diff --git a/tests/e2e/codex/test_auto_compaction_e2e.py b/tests/e2e/codex/test_auto_compaction_e2e.py
index 13667c8bd6e..165a0161506 100644
--- a/tests/e2e/codex/test_auto_compaction_e2e.py
+++ b/tests/e2e/codex/test_auto_compaction_e2e.py
@@ -26,6 +26,7 @@ class TestCodexAutoCompaction:
             cwd=workspace,
             compact_after_tokens=COMPACT_AFTER_TOKENS,
         )
+        assert first.exit_code == 0, first
         assert first.thread_id is not None, first
         (workspace / "secret.txt").unlink()
         second: Final = codex.resume(
@@ -35,5 +36,6 @@ class TestCodexAutoCompaction:
             cwd=workspace,
             compact_after_tokens=COMPACT_AFTER_TOKENS,
         )
+        assert second.exit_code == 0, second
         assert any(compaction.remote for compaction in codex.compactions(first.thread_id)), (first, second)
         assert marker in second.answer, second
diff --git a/tests/e2e/codex/test_real_model_name_e2e.py b/tests/e2e/codex/test_real_model_name_e2e.py
index ab8997ef673..9b9b4c21003 100644
--- a/tests/e2e/codex/test_real_model_name_e2e.py
+++ b/tests/e2e/codex/test_real_model_name_e2e.py
@@ -42,6 +42,7 @@ class TestCodexUnderTheRealModelName:
             cwd=workspace,
             compact_after_tokens=COMPACT_AFTER_TOKENS,
         )
+        assert first.exit_code == 0, first
         assert first.thread_id is not None, first
         (workspace / "secret.txt").unlink()
         second: Final = real_name_codex.resume(
@@ -51,5 +52,6 @@ class TestCodexUnderTheRealModelName:
             cwd=workspace,
             compact_after_tokens=COMPACT_AFTER_TOKENS,
         )
+        assert second.exit_code == 0, second
         assert any(compaction.remote for compaction in real_name_codex.compactions(first.thread_id)), (first, second)
         assert marker in second.answer, second