diff --git a/pyproject.toml b/pyproject.toml
index 919c1f2..e1c758d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -29,4 +29,8 @@ lint.ignore = ["E203","E501","UP006","UP007","UP035"]
 [tool.pytest.ini_options]
 testpaths = ["tests"]
 python_files = ["test_*.py"]
-addopts = ["--tb=short", "-v"]
\ No newline at end of file
+addopts = ["--tb=short", "-v"]
+markers = [
+  "unit: Fast unit tests with no external dependencies (GPU, network, cluster)",
+  "integration: Tests requiring external resources (notebook execution, GPU, Docker)",
+]
\ No newline at end of file