diff --git a/backend/scripts/soak.py b/backend/scripts/soak.py
index 813e2c3..dc1f83d 100644
--- a/backend/scripts/soak.py
+++ b/backend/scripts/soak.py
@@ -849,13 +849,13 @@ def clear_redis() -> None:
 
 def clear_observability() -> None:
     """The collector wrote rollups, runs and events for the soak flows."""
-    names = ", ".join(repr(flow) for flow in FLOWS)
+    marks = ", ".join("?" for _ in FLOWS)
     script = "\n".join(
         [
             "import sqlite3",
             "db = sqlite3.connect('/data/fluksio.db')",
             *(
-                f"db.execute('DELETE FROM {table} WHERE flow IN ({names})')"
+                f"db.execute('DELETE FROM {table} WHERE flow IN ({marks})', {FLOWS!r})"
                 for table in ("metric_minute", "flow_run", "engine_event")
             ),
             "db.commit()",