/only-dts-output-in-non-circular-imports-project-with-emitDeclarationOnly.js
@@ -11,6 +11,10 @@ export interface A {
 //// [/src/lib/a.d.ts.map]
 {"version":3,"file":"a.d.ts","sourceRoot":"","sources":["../src/a.ts"],"names":[],"mappings":"AAAA,qBAAa,CAAC;IAAG,IAAI,SAAW;CAAE;AAElC,MAAM,WAAW,CAAC;IAChB,CAAC,EAAE,CAAC,CAAC;IAAC,GAAG,EAAE,GAAG,CAAC;CAChB"}
 
+//// [/src/lib/b.d.ts] file written with same contents
+//// [/src/lib/b.d.ts.map] file written with same contents
+//// [/src/lib/c.d.ts] file written with same contents
+//// [/src/lib/c.d.ts.map] file written with same contents
 //// [/src/src/a.ts]
 export class B { prop = "hello"; }
 
diff --git a/tests/baselines/reference/tsbuild/emitDeclarationOnly/incremental-declaration-doesnt-change/only-dts-output-in-non-circular-imports-project-with-emitDeclarationOnly.js b/tests/baselines/reference/tsbuild/emitDeclarationOnly/incremental-declaration-doesnt-change/only-dts-output-in-non-circular-imports-project-with-emitDeclarationOnly.js
index 7facc60eef5..0eb46f39556 100644
--- a/tests/baselines/reference/tsbuild/emitDeclarationOnly/incremental-declaration-doesnt-change/only-dts-output-in-non-circular-imports-project-with-emitDeclarationOnly.js
+++ b/tests/baselines/reference/tsbuild/emitDeclarationOnly/incremental-declaration-doesnt-change/only-dts-output-in-non-circular-imports-project-with-emitDeclarationOnly.js
@@ -1,3 +1,4 @@
+//// [/src/lib/a.d.ts] file written with same contents
 //// [/src/lib/a.d.ts.map]
 {"version":3,"file":"a.d.ts","sourceRoot":"","sources":["../src/a.ts"],"names":[],"mappings":"AAAA,qBAAa,CAAC;IAAG,IAAI,SAAW;CAAE;AAGlC,MAAM,WAAW,CAAC;IAChB,CAAC,EAAE,CAAC,CAAC;CACN"}
 
diff --git a/tests/baselines/reference/tsbuild/inferredTypeFromTransitiveModule/incremental-declaration-changes/inferred-type-from-transitive-module.js b/tests/baselines/reference/tsbuild/inferredTypeFromTransitiveModule/incremental-declaration-changes/inferred-type-from-transitive-module.js
index 727875a5d40..e27d6055603 100644
--- a/tests/baselines/reference/tsbuild/inferredTypeFromTransitiveModule/incremental-declaration-changes/inferred-type-from-transitive-module.js
+++ b/tests/baselines/reference/tsbuild/inferredTypeFromTransitiveModule/incremental-declaration-changes/inferred-type-from-transitive-module.js
@@ -26,6 +26,9 @@ import { LazyAction } from './bundling';
 export declare const lazyBar: LazyAction<() => void, typeof import("./lazyIndex")>;
 
 
+//// [/src/obj/index.js] file written with same contents
+//// [/src/obj/lazyIndex.d.ts] file written with same contents
+//// [/src/obj/lazyIndex.js] file written with same contents
 //// [/src/obj/tsconfig.tsbuildinfo]
 {
   "program": {
diff --git a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/baseline-sectioned-sourcemaps.js b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/baseline-sectioned-sourcemaps.js
index de8f6f9b0db..0c1de645252 100644
--- a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/baseline-sectioned-sourcemaps.js
+++ b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/baseline-sectioned-sourcemaps.js
@@ -1,3 +1,6 @@
+//// [/src/first/bin/first-output.d.ts] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map.baseline.txt] file written with same contents
 //// [/src/first/bin/first-output.js]
 var s = "Hello, world";
 console.log(s);
diff --git a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/emitHelpers-in-all-projects.js b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/emitHelpers-in-all-projects.js
index 2c8eeceeac3..4049a658d5d 100644
--- a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/emitHelpers-in-all-projects.js
+++ b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/emitHelpers-in-all-projects.js
@@ -1,3 +1,6 @@
+//// [/src/first/bin/first-output.d.ts] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map.baseline.txt] file written with same contents
 //// [/src/first/bin/first-output.js]
 var __rest = (this && this.__rest) || function (s, e) {
     var t = {};
diff --git a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/emitHelpers-in-only-one-dependency-project.js b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/emitHelpers-in-only-one-dependency-project.js
index 80c79449ce1..91d63e81d93 100644
--- a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/emitHelpers-in-only-one-dependency-project.js
+++ b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/emitHelpers-in-only-one-dependency-project.js
@@ -1,3 +1,6 @@
+//// [/src/first/bin/first-output.d.ts] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map.baseline.txt] file written with same contents
 //// [/src/first/bin/first-output.js]
 var s = "Hello, world";
 console.log(s);
diff --git a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/multiple-emitHelpers-in-all-projects.js b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/multiple-emitHelpers-in-all-projects.js
index 9a1d94824d4..4ea169f5940 100644
--- a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/multiple-emitHelpers-in-all-projects.js
+++ b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/multiple-emitHelpers-in-all-projects.js
@@ -1,3 +1,6 @@
+//// [/src/first/bin/first-output.d.ts] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map.baseline.txt] file written with same contents
 //// [/src/first/bin/first-output.js]
 var __rest = (this && this.__rest) || function (s, e) {
     var t = {};
diff --git a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/multiple-emitHelpers-in-different-projects.js b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/multiple-emitHelpers-in-different-projects.js
index 5a6d733931e..ac94261ec5b 100644
--- a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/multiple-emitHelpers-in-different-projects.js
+++ b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/multiple-emitHelpers-in-different-projects.js
@@ -1,3 +1,6 @@
+//// [/src/first/bin/first-output.d.ts] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map.baseline.txt] file written with same contents
 //// [/src/first/bin/first-output.js]
 var __rest = (this && this.__rest) || function (s, e) {
     var t = {};
diff --git a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/multiple-prologues-in-all-projects.js b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/multiple-prologues-in-all-projects.js
index c8eae0ea272..a1075353f3e 100644
--- a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/multiple-prologues-in-all-projects.js
+++ b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/multiple-prologues-in-all-projects.js
@@ -1,3 +1,6 @@
+//// [/src/first/bin/first-output.d.ts] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map.baseline.txt] file written with same contents
 //// [/src/first/bin/first-output.js]
 "use strict";
 "myPrologue";
diff --git a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/multiple-prologues-in-different-projects.js b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/multiple-prologues-in-different-projects.js
index cbf38cf0642..75a66a9473f 100644
--- a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/multiple-prologues-in-different-projects.js
+++ b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/multiple-prologues-in-different-projects.js
@@ -1,3 +1,6 @@
+//// [/src/first/bin/first-output.d.ts] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map.baseline.txt] file written with same contents
 //// [/src/first/bin/first-output.js]
 "use strict";
 var s = "Hello, world";
diff --git a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/shebang-in-all-projects.js b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/shebang-in-all-projects.js
index b0c4c820ac2..66cbcb79b2c 100644
--- a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/shebang-in-all-projects.js
+++ b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/shebang-in-all-projects.js
@@ -1,3 +1,6 @@
+//// [/src/first/bin/first-output.d.ts] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map.baseline.txt] file written with same contents
 //// [/src/first/bin/first-output.js]
 #!someshebang first first_PART1
 var s = "Hello, world";
diff --git a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/shebang-in-only-one-dependency-project.js b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/shebang-in-only-one-dependency-project.js
index d89f565e375..4771fa447ef 100644
--- a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/shebang-in-only-one-dependency-project.js
+++ b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/shebang-in-only-one-dependency-project.js
@@ -1,3 +1,6 @@
+//// [/src/first/bin/first-output.d.ts] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map.baseline.txt] file written with same contents
 //// [/src/first/bin/first-output.js]
 var s = "Hello, world";
 console.log(s);
diff --git a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/strict-in-all-projects.js b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/strict-in-all-projects.js
index 5cf3ea7abd4..1e7436f9df8 100644
--- a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/strict-in-all-projects.js
+++ b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/strict-in-all-projects.js
@@ -1,3 +1,6 @@
+//// [/src/first/bin/first-output.d.ts] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map.baseline.txt] file written with same contents
 //// [/src/first/bin/first-output.js]
 "use strict";
 var s = "Hello, world";
diff --git a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/strict-in-one-dependency.js b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/strict-in-one-dependency.js
index 372ef671910..654b18ce483 100644
--- a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/strict-in-one-dependency.js
+++ b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/strict-in-one-dependency.js
@@ -1,3 +1,6 @@
+//// [/src/first/bin/first-output.d.ts] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map.baseline.txt] file written with same contents
 //// [/src/first/bin/first-output.js]
 var s = "Hello, world";
 console.log(s);
diff --git a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/stripInternal-jsdoc-style-comment-when-one-two-three-are-prepended-in-order.js b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/stripInternal-jsdoc-style-comment-when-one-two-three-are-prepended-in-order.js
index d9691fde1a8..6ec1100b4bd 100644
--- a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/stripInternal-jsdoc-style-comment-when-one-two-three-are-prepended-in-order.js
+++ b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/stripInternal-jsdoc-style-comment-when-one-two-three-are-prepended-in-order.js
@@ -2024,6 +2024,9 @@ declare class C {
 
 ======================================================================
 
+//// [/src/first/bin/first-output.d.ts] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map.baseline.txt] file written with same contents
 //// [/src/first/bin/first-output.js]
 var s = "Hello, world";
 console.log(s);
diff --git a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/stripInternal-jsdoc-style-comment.js b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/stripInternal-jsdoc-style-comment.js
index 38403c4693d..a21376924f6 100644
--- a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/stripInternal-jsdoc-style-comment.js
+++ b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/stripInternal-jsdoc-style-comment.js
@@ -1,3 +1,6 @@
+//// [/src/first/bin/first-output.d.ts] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map.baseline.txt] file written with same contents
 //// [/src/first/bin/first-output.js]
 var s = "Hello, world";
 console.log(s);
diff --git a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/stripInternal-jsdoc-style-with-comments-emit-enabled-when-one-two-three-are-prepended-in-order.js b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/stripInternal-jsdoc-style-with-comments-emit-enabled-when-one-two-three-are-prepended-in-order.js
index a48020f4ba7..d68b80c42a4 100644
--- a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/stripInternal-jsdoc-style-with-comments-emit-enabled-when-one-two-three-are-prepended-in-order.js
+++ b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/stripInternal-jsdoc-style-with-comments-emit-enabled-when-one-two-three-are-prepended-in-order.js
@@ -2124,6 +2124,9 @@ declare class C {
 
 ======================================================================
 
+//// [/src/first/bin/first-output.d.ts] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map.baseline.txt] file written with same contents
 //// [/src/first/bin/first-output.js]
 var s = "Hello, world";
 console.log(s);
diff --git a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/stripInternal-jsdoc-style-with-comments-emit-enabled.js b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/stripInternal-jsdoc-style-with-comments-emit-enabled.js
index 29ad265d6ab..b779dcffa53 100644
--- a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/stripInternal-jsdoc-style-with-comments-emit-enabled.js
+++ b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/stripInternal-jsdoc-style-with-comments-emit-enabled.js
@@ -1,3 +1,6 @@
+//// [/src/first/bin/first-output.d.ts] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map.baseline.txt] file written with same contents
 //// [/src/first/bin/first-output.js]
 var s = "Hello, world";
 console.log(s);
diff --git a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/stripInternal-when-one-two-three-are-prepended-in-order.js b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/stripInternal-when-one-two-three-are-prepended-in-order.js
index 08a0bffd148..f312697a726 100644
--- a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/stripInternal-when-one-two-three-are-prepended-in-order.js
+++ b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/stripInternal-when-one-two-three-are-prepended-in-order.js
@@ -2024,6 +2024,9 @@ declare class C {
 
 ======================================================================
 
+//// [/src/first/bin/first-output.d.ts] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map.baseline.txt] file written with same contents
 //// [/src/first/bin/first-output.js]
 var s = "Hello, world";
 console.log(s);
diff --git a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/stripInternal-with-comments-emit-enabled-when-one-two-three-are-prepended-in-order.js b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/stripInternal-with-comments-emit-enabled-when-one-two-three-are-prepended-in-order.js
index e17e3f05842..4ccb69a5a8d 100644
--- a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/stripInternal-with-comments-emit-enabled-when-one-two-three-are-prepended-in-order.js
+++ b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/stripInternal-with-comments-emit-enabled-when-one-two-three-are-prepended-in-order.js
@@ -2124,6 +2124,9 @@ declare class C {
 
 ======================================================================
 
+//// [/src/first/bin/first-output.d.ts] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map.baseline.txt] file written with same contents
 //// [/src/first/bin/first-output.js]
 var s = "Hello, world";
 console.log(s);
diff --git a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/stripInternal-with-comments-emit-enabled.js b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/stripInternal-with-comments-emit-enabled.js
index 29c643c43f5..b64f0367708 100644
--- a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/stripInternal-with-comments-emit-enabled.js
+++ b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/stripInternal-with-comments-emit-enabled.js
@@ -1,3 +1,6 @@
+//// [/src/first/bin/first-output.d.ts] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map.baseline.txt] file written with same contents
 //// [/src/first/bin/first-output.js]
 var s = "Hello, world";
 console.log(s);
diff --git a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/stripInternal.js b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/stripInternal.js
index e91c046c278..2fc43e90ec5 100644
--- a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/stripInternal.js
+++ b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/stripInternal.js
@@ -1,3 +1,6 @@
+//// [/src/first/bin/first-output.d.ts] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map.baseline.txt] file written with same contents
 //// [/src/first/bin/first-output.js]
 var s = "Hello, world";
 console.log(s);
diff --git a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/triple-slash-refs-in-all-projects.js b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/triple-slash-refs-in-all-projects.js
index a7e041fe565..0303c231a2d 100644
--- a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/triple-slash-refs-in-all-projects.js
+++ b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/triple-slash-refs-in-all-projects.js
@@ -1,3 +1,6 @@
+//// [/src/first/bin/first-output.d.ts] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map.baseline.txt] file written with same contents
 //// [/src/first/bin/first-output.js]
 var s = "Hello, world";
 console.log(s);
diff --git a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/triple-slash-refs-in-one-project.js b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/triple-slash-refs-in-one-project.js
index c34e752d808..d317b8f29b6 100644
--- a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/triple-slash-refs-in-one-project.js
+++ b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/triple-slash-refs-in-one-project.js
@@ -1,3 +1,6 @@
+//// [/src/first/bin/first-output.d.ts] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map.baseline.txt] file written with same contents
 //// [/src/first/bin/first-output.js]
 var s = "Hello, world";
 console.log(s);
diff --git a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/when-final-project-is-not-composite-but-uses-project-references.js b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/when-final-project-is-not-composite-but-uses-project-references.js
index eb117294ec4..126759e3719 100644
--- a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/when-final-project-is-not-composite-but-uses-project-references.js
+++ b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/when-final-project-is-not-composite-but-uses-project-references.js
@@ -1,3 +1,6 @@
+//// [/src/first/bin/first-output.d.ts] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map.baseline.txt] file written with same contents
 //// [/src/first/bin/first-output.js]
 var s = "Hello, world";
 console.log(s);
@@ -257,6 +260,9 @@ interface NoJsForHereEither {
 console.log(s);
 console.log(s);
 
+//// [/src/third/thirdjs/output/third-output.d.ts] file written with same contents
+//// [/src/third/thirdjs/output/third-output.d.ts.map] file written with same contents
+//// [/src/third/thirdjs/output/third-output.d.ts.map.baseline.txt] file written with same contents
 //// [/src/third/thirdjs/output/third-output.js]
 var s = "Hello, world";
 console.log(s);
diff --git a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/when-source-files-are-empty-in-the-own-file.js b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/when-source-files-are-empty-in-the-own-file.js
index d050ca2dd0c..a3b4c95b0f2 100644
--- a/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/when-source-files-are-empty-in-the-own-file.js
+++ b/tests/baselines/reference/tsbuild/outfile-concat/incremental-declaration-doesnt-change/when-source-files-are-empty-in-the-own-file.js
@@ -1,3 +1,6 @@
+//// [/src/first/bin/first-output.d.ts] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map] file written with same contents
+//// [/src/first/bin/first-output.d.ts.map.baseline.txt] file written with same contents
 //// [/src/first/bin/first-output.js]
 var s = "Hello, world";
 console.log(s);
diff --git a/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/emitHelpers-in-all-projects.js b/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/emitHelpers-in-all-projects.js
index f595aac7193..40ab1fa6dd0 100644
--- a/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/emitHelpers-in-all-projects.js
+++ b/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/emitHelpers-in-all-projects.js
@@ -1,3 +1,4 @@
+//// [/src/first/bin/first-output.d.ts] file written with same contents
 //// [/src/first/bin/first-output.d.ts.map]
 {"version":3,"file":"first-output.d.ts","sourceRoot":"","sources":["../first_PART1.ts","../first_part2.ts","../first_part3.ts"],"names":[],"mappings":"AAAA,UAAU,QAAQ;IACd,IAAI,EAAE,GAAG,CAAC;CACb;AAED,QAAA,MAAM,CAAC,iBAAiB,CAAC;AAEzB,UAAU,iBAAiB;IACvB,IAAI,EAAE,GAAG,CAAC;CACb;AAGD,iBAAS,uBAAuB,SAAM;AEXtC,iBAAS,CAAC,WAET"}
 
diff --git a/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/emitHelpers-in-only-one-dependency-project.js b/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/emitHelpers-in-only-one-dependency-project.js
index 65d56d99c99..95c8bdbb672 100644
--- a/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/emitHelpers-in-only-one-dependency-project.js
+++ b/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/emitHelpers-in-only-one-dependency-project.js
@@ -1,3 +1,4 @@
+//// [/src/first/bin/first-output.d.ts] file written with same contents
 //// [/src/first/bin/first-output.d.ts.map]
 {"version":3,"file":"first-output.d.ts","sourceRoot":"","sources":["../first_PART1.ts","../first_part2.ts","../first_part3.ts"],"names":[],"mappings":"AAAA,UAAU,QAAQ;IACd,IAAI,EAAE,GAAG,CAAC;CACb;AAED,QAAA,MAAM,CAAC,iBAAiB,CAAC;AAEzB,UAAU,iBAAiB;IACvB,IAAI,EAAE,GAAG,CAAC;CACb;AAGD,iBAAS,uBAAuB,SAE/B;AEbD,iBAAS,CAAC,WAET"}
 
diff --git a/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/multiple-emitHelpers-in-all-projects.js b/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/multiple-emitHelpers-in-all-projects.js
index 85a0007b0ff..d5a6f310b95 100644
--- a/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/multiple-emitHelpers-in-all-projects.js
+++ b/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/multiple-emitHelpers-in-all-projects.js
@@ -1,3 +1,4 @@
+//// [/src/first/bin/first-output.d.ts] file written with same contents
 //// [/src/first/bin/first-output.d.ts.map]
 {"version":3,"file":"first-output.d.ts","sourceRoot":"","sources":["../first_PART1.ts","../first_part2.ts","../first_part3.ts"],"names":[],"mappings":"AAAA,UAAU,QAAQ;IACd,IAAI,EAAE,GAAG,CAAC;CACb;AAED,QAAA,MAAM,CAAC,iBAAiB,CAAC;AAEzB,UAAU,iBAAiB;IACvB,IAAI,EAAE,GAAG,CAAC;CACb;AAGD,iBAAS,uBAAuB,SAAM;AEXtC,iBAAS,CAAC,WAET;AACD,iBAAS,sBAAsB,CAAC,GAAG,GAAG,MAAM,EAAE,QAAK"}
 
diff --git a/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/multiple-emitHelpers-in-different-projects.js b/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/multiple-emitHelpers-in-different-projects.js
index ea399602b00..c7426fd026e 100644
--- a/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/multiple-emitHelpers-in-different-projects.js
+++ b/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/multiple-emitHelpers-in-different-projects.js
@@ -1,3 +1,4 @@
+//// [/src/first/bin/first-output.d.ts] file written with same contents
 //// [/src/first/bin/first-output.d.ts.map]
 {"version":3,"file":"first-output.d.ts","sourceRoot":"","sources":["../first_PART1.ts","../first_part2.ts","../first_part3.ts"],"names":[],"mappings":"AAAA,UAAU,QAAQ;IACd,IAAI,EAAE,GAAG,CAAC;CACb;AAED,QAAA,MAAM,CAAC,iBAAiB,CAAC;AAEzB,UAAU,iBAAiB;IACvB,IAAI,EAAE,GAAG,CAAC;CACb;AAGD,iBAAS,uBAAuB,SAAM;AEXtC,iBAAS,CAAC,WAET"}
 
diff --git a/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/multiple-prologues-in-all-projects.js b/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/multiple-prologues-in-all-projects.js
index 948b6e8233a..e31929fda61 100644
--- a/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/multiple-prologues-in-all-projects.js
+++ b/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/multiple-prologues-in-all-projects.js
@@ -1,3 +1,4 @@
+//// [/src/first/bin/first-output.d.ts] file written with same contents
 //// [/src/first/bin/first-output.d.ts.map]
 {"version":3,"file":"first-output.d.ts","sourceRoot":"","sources":["../first_PART1.ts","../first_part2.ts","../first_part3.ts"],"names":[],"mappings":"AAEA,UAAU,QAAQ;IACd,IAAI,EAAE,GAAG,CAAC;CACb;AAED,QAAA,MAAM,CAAC,iBAAiB,CAAC;AAEzB,UAAU,iBAAiB;IACvB,IAAI,EAAE,GAAG,CAAC;CACb;AEVD,iBAAS,CAAC,WAET"}
 
diff --git a/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/multiple-prologues-in-different-projects.js b/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/multiple-prologues-in-different-projects.js
index f16a24a3fb8..441559cdf45 100644
--- a/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/multiple-prologues-in-different-projects.js
+++ b/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/multiple-prologues-in-different-projects.js
@@ -1,3 +1,4 @@
+//// [/src/first/bin/first-output.d.ts] file written with same contents
 //// [/src/first/bin/first-output.d.ts.map]
 {"version":3,"file":"first-output.d.ts","sourceRoot":"","sources":["../first_PART1.ts","../first_part2.ts","../first_part3.ts"],"names":[],"mappings":"AACA,UAAU,QAAQ;IACd,IAAI,EAAE,GAAG,CAAC;CACb;AAED,QAAA,MAAM,CAAC,iBAAiB,CAAC;AAEzB,UAAU,iBAAiB;IACvB,IAAI,EAAE,GAAG,CAAC;CACb;AETD,iBAAS,CAAC,WAET"}
 
diff --git a/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/strict-in-all-projects.js b/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/strict-in-all-projects.js
index 7e96f8915da..00e04704f80 100644
--- a/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/strict-in-all-projects.js
+++ b/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/strict-in-all-projects.js
@@ -1,3 +1,4 @@
+//// [/src/first/bin/first-output.d.ts] file written with same contents
 //// [/src/first/bin/first-output.d.ts.map]
 {"version":3,"file":"first-output.d.ts","sourceRoot":"","sources":["../first_PART1.ts","../first_part2.ts","../first_part3.ts"],"names":[],"mappings":"AACA,UAAU,QAAQ;IACd,IAAI,EAAE,GAAG,CAAC;CACb;AAED,QAAA,MAAM,CAAC,iBAAiB,CAAC;AAEzB,UAAU,iBAAiB;IACvB,IAAI,EAAE,GAAG,CAAC;CACb;AETD,iBAAS,CAAC,WAET"}
 
diff --git a/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/strict-in-one-dependency.js b/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/strict-in-one-dependency.js
index ebb00b3b84c..59205be8064 100644
--- a/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/strict-in-one-dependency.js
+++ b/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/strict-in-one-dependency.js
@@ -1,3 +1,4 @@
+//// [/src/first/bin/first-output.d.ts] file written with same contents
 //// [/src/first/bin/first-output.d.ts.map]
 {"version":3,"file":"first-output.d.ts","sourceRoot":"","sources":["../first_PART1.ts","../first_part2.ts","../first_part3.ts"],"names":[],"mappings":"AACA,UAAU,QAAQ;IACd,IAAI,EAAE,GAAG,CAAC;CACb;AAED,QAAA,MAAM,CAAC,iBAAiB,CAAC;AAEzB,UAAU,iBAAiB;IACvB,IAAI,EAAE,GAAG,CAAC;CACb;AETD,iBAAS,CAAC,WAET"}
 
diff --git a/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/stripInternal-jsdoc-style-comment-when-one-two-three-are-prepended-in-order.js b/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/stripInternal-jsdoc-style-comment-when-one-two-three-are-prepended-in-order.js
index f3c8dccc27a..887c845e48b 100644
--- a/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/stripInternal-jsdoc-style-comment-when-one-two-three-are-prepended-in-order.js
+++ b/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/stripInternal-jsdoc-style-comment-when-one-two-three-are-prepended-in-order.js
@@ -1072,6 +1072,7 @@ declare class C {
 
 ======================================================================
 
+//// [/src/first/bin/first-output.d.ts] file written with same contents
 //// [/src/first/bin/first-output.d.ts.map]
 {"version":3,"file":"first-output.d.ts","sourceRoot":"","sources":["../first_PART1.ts","../first_part2.ts","../first_part3.ts"],"names":[],"mappings":"AAAA,UAAU,QAAQ;IACd,IAAI,EAAE,GAAG,CAAC;CACb;AAED,QAAA,MAAM,CAAC,iBAAiB,CAAC;AAEzB,UAAU,iBAAiB;IACvB,IAAI,EAAE,GAAG,CAAC;CACb;AERD,iBAAS,CAAC,WAET"}
 
@@ -1205,6 +1206,8 @@ sourceFile:../first_part3.ts
 ---
 >>>//# sourceMappingURL=first-output.d.ts.map
 
+//// [/src/first/bin/first-output.js] file written with same contents
+//// [/src/first/bin/first-output.js.map] file written with same contents
 //// [/src/first/bin/first-output.js.map.baseline.txt]
 ===================================================================
 JsFile: first-output.js
diff --git a/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/stripInternal-jsdoc-style-comment.js b/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/stripInternal-jsdoc-style-comment.js
index d91fca25e4c..3d722243740 100644
--- a/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/stripInternal-jsdoc-style-comment.js
+++ b/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/stripInternal-jsdoc-style-comment.js
@@ -1,3 +1,4 @@
+//// [/src/first/bin/first-output.d.ts] file written with same contents
 //// [/src/first/bin/first-output.d.ts.map]
 {"version":3,"file":"first-output.d.ts","sourceRoot":"","sources":["../first_PART1.ts","../first_part2.ts","../first_part3.ts"],"names":[],"mappings":"AAAA,UAAU,QAAQ;IACd,IAAI,EAAE,GAAG,CAAC;CACb;AAED,QAAA,MAAM,CAAC,iBAAiB,CAAC;AAEzB,UAAU,iBAAiB;IACvB,IAAI,EAAE,GAAG,CAAC;CACb;AERD,iBAAS,CAAC,WAET"}
 
@@ -131,6 +132,8 @@ sourceFile:../first_part3.ts
 ---
 >>>//# sourceMappingURL=first-output.d.ts.map
 
+//// [/src/first/bin/first-output.js] file written with same contents
+//// [/src/first/bin/first-output.js.map] file written with same contents
 //// [/src/first/bin/first-output.js.map.baseline.txt]
 ===================================================================
 JsFile: first-output.js
diff --git a/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/stripInternal-when-one-two-three-are-prepended-in-order.js b/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/stripInternal-when-one-two-three-are-prepended-in-order.js
index 4cc32daee93..5f9b856f99c 100644
--- a/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/stripInternal-when-one-two-three-are-prepended-in-order.js
+++ b/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/stripInternal-when-one-two-three-are-prepended-in-order.js
@@ -1072,6 +1072,7 @@ declare class C {
 
 ======================================================================
 
+//// [/src/first/bin/first-output.d.ts] file written with same contents
 //// [/src/first/bin/first-output.d.ts.map]
 {"version":3,"file":"first-output.d.ts","sourceRoot":"","sources":["../first_PART1.ts","../first_part2.ts","../first_part3.ts"],"names":[],"mappings":"AAAA,UAAU,QAAQ;IACd,IAAI,EAAE,GAAG,CAAC;CACb;AAED,QAAA,MAAM,CAAC,iBAAiB,CAAC;AAEzB,UAAU,iBAAiB;IACvB,IAAI,EAAE,GAAG,CAAC;CACb;AERD,iBAAS,CAAC,WAET"}
 
@@ -1205,6 +1206,8 @@ sourceFile:../first_part3.ts
 ---
 >>>//# sourceMappingURL=first-output.d.ts.map
 
+//// [/src/first/bin/first-output.js] file written with same contents
+//// [/src/first/bin/first-output.js.map] file written with same contents
 //// [/src/first/bin/first-output.js.map.baseline.txt]
 ===================================================================
 JsFile: first-output.js
diff --git a/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/stripInternal-with-comments-emit-enabled-when-one-two-three-are-prepended-in-order.js b/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/stripInternal-with-comments-emit-enabled-when-one-two-three-are-prepended-in-order.js
index b52187573a3..dcaa317a0d2 100644
--- a/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/stripInternal-with-comments-emit-enabled-when-one-two-three-are-prepended-in-order.js
+++ b/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/stripInternal-with-comments-emit-enabled-when-one-two-three-are-prepended-in-order.js
@@ -1072,6 +1072,7 @@ declare class C {
 
 ======================================================================
 
+//// [/src/first/bin/first-output.d.ts] file written with same contents
 //// [/src/first/bin/first-output.d.ts.map]
 {"version":3,"file":"first-output.d.ts","sourceRoot":"","sources":["../first_PART1.ts","../first_part2.ts","../first_part3.ts"],"names":[],"mappings":"AAAA,UAAU,QAAQ;IACd,IAAI,EAAE,GAAG,CAAC;CACb;AAED,QAAA,MAAM,CAAC,iBAAiB,CAAC;AAEzB,UAAU,iBAAiB;IACvB,IAAI,EAAE,GAAG,CAAC;CACb;AERD,iBAAS,CAAC,WAET"}
 
@@ -1205,6 +1206,8 @@ sourceFile:../first_part3.ts
 ---
 >>>//# sourceMappingURL=first-output.d.ts.map
 
+//// [/src/first/bin/first-output.js] file written with same contents
+//// [/src/first/bin/first-output.js.map] file written with same contents
 //// [/src/first/bin/first-output.js.map.baseline.txt]
 ===================================================================
 JsFile: first-output.js
diff --git a/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/stripInternal-with-comments-emit-enabled.js b/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/stripInternal-with-comments-emit-enabled.js
index 65791f61896..93681166f46 100644
--- a/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/stripInternal-with-comments-emit-enabled.js
+++ b/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/stripInternal-with-comments-emit-enabled.js
@@ -1,3 +1,4 @@
+//// [/src/first/bin/first-output.d.ts] file written with same contents
 //// [/src/first/bin/first-output.d.ts.map]
 {"version":3,"file":"first-output.d.ts","sourceRoot":"","sources":["../first_PART1.ts","../first_part2.ts","../first_part3.ts"],"names":[],"mappings":"AAAA,UAAU,QAAQ;IACd,IAAI,EAAE,GAAG,CAAC;CACb;AAED,QAAA,MAAM,CAAC,iBAAiB,CAAC;AAEzB,UAAU,iBAAiB;IACvB,IAAI,EAAE,GAAG,CAAC;CACb;AERD,iBAAS,CAAC,WAET"}
 
@@ -131,6 +132,8 @@ sourceFile:../first_part3.ts
 ---
 >>>//# sourceMappingURL=first-output.d.ts.map
 
+//// [/src/first/bin/first-output.js] file written with same contents
+//// [/src/first/bin/first-output.js.map] file written with same contents
 //// [/src/first/bin/first-output.js.map.baseline.txt]
 ===================================================================
 JsFile: first-output.js
diff --git a/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/stripInternal.js b/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/stripInternal.js
index 75a1379fe9f..832ea5e5de0 100644
--- a/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/stripInternal.js
+++ b/tests/baselines/reference/tsbuild/outfile-concat/incremental-headers-change-without-dts-changes/stripInternal.js
@@ -1,3 +1,4 @@
+//// [/src/first/bin/first-output.d.ts] file written with same contents
 //// [/src/first/bin/first-output.d.ts.map]
 {"version":3,"file":"first-output.d.ts","sourceRoot":"","sources":["../first_PART1.ts","../first_part2.ts","../first_part3.ts"],"names":[],"mappings":"AAAA,UAAU,QAAQ;IACd,IAAI,EAAE,GAAG,CAAC;CACb;AAED,QAAA,MAAM,CAAC,iBAAiB,CAAC;AAEzB,UAAU,iBAAiB;IACvB,IAAI,EAAE,GAAG,CAAC;CACb;AERD,iBAAS,CAAC,WAET"}
 
@@ -131,6 +132,8 @@ sourceFile:../first_part3.ts
 ---
 >>>//# sourceMappingURL=first-output.d.ts.map
 
+//// [/src/first/bin/first-output.js] file written with same contents
+//// [/src/first/bin/first-output.js.map] file written with same contents
 //// [/src/first/bin/first-output.js.map.baseline.txt]
 ===================================================================
 JsFile: first-output.js
diff --git a/tests/baselines/reference/tsbuild/sample1/incremental-declaration-changes/sample.js b/tests/baselines/reference/tsbuild/sample1/incremental-declaration-changes/sample.js
index f1124ae44eb..0a2ce56cb64 100644
--- a/tests/baselines/reference/tsbuild/sample1/incremental-declaration-changes/sample.js
+++ b/tests/baselines/reference/tsbuild/sample1/incremental-declaration-changes/sample.js
@@ -207,6 +207,10 @@ export class someClass { }
   "version": "FakeTSVersion"
 }
 
+//// [/src/logic/index.d.ts] file written with same contents
+//// [/src/logic/index.js] file written with same contents
+//// [/src/logic/index.js.map] file written with same contents
+//// [/src/logic/index.js.map.baseline.txt] file written with same contents
 //// [/src/logic/tsconfig.tsbuildinfo]
 {
   "program": {
@@ -257,6 +261,8 @@ export class someClass { }
   "version": "FakeTSVersion"
 }
 
+//// [/src/tests/index.d.ts] file written with same contents
+//// [/src/tests/index.js] file written with same contents
 //// [/src/tests/tsconfig.tsbuildinfo]
 {
   "program": {
diff --git a/tests/baselines/reference/tsbuild/sample1/incremental-declaration-changes/when-declaration-option-changes.js b/tests/baselines/reference/tsbuild/sample1/incremental-declaration-changes/when-declaration-option-changes.js
index 8a87cafe69e..b3c22649712 100644
--- a/tests/baselines/reference/tsbuild/sample1/incremental-declaration-changes/when-declaration-option-changes.js
+++ b/tests/baselines/reference/tsbuild/sample1/incremental-declaration-changes/when-declaration-option-changes.js
@@ -2,12 +2,14 @@
 export declare const World = "hello";
 
 
+//// [/src/core/anotherModule.js] file written with same contents
 //// [/src/core/index.d.ts]
 export declare const someString: string;
 export declare function leftPad(s: string, n: number): string;
 export declare function multiply(a: number, b: number): number;
 
 
+//// [/src/core/index.js] file written with same contents
 //// [/src/core/tsconfig.json]
 {
     "compilerOptions": {
diff --git a/tests/baselines/reference/tsbuild/sample1/incremental-declaration-changes/when-esModuleInterop-option-changes.js b/tests/baselines/reference/tsbuild/sample1/incremental-declaration-changes/when-esModuleInterop-option-changes.js
index ce9044faa05..a701b09575a 100644
--- a/tests/baselines/reference/tsbuild/sample1/incremental-declaration-changes/when-esModuleInterop-option-changes.js
+++ b/tests/baselines/reference/tsbuild/sample1/incremental-declaration-changes/when-esModuleInterop-option-changes.js
@@ -1,3 +1,4 @@
+//// [/src/tests/index.d.ts] file written with same contents
 //// [/src/tests/index.js]
 "use strict";
 var __importStar = (this && this.__importStar) || function (mod) {
diff --git a/tests/baselines/reference/tsbuild/sample1/incremental-declaration-changes/when-logic-config-changes-declaration-dir.js b/tests/baselines/reference/tsbuild/sample1/incremental-declaration-changes/when-logic-config-changes-declaration-dir.js
index 13d6ef5c3ba..701737ec3b5 100644
--- a/tests/baselines/reference/tsbuild/sample1/incremental-declaration-changes/when-logic-config-changes-declaration-dir.js
+++ b/tests/baselines/reference/tsbuild/sample1/incremental-declaration-changes/when-logic-config-changes-declaration-dir.js
@@ -4,6 +4,9 @@ import * as mod from '../core/anotherModule';
 export declare const m: typeof mod;
 
 
+//// [/src/logic/index.js] file written with same contents
+//// [/src/logic/index.js.map] file written with same contents
+//// [/src/logic/index.js.map.baseline.txt] file written with same contents
 //// [/src/logic/tsconfig.json]
 {
     "compilerOptions": {
@@ -71,6 +74,8 @@ export declare const m: typeof mod;
   "version": "FakeTSVersion"
 }
 
+//// [/src/tests/index.d.ts] file written with same contents
+//// [/src/tests/index.js] file written with same contents
 //// [/src/tests/tsconfig.tsbuildinfo]
 {
   "program": {
diff --git a/tests/baselines/reference/tsbuild/sample1/incremental-declaration-doesnt-change/sample.js b/tests/baselines/reference/tsbuild/sample1/incremental-declaration-doesnt-change/sample.js
index 82e64bc9330..658377ce3a3 100644
--- a/tests/baselines/reference/tsbuild/sample1/incremental-declaration-doesnt-change/sample.js
+++ b/tests/baselines/reference/tsbuild/sample1/incremental-declaration-doesnt-change/sample.js
@@ -1,3 +1,6 @@
+//// [/src/core/index.d.ts] file written with same contents
+//// [/src/core/index.d.ts.map] file written with same contents
+//// [/src/core/index.d.ts.map.baseline.txt] file written with same contents
 //// [/src/core/index.js]
 "use strict";
 exports.__esModule = true;