diff --git a/.editorconfig b/.editorconfig
index be14939ddb4..5425f0db475 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -37,3 +37,7 @@ indent_size = 2
 [package.json]
 indent_style = space
 indent_size = 2
+
+# Oxlint writes its generated suppression baseline without a final newline.
+[oxlint-suppressions.json]
+insert_final_newline = false