diff --git a/tests/conftest.py b/tests/conftest.py
index 43292cb..aa2d077 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import importlib.util
+import os
 import shutil
 import sys
 from contextlib import contextmanager
@@ -32,7 +33,9 @@
 
 IS_VALGRIND_INSTALLED = shutil.which("valgrind") is not None
 skip_without_valgrind = pytest.mark.skipif(
-    not IS_VALGRIND_INSTALLED, reason="valgrind not installed"
+    "PYTEST_CODSPEED_FORCE_VALGRIND_TESTS" not in os.environ
+    and not IS_VALGRIND_INSTALLED,
+    reason="valgrind not installed",
 )
 
 if IS_VALGRIND_INSTALLED:
diff --git a/tests/examples/__init__.py b/tests/examples/__init__.py
new file mode 100644
index 0000000..e69de29