diff --git a/README.md b/README.md
index 236bf5b..c2dfb40 100644
--- a/README.md
+++ b/README.md
@@ -74,12 +74,12 @@ jobs:
     name: Lint flutter code
     steps:
     - name: Checkout code
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
     - name: Set up Flutter
-      uses: subosito/flutter-action@v1
+      uses: subosito/flutter-action@v2
     - run: flutter pub get
     - name: Analyze Flutter
-      uses: ValentinVignal/action-dart-analyze@v0.13
+      uses: ValentinVignal/action-dart-analyze@v0.14
       with:
         fail-on: 'warning'
 ```
diff --git a/dist/index.js b/dist/index.js
index 3056846..eff50b5 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -16551,7 +16551,6 @@ function format(params) {
         const lines = output.trim().split(/\r?\n/);
         const errLines = errOutputs.trim().split(/\r?\n/);
         const fileNotFormatted = new Set();
-        const currentWorkingDirectory = process.cwd();
         for (const line of [...lines, ...errLines]) {
             if (!line.startsWith('Changed')) {
                 continue;
@@ -16562,7 +16561,7 @@ function format(params) {
             if (params.ignoredFiles.has(file)) {
                 continue;
             }
-            if (params.modifiedFiles.has(path.join(currentWorkingDirectory, ActionOptions_1.actionOptions.workingDirectory, file))) {
+            if (params.modifiedFiles.has(path.join(ActionOptions_1.actionOptions.workingDirectory, file))) {
                 fileNotFormatted.add(file);
                 console.log(`::warning file=${file}:: ${file} is not formatted`);
             }
@@ -17175,7 +17174,7 @@ const utils_1 = __nccwpck_require__(3030);
 const path_1 = __importDefault(__nccwpck_require__(5622));
 const ActionOptions_1 = __nccwpck_require__(3615);
 /**
- * Modified lines chunk of a file
+ * Modified lines chunk of a file.
  */
 class FileLines {
     constructor(params) {
@@ -17315,6 +17314,8 @@ class ModifiedFiles {
             const files = yield this.getGithubFiles();
             for (const file of files) {
                 this.files.set(path_1.default.join(process.env.GITHUB_WORKSPACE, file.filename), new ModifiedFile(file));
+                const modifiedFile = new ModifiedFile(file);
+                this.files.set(modifiedFile.name, modifiedFile);
             }
             this._resolveInit(true);
         });
@@ -17360,10 +17361,12 @@ class ModifiedFiles {
         });
     }
     /**
-     * Check whether a file is modified
+     * Check whether a file is modified.
+     *
+     * This needs to be the absolute path of the file (`'/home/runner/work/...'`).
      *
      * @param fileName
-     * @returns true if fileName is a modified file
+     * @returns `true` if {@link fileName} is a modified file.
      */
     has(fileName) {
         return this.files.has(fileName);
diff --git a/src/format/Format.test.ts b/src/format/Format.test.ts
index c58ff21..0b52b97 100644
--- a/src/format/Format.test.ts
+++ b/src/format/Format.test.ts
@@ -1,9 +1,3 @@
-const mockPath = {
-  join: jest.fn(),
-};
-
-jest.mock('path', () => mockPath);
-
 const mockActionOptions = {
   actionOptions: {} as ActionOptions,
 };
@@ -31,7 +25,7 @@ describe('Format', () => {
   it('should concatenate the cwd to files from the format command to compare them with the modified files', async () => {
     mockActionOptions.actionOptions = {
       format: true,
-      workingDirectory: 'actionOptionWorkingDirectory',
+      workingDirectory: 'cwd/actionOptionWorkingDirectory',
       failOn: FailOnEnum.Format,
     } as ActionOptions;
     const ignoredFiles: Partial<IgnoredFiles> = {
@@ -55,8 +49,6 @@ describe('Format', () => {
       return ['cwd/actionOptionWorkingDirectory/lib/file_0.dart', 'cwd/actionOptionWorkingDirectory/lib/file_1.dart'].includes(file);
     });
 
-    jest.spyOn(process, 'cwd').mockReturnValue('cwd');
-    mockPath.join.mockImplementation((...args: string[]) => args.join('/'));
 
     const result = await format({
       modifiedFiles: modifiedFiles as ModifiedFiles,
diff --git a/src/format/Format.ts b/src/format/Format.ts
index bb882b6..427815f 100644
--- a/src/format/Format.ts
+++ b/src/format/Format.ts
@@ -40,7 +40,6 @@ export async function format(params: { modifiedFiles: ModifiedFiles, ignoredFile
   const lines = output.trim().split(/\r?\n/);
   const errLines = errOutputs.trim().split(/\r?\n/);
   const fileNotFormatted = new Set<string>();
-  const currentWorkingDirectory = process.cwd();
 
   for (const line of [...lines, ...errLines]) {
     if (!line.startsWith('Changed')) {
@@ -53,7 +52,7 @@ export async function format(params: { modifiedFiles: ModifiedFiles, ignoredFile
     if (params.ignoredFiles.has(file)) {
       continue;
     }
-    if (params.modifiedFiles.has(path.join(currentWorkingDirectory, actionOptions.workingDirectory, file))) {
+    if (params.modifiedFiles.has(path.join(actionOptions.workingDirectory, file))) {
       fileNotFormatted.add(file);
       console.log(`::warning file=${file}:: ${file} is not formatted`);
     }
diff --git a/src/utils/ModifiedFiles.ts b/src/utils/ModifiedFiles.ts
index 68e4194..2e3e043 100644
--- a/src/utils/ModifiedFiles.ts
+++ b/src/utils/ModifiedFiles.ts
@@ -11,7 +11,7 @@ interface FileLinesInterface {
 }
 
 /**
- * Modified lines chunk of a file
+ * Modified lines chunk of a file.
  */
 class FileLines {
   readonly start: number;
@@ -37,6 +37,9 @@ export interface ModifiedFileInterface {
  * A modified file
  */
 class ModifiedFile {
+  /**
+   * The file name from the root directory (`'lib/src/...'`).
+   */
   readonly name: string;
   readonly deletions: FileLines[];
   readonly additions: FileLines[];
@@ -182,6 +185,8 @@ export class ModifiedFiles {
     const files = await this.getGithubFiles();
     for (const file of files) {
       this.files.set(path.join(process.env.GITHUB_WORKSPACE!, file.filename), new ModifiedFile(file));
+      const modifiedFile = new ModifiedFile(file);
+      this.files.set(modifiedFile.name, modifiedFile);
     }
     this._resolveInit(true);
   }
@@ -234,10 +239,12 @@ export class ModifiedFiles {
   }
 
   /**
-   * Check whether a file is modified
-   * 
+   * Check whether a file is modified.
+   *
+   * This needs to be the absolute path of the file (`'/home/runner/work/...'`).
+   *
    * @param fileName 
-   * @returns true if fileName is a modified file
+   * @returns `true` if {@link fileName} is a modified file.
    */
   public has(fileName: string): boolean {
     return this.files.has(fileName);