diff --git a/ocr-service/test_tmpdir.py b/ocr-service/test_tmpdir.py
index 1ea985b1..1d40433d 100644
--- a/ocr-service/test_tmpdir.py
+++ b/ocr-service/test_tmpdir.py
@@ -54,6 +54,10 @@ def test_entrypoint_creates_tmpdir(tmp_path):
         capture_output=True,
         text=True,
     )
+    assert result.returncode == 0, (
+        f"entrypoint.sh exited {result.returncode}\n"
+        f"stdout: {result.stdout}\nstderr: {result.stderr}"
+    )
     assert custom_tmp.exists(), (
         f"entrypoint.sh did not create TMPDIR={custom_tmp}\n"
         f"stdout: {result.stdout}\nstderr: {result.stderr}"