diff --git a/src/pip/_internal/build_env/__init__.py b/src/pip/_internal/build_env/__init__.py
index 4d55ca73970..9e32014ac9a 100644
--- a/src/pip/_internal/build_env/__init__.py
+++ b/src/pip/_internal/build_env/__init__.py
@@ -5,6 +5,6 @@
 
 from pip._internal.build_env._base import BuildEnvironment, get_runnable_pip
 from pip._internal.build_env._custom import CustomBuildEnvironment
-from pip._internal.build_env.noop import NoOpBuildEnvironment
+from pip._internal.build_env._noop import NoOpBuildEnvironment
 
 BuildIsolationMode = Literal["noop", "custom", "venv"]
diff --git a/src/pip/_internal/build_env/noop.py b/src/pip/_internal/build_env/_noop.py
similarity index 100%
rename from src/pip/_internal/build_env/noop.py
rename to src/pip/_internal/build_env/_noop.py