diff --git a/pyproject.toml b/pyproject.toml
index 21b0ff42e..c02a079f6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -228,6 +228,7 @@ markers = [
     "tts: TTS model tests",
     "cache: Cache backend tests",
     "parallel: Parallelism/distributed tests",
+    "sp: Sequence parallelism tests",
     "example: Doc example code tests",
     # platform markers
     "cpu: Tests that run on CPU",