diff --git a/pyproject.toml b/pyproject.toml
index ad67d3b..1307e1f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -32,7 +32,7 @@ test = [
 	"pytest-cov",
 	"pytest-mypy",
 	"pytest-enabler >= 2.2",
-	"pytest-ruff >= 0.2.1",
+	"pytest-ruff >= 0.2.1; sys_platform != 'cygwin'",
 
 	# local
 ]