diff --git a/.gitignore b/.gitignore
index 94b7ff3cd..ccc1f01c1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -38,3 +38,6 @@ states/
 
 # CI-downloaded Lambda artifacts (used by Docker builds; not committed)
 quickwit/lambda-artifact/
+
+# OpenSSL CA serial file generated during TLS test setup
+**/ca.srl
diff --git a/quickwit/resources/tests/tls/ca.srl b/quickwit/resources/tests/tls/ca.srl
deleted file mode 100644
index e06108f0f..000000000
--- a/quickwit/resources/tests/tls/ca.srl
+++ /dev/null
@@ -1 +0,0 @@
-083453D85C20FF26BD4F878E64C2F3C62316E7A6