diff --git a/.gitignore b/.gitignore
index f2dbdb60..77ed15aa 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,6 +6,7 @@
 /vendor
 *.map
 backstop_data
+.phpunit.result.cache
 
 # Allow local environment overrides.
 .wp-env.override.json