diff --git a/micro_benchmarks/serializers/bench_line.py b/micro_benchmarks/serializers/bench_line.py
index 1e3e1d5b..a5b04186 100644
--- a/micro_benchmarks/serializers/bench_line.py
+++ b/micro_benchmarks/serializers/bench_line.py
@@ -18,7 +18,7 @@ def line_str(request: pytest.FixtureRequest) -> str:
     return ("x" * (size - 1)) + "\n"
 
 
-@pytest.fixture
+@pytest.fixture(scope="module")
 def line_bytes(line_str: str) -> bytes:
     return bytes(line_str, "utf-8")