diff --git a/pyproject.toml b/pyproject.toml
index c48afa5..5a9141f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -17,6 +17,3 @@ include_trailing_comma = true
 force_grid_wrap = 0
 use_parentheses = true
 line_length = 100
-
-[tool.coverage.run]
-concurrency = ["greenlet"]