diff --git a/.prettierignore b/.prettierignore
index 0318d666e9..e86c7aa505 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -1,2 +1,5 @@
 package.json
 packages/babel-preset-env/data
+packages/*/test/fixtures/**/input.*
+packages/*/test/fixtures/**/exec.*
+packages/*/test/fixtures/**/output.*