diff --git a/tests/test_unseen_image.py b/tests/test_unseen_image.py
deleted file mode 100644
index 000cd2c..0000000
--- a/tests/test_unseen_image.py
+++ /dev/null
@@ -1,22 +0,0 @@
-"""Static image contract; no Docker invocation."""
-
-import hashlib
-from pathlib import Path
-
-ROOT = Path(__file__).resolve().parents[1]
-# The engine portion is pinned so that adding the replay stage cannot silently change the engine image.
-# Recompute after an intentional engine-stage change: it is sha256 of `engine.rstrip() + "\n"` where `engine`
-# is everything before the `FROM ${ENGINE_REF} AS replay` line.
-ENGINE_SHA = "77c34f3381cef6c6d1f7fd761cd3924a3656cc5e6eb20c51c819de77afb4b2fc"
-
-
-def test_image_stages():
-    text = (ROOT / "plane/Dockerfile.engine-task").read_text()
-    # The replay stage builds FROM the engine stage (via the ENGINE_REF arg, default `engine`).
-    engine, replay = text.split("FROM ${ENGINE_REF} AS replay", 1)
-    assert hashlib.sha256((engine.rstrip() + "\n").encode()).hexdigest() == ENGINE_SHA
-    # Task base is digest-pinned (no floating fallback) and built in two stages: joern-build -> engine.
-    assert "FROM ghcr.io/norandom/ousast-task-base:${TASK_BASE_TAG}@${TASK_BASE_DIGEST} AS joern-build" in engine
-    assert "FROM ghcr.io/norandom/ousast-task-base:${TASK_BASE_TAG}@${TASK_BASE_DIGEST} AS engine" in engine
-    # The replay stage is a pure addition on top of engine: the unseen replay harness + a smoke check.
-    assert "replay_entry.py" in replay and "ousast pre-push --help" in replay