diff --git a/.gitignore b/.gitignore
index 8b6bf90..b14e7ba 100644
--- a/.gitignore
+++ b/.gitignore
@@ -22,6 +22,12 @@ playwright-report/
 .env
 .env.local
 .env.*.local
+# An editor swap file of an ignored file is NOT itself ignored: .env.swp does
+# not match .env, and vim writes the buffer's contents into it.
+*.swp
+*.swo
+*~
+.*.sw[a-p]
 
 # database dumps & backups — but never the Prisma migrations, which are source
 backups/