diff --git a/__tests__/fixtures/projects/back-end/.eslintrc.json b/__tests__/fixtures/projects/back-end/.eslintrc.json
index c0830bb..2c97e0b 100644
--- a/__tests__/fixtures/projects/back-end/.eslintrc.json
+++ b/__tests__/fixtures/projects/back-end/.eslintrc.json
@@ -1,4 +1,5 @@
 {
+  "root": true,
   "rules": {
     "max-params": [
       "error",
diff --git a/__tests__/runEslintWithConfigFile.test.js b/__tests__/runEslintWithConfigFile.test.js
index 60a4841..6f3e571 100644
--- a/__tests__/runEslintWithConfigFile.test.js
+++ b/__tests__/runEslintWithConfigFile.test.js
@@ -23,7 +23,7 @@ describe('Running eslint', () => {
         'eslint',
         '-f', 'json',
         '--no-inline-config',
-        '--ext', '.js, .jsx',
+        '--ext', '.ts, .tsx, .js, .jsx',
         '--no-error-on-unmatched-pattern',
         '-c', '.eslintrc.json',
         '.'
@@ -49,7 +49,7 @@ describe('Running eslint', () => {
         'eslint',
         '-f', 'json',
         '--no-inline-config',
-        '--ext', '.js, .jsx',
+        '--ext', '.ts, .tsx, .js, .jsx',
         '--no-error-on-unmatched-pattern',
         '-c', '.eslintrc.json',
         '.'
@@ -73,7 +73,7 @@ describe('Running eslint', () => {
         'eslint',
         '-f', 'json',
         '--no-inline-config',
-        '--ext', '.js, .jsx',
+        '--ext', '.ts, .tsx, .js, .jsx',
         '--no-error-on-unmatched-pattern',
         '-c', '.eslintrc.json',
         '.'
@@ -96,7 +96,7 @@ describe('Running eslint', () => {
         'eslint',
         '-f', 'json',
         '--no-inline-config',
-        '--ext', '.js, .jsx',
+        '--ext', '.ts, .tsx, .js, .jsx',
         '--no-error-on-unmatched-pattern',
         '-c', '.eslintrc.json',
         '.'
@@ -118,7 +118,7 @@ describe('Running eslint', () => {
       [
         'eslint',
         '-f', 'json',
-        '--ext', '.js, .jsx',
+        '--ext', '.ts, .tsx, .js, .jsx',
         '--no-error-on-unmatched-pattern',
         '-c', '.eslintrc.json',
         '.'
diff --git a/dist/index.js b/dist/index.js
index a088db8..fb8ac9c 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -4745,7 +4745,7 @@ const runEslintWithConfigFile = (file) => {
   const args = [
     'eslint',
     '-f', 'json',
-    '--ext', '.js, .jsx',
+    '--ext', '.ts, .tsx, .js, .jsx',
     '--no-error-on-unmatched-pattern',
     '-c', path.basename(file),
     '.',
@@ -4762,7 +4762,7 @@ const runEslintWithConfigFile = (file) => {
 
   logProcessConclusion(eslintProcess);
 
-  return { status: eslintProcess.status , outcomes };
+  return { status: eslintProcess.status, outcomes };
 };
 
 module.exports = runEslintWithConfigFile;
diff --git a/runEslintWithConfigFile.js b/runEslintWithConfigFile.js
index 40e74e7..0eb8761 100644
--- a/runEslintWithConfigFile.js
+++ b/runEslintWithConfigFile.js
@@ -11,7 +11,7 @@ const runEslintWithConfigFile = (file) => {
   const args = [
     'eslint',
     '-f', 'json',
-    '--ext', '.js, .jsx',
+    '--ext', '.ts, .tsx, .js, .jsx',
     '--no-error-on-unmatched-pattern',
     '-c', path.basename(file),
     '.',
@@ -28,7 +28,7 @@ const runEslintWithConfigFile = (file) => {
 
   logProcessConclusion(eslintProcess);
 
-  return { status: eslintProcess.status , outcomes };
+  return { status: eslintProcess.status, outcomes };
 };
 
 module.exports = runEslintWithConfigFile;