diff --git a/apps/loopover-miner-ui/.prettierignore b/apps/loopover-miner-ui/.prettierignore
index 7862a2a5e..75dbf07fc 100644
--- a/apps/loopover-miner-ui/.prettierignore
+++ b/apps/loopover-miner-ui/.prettierignore
@@ -4,3 +4,5 @@ dist
 .vinxi
 package-lock.json
 routeTree.gen.ts
+# Locally generated coverage reports (vitest --coverage) -- never formatter input.
+coverage
diff --git a/apps/loopover-ui/.prettierignore b/apps/loopover-ui/.prettierignore
index 0638e2b4d..576470674 100644
--- a/apps/loopover-ui/.prettierignore
+++ b/apps/loopover-ui/.prettierignore
@@ -12,3 +12,5 @@ public/openapi.json
 # <CodeBlock code={`...`}> attributes, destroying embedded YAML/compose indentation (#8182 fallout,
 # repaired once already). Docs mdx is deliberately formatter-free.
 content/docs
+# Locally generated coverage reports (vitest --coverage) -- never formatter input.
+coverage
diff --git a/packages/loopover-ui-kit/.prettierignore b/packages/loopover-ui-kit/.prettierignore
index 26057e469..477d7e0bd 100644
--- a/packages/loopover-ui-kit/.prettierignore
+++ b/packages/loopover-ui-kit/.prettierignore
@@ -1,3 +1,5 @@
 node_modules
 dist
 CHANGELOG.md
+# Locally generated coverage reports (vitest --coverage) -- never formatter input.
+coverage