diff --git a/src/validations.test.ts b/src/validations.test.ts
index 926b148..c305104 100644
--- a/src/validations.test.ts
+++ b/src/validations.test.ts
@@ -1,18 +1,24 @@
 import {canBeConvertedToPDF} from './validations';
 
-describe('canBeConvertedToPDF', () => {
-  it.each`
-    filename        | expected
-    ${'image.jpg'}  | ${false}
-    ${'image.mp4'}  | ${false}
-    ${'image.mp3'}  | ${false}
-    ${'image.wav'}  | ${false}
-    ${'image.chm'}  | ${false}
-    ${'image.gdoc'} | ${false}
-    ${'image.dwg'}  | ${false}
-    ${'image.docx'} | ${true}
-    ${'image.pdf'}  | ${true}
-  `('should return $expected for filename $filename', ({filename, expected}) => {
-    expect(canBeConvertedToPDF(filename)).toEqual(expected);
-  });
+it.each`
+  filename
+  ${'document.docx'}
+  ${'document.pdf'}
+`('should return true for supported filename $filename', ({filename}) => {
+  expect(canBeConvertedToPDF(filename)).toEqual(true);
+});
+
+it.each`
+  filename
+  ${'project.mpp'}
+  ${'email.msg'}
+  ${'image.jpg'}
+  ${'video.mp4'}
+  ${'audio.mp3'}
+  ${'sound.wav'}
+  ${'help.chm'}
+  ${'google-doc.gdoc'}
+  ${'drawing.dwg'}
+`('should return false for unsupported filename $filename', ({filename}) => {
+  expect(canBeConvertedToPDF(filename)).toEqual(false);
 });
diff --git a/src/validations.ts b/src/validations.ts
index 2da7165..b8887d3 100644
--- a/src/validations.ts
+++ b/src/validations.ts
@@ -10,6 +10,8 @@ const UNSUPPORTED_FILE_EXTENSIONS = [
   '.gslides',
   '.zip',
   '.dwg',
+  '.msg',
+  '.mpp',
 ];
 
 export function canBeConvertedToPDF(filename: string): boolean {