diff --git a/tests/functional/conftest.py b/tests/functional/conftest.py
index e2b732de..34ce72ff 100644
--- a/tests/functional/conftest.py
+++ b/tests/functional/conftest.py
@@ -31,11 +31,11 @@ def pytest_sessionstart(session: pytest.Session) -> None:
             text=True,
             check=True,
         )
-        print("uv build output: %s", result.stdout)  # noqa: T201
-        print("uv build errors: %s", result.stderr)  # noqa: T201
+        print(f"uv build output: {result.stdout}")  # noqa: T201
+        print(f"uv build errors: {result.stderr}")  # noqa: T201
     except subprocess.CalledProcessError as e:
-        print("Output: %s", e.output)  # noqa: T201
-        print("Errors: %s", e.stderr)  # noqa: T201
+        print(f"Output: {e.output}")  # noqa: T201
+        print(f"Errors: {e.stderr}")  # noqa: T201
         raise