diff --git a/scripts/run-tests.sh b/scripts/run-tests.sh
index 79fa133..006fd30 100755
--- a/scripts/run-tests.sh
+++ b/scripts/run-tests.sh
@@ -1,4 +1,11 @@
 #!/usr/bin/env bash
 set -euo pipefail
 cd "$(dirname "${BASH_SOURCE[0]}")/.."
+
+# Drop containers AND volumes from any prior run. The test-db image only runs
+# /docker-entrypoint-initdb.d on a fresh data directory; reusing the volume
+# silently skips schema migrations and produces phantom "relation does not
+# exist" failures (e.g. detection_classes, resources). Always start clean.
+docker compose -f docker-compose.test.yml down -v --remove-orphans
+
 docker compose -f docker-compose.test.yml up --build --abort-on-container-exit --exit-code-from e2e-consumer --attach e2e-consumer