diff --git a/pyproject.toml b/pyproject.toml
index ae9d4507a2..f36080e1ce 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -37,3 +37,7 @@ doctest_optionflags = [
 
 [tool.pytest.ini_options]
 addopts = "--cov=src/peft --cov-report=term-missing"
+markers = [
+    "single_gpu_tests: tests that run on a single GPU",
+    "multi_gpu_tests: tests that run on multiple GPUs",
+]