diff --git a/Dockerfile b/Dockerfile
index 26479da..d06d5b1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -11,10 +11,6 @@ RUN pip install --no-cache-dir -r requirements.txt
 COPY app ./app
 COPY alembic_app ./alembic_app
 COPY alembic_app.ini ./
-COPY alembic_location ./alembic_location
-COPY alembic_location.ini ./
-COPY alembic_poo ./alembic_poo
-COPY alembic_poo.ini ./
 COPY scripts ./scripts
 COPY docker ./docker
 COPY README.md ./
diff --git a/tests/test_deployment.py b/tests/test_deployment.py
index 6bc10b2..5d84fb1 100644
--- a/tests/test_deployment.py
+++ b/tests/test_deployment.py
@@ -64,6 +64,24 @@ def test_image_defaults_to_uvicorn_only() -> None:
     assert "poo_db_adopt" not in entrypoint
 
 
+def test_dockerfile_copy_sources_exist() -> None:
+    """Every path the Dockerfile COPYs from the build context must exist in the
+    repo, so the image build cannot break on a stale COPY of a removed path
+    (e.g. the retired alembic_location / alembic_poo chains)."""
+    dockerfile = (PROJECT_ROOT / "Dockerfile").read_text()
+    for raw_line in dockerfile.splitlines():
+        line = raw_line.strip()
+        if not line.startswith("COPY "):
+            continue
+        # Drop the "COPY" keyword and any flags (e.g. --from=, --chown=).
+        tokens = [t for t in line.split()[1:] if not t.startswith("--")]
+        # COPY <src...> <dest>: the last token is the destination.
+        for src in tokens[:-1]:
+            assert (PROJECT_ROOT / src).exists(), (
+                f"Dockerfile COPY source does not exist in the build context: {src}"
+            )
+
+
 def test_migration_runner_initializes_and_is_idempotent(
     tmp_path: Path, monkeypatch: pytest.MonkeyPatch
 ) -> None: