diff --git a/openapi-client.yaml b/openapi-client.yaml
index 2a1e029..9f93255 100644
--- a/openapi-client.yaml
+++ b/openapi-client.yaml
@@ -1,3 +1,4 @@
 project_name_override: oblidog-client
 package_name_override: oblidog_client_generated
-use_path_prefixes_for_title_model_names: false
+# Inline schemas can share titles (for example error response "Params").
+use_path_prefixes_for_title_model_names: true
diff --git a/tests/test_generation.py b/tests/test_generation.py
new file mode 100644
index 0000000..01d4a8e
--- /dev/null
+++ b/tests/test_generation.py
@@ -0,0 +1,74 @@
+"""Regression coverage for error schemas with repeated inline model titles."""
+
+import importlib
+import json
+import subprocess
+import sys
+from pathlib import Path
+
+import httpx
+import pytest
+
+
+def test_generation_preserves_conflicts_with_duplicate_params_titles(
+    tmp_path: Path, monkeypatch: pytest.MonkeyPatch
+) -> None:
+    root = Path(__file__).resolve().parents[1]
+    spec = json.loads((root / "openapi/integration.json").read_text())
+    schemas = spec["components"]["schemas"]
+    params = {"type": "object", "title": "Params", "additionalProperties": True}
+    schemas["ApiErrorResponse"] = {
+        "type": "object",
+        "properties": {"params": params},
+    }
+    schemas["IntegrationConflictResponse"]["properties"]["params"] = params
+    schema_path = tmp_path / "integration.json"
+    schema_path.write_text(json.dumps(spec))
+    result = subprocess.run(
+        [
+            sys.executable,
+            "-m",
+            "openapi_python_client",
+            "generate",
+            "--fail-on-warning",
+            "--path",
+            str(schema_path),
+            "--config",
+            str(root / "openapi-client.yaml"),
+            "--meta",
+            "none",
+            "--output-path",
+            str(tmp_path / "regression_client"),
+        ],
+        capture_output=True,
+        check=False,
+        text=True,
+        cwd=tmp_path,
+        timeout=60,
+    )
+    assert result.returncode == 0, result.stdout + result.stderr
+
+    monkeypatch.syspath_prepend(str(tmp_path))
+    models = importlib.import_module("regression_client.models")
+    params_payload = {"revision": 3}
+    for name in ("ApiErrorResponse", "IntegrationConflictResponse"):
+        payload = {
+            "code": "integration_conflict",
+            "detail": {"code": "revision_conflict"},
+            "params": params_payload,
+        }
+        assert getattr(models, name).from_dict(payload).to_dict() == payload
+
+    client = importlib.import_module("regression_client.client").AuthenticatedClient(
+        base_url="https://example.test", token="test"
+    )
+    for operation in ("start", "finish"):
+        endpoint = importlib.import_module(
+            f"regression_client.api.integration.integration_{operation}_integration_run"
+        )
+        response = endpoint._parse_response(
+            client=client,
+            response=httpx.Response(409, json=payload),
+        )
+        assert isinstance(response, models.IntegrationConflictResponse)
+        assert response.to_dict() == payload